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Dell EMC VMAX

Monitor Dell EMC Enterprise Storage

Data Collection Setup

Metrics are collected via the REST API from the Unisphere system attached to the VMAX array.

Network Requirements

Port: 8443 (TCP) HTTPS to the REST API on the Unisphere system

Least Privileged User

A Unisphere user account with read-only permissions.

Supported Versions

Hardware Generations:

  • VMAX2
  • VMAX3
  • VMAX AFA

API:

  • Unisphere REST API 8.1+

Connection Parameters

NameRequired?Description
HostRequiredThe EMC VMAX storage array to connect to.
PortThe port for communication to the EMC VMAX storage array.
UsernameRequired
PasswordRequired
Collect EventsControls whether events are collected and returned.
Max EventsThe maximum number of events to collect.
Event Cutoff TimeEvents before this time will not be collected.
Exclude EventsA comma separated list of strings. Events will not be created when their message contains any of these strings.
Symmetrix IDs WhitelistA whitelist of symmetrix ID's to collect data from.
Enable All CiphersControls whether to enable all available SSL ciphers.
Enable VolumesControls whether to collect volumes.
Enable Front End PortsControls whether to collect front end ports.
Enable Back End PortsControls whether to collect back end ports.
Request Timeout (seconds)The number of seconds to allow for the API to return a response.
Thread Pool SizeMaximum number of threads used to perform collection.

Metrics

Array

NameDescription
Average LRU0 Fall-Through Time (Milliseconds)The average time it takes a cache slot in LRU0 to be freed up. It is the average time from the first use of the contents to its reuse by another address.
Average ORM Size (Kilobytes per Second)The average read size of the read requests performed directly from disks bypassing the cache.
Back End IO Rate (Operations per Second)A data transfer of a read between the cache and the director.
Back End Reads (Operations per Second)A data transfer of a read between the cache and the director.
Back End Request Rate (per Second)A data transfer of a read or write between the cache and the director.
Back End Writes (Operations per Second)A data transfer of a write between the cache and the director.
BoardsNumber of Boards of the Array.
Cache Hit Rate (per Second)The total requests from all FE directors per second that were satisfied from cache.
Cache Hit Ratio (%)The percent of IO operations performed by all of the Symmetrix volumes, for which the read data was in cache and the write operation could be sent directly to cache without having to wait for data to be destaged from cache to the disks.
Cache Miss Ratio (%)Cache Miss Ratio of the Array.
Device CountThe number of Device resources associated with this Array resource.
Device IO Rate (Operations per Second)The number of host IO operations performed each second by all Symmetrix volumes, including writes and random and sequential reads.
Device Read Ratio (%)The percent of total read IO operations performed each second by all of the Symmetrix volumes.
Device Write Ratio (%)The percent of total write IO operations performed by all of the Symmetrix volumes.
Devices Write Pending Events Rate (per Second)The number of times each second that the write-pending limit for a specific Symmetrix volume was reached.
Front End Read Requests Rate (Requests per Second)A read data transfer between the director and the cache. An IO may require multiple requests depending on IO size, alignment, or both. The requests rate should be either equal to or greater than the IO rate.
Front End Write Requests Rate (Requests per Second)A write data transfer between the director and the cache. An IO may require multiple requests depending on IO size, alignment, or both. The requests rate should be either equal to or greater than the IO rate.
Host IO Rate (Operations per Second)Total Host IOPS of the Array.
Host IO Throughput (per Second)The total requests from all FE directors per second that were satisfied from cache.
IO Latency (Milliseconds)Combined Latency of the Array.
LocalWhether or not this Array is local to the endpoint we are collecting against.
Maximum Observed Host Throughput (Megabytes per Second)Maximum Observed Host Throughput of the Array.
Maximum Observed Total Back End IO Rate (Operations per Second)Maximum Observed Total Back End IOPS of the Array.
Maximum Observed Total Host IO Rate (Operations per Second)Maximum Observed Total Host IOPS of the Array.
MicrocodeThe microcode ID for this Array resource.
ModelThe model number of this Array resource.
ORM Rate (Operations per Second)Number of read requests each second performed directly from disks bypassing the cache.
ORM Throughput (Megabytes per Second)Number of host MBs read each second directly from disks bypassing the cache.
Prefetched Track Rate (per Second)The tracks per second pre-fetched from disk to cache upon detection of a sequential read stream.
Read Cache Hit Rate (per Second)The total read requests from all FE directors per second that were satisfied from cache.
Read Latency (Milliseconds)The calculated system read response time.
Read Miss Rate (per Second)Total read requests from all FE directors per second that were misses. A miss occurs when the requested read data is not found in cache.
Read Rate (Operations per Second)The number of host read operations performed each second by all Symmetrix volumes.
Read Throughput (Megabytes per Second)The number of host MBs read by all of the Symmetrix volumes each second.
Request Rate (Requests per Second)A data transfer between the director and the cache. An IO may require multiple requests depending on IO size, alignment, or both. The requests rate should be either equal to or greater than the IO rate.
Symmetrix IdSymmetrix Id of the array this Array is a part of.
System Write Pending Event Rate (per Second)The number of times each second that write activity was heavy enough to use up the system limit set for write tracks occupying cache. When the limit is reached, writes are deferred until data in cache is written to disk.
Total Cache Utilization (%)The percent of system cache that is write pending.
Total Volume Capacity (Megabytes)The total capacity (in MB) of all related Volumes.
Total Volume Used Space (Megabytes)The total used space (in MB) of all related Volumes.
Write Cache Hit Rate (per Second)The total write requests from all FE directors per second that were satisfied from cache.
Write Latency (Milliseconds)The calculated system write response time.
Write Miss Rate (per Second)The total write requests from all FE directors per second that were misses. A miss occurs when the write operation had to wait while data was destaged from cache to the disks.
Write Rate (Operations per Second)The number of host write operations performed each second by all Symmetrix volumes.
Write Throughput (Megabytes per Second)The number of host MBs written by all of the Symmetrix volumes each second.
Writes PendingThe number of system cache slots that are write pending.
Writes Pending Limit (%)The percent of the target % at which writes are delayed. The range is from 40% to 80%.

Back End Director

NameDescription
Average System Call Time (Milliseconds)The average time spent processing all system calls.
Busy Time Ratio (%)The percent of time that a director is busy.
Compressed IO Throughput (Megabytes per Second)The total size of compressed MBs (read and write) per second.
Compressed Read Request Rate (Operations per Second)The number of compressed read requests per second.
Compressed Read Throughput (Megabytes per Second)The size of compressed read MBs per second.
Compressed RequestsThe total number of compressed requests (read and write) per second.
Compressed Write Request Rate (Operations per Second)The number of compressed write requests per second.
Compressed Write Throughput (Megabytes per Second)The size of compressed write MBs per second.
Core 0 Busy Time Ratio (%)The total percent of time that core 0 is busy serving IOs.
Core 0 Non-IO Busy Time Ratio (%)The total percent of time that core 0 is busy serving non-IO tasks.
Core 1 Busy Time Ratio (%)The total percent of time that core 1 is busy serving IOs.
Core 1 Non-IO Busy Time Ratio (%)The total percent of time that core 1 is busy serving non-IO tasks.
Director IDDirector ID of this Back End Director.
IO Rate (Operations per Second)An IO command to the disk.
IO Throughput (Megabytes per Second)The total IO (reads and writes) per second in MBs.
Maximum Observed IO Rate (Operations per Second)Maximum Observed Combined IOPS of the Back End Director.
Maximum Observed IO Throughput (Megabytes per Second)Maximum Observed Combined Throughput of the Back End Director.
Non-IO Busy Time Ratio (%)The total percent of time that the DA is busy serving non-IO tasks.
PortsThe number of ports belonging to this director.
Prefetched Track Rate (per Second)The number of tracks pre-fetched from disk to cache upon detection of a sequential read stream.
RDF System Call Rate (per Second)The number of calls sent using RDF to a remote system.
Read Rate (Operations per Second)A data transfer of a read between the director and the cache.
Read Throughput (Megabytes per Second)The reads per second in MBs.
Relationship ReferenceA reference to the Back End Director's children ports.
Remote System Call Rate (per Second)The number of calls sent from the local director to another director in the same system.
Symmetrix IdSymmetrix Id of the array this Back End Director is a part of.
System Call Rate (per Second)The total number of calls seen by this director.
Write Rate (Operations per Second)A data transfer of a write between the cache and the director.
Write Throughput (Megabytes per Second)The writes per second in MBs.

Back End Port

NameDescription
Average IO SizeThe average IO size served by the port.
Busy Time Ratio (%)The percent of time the port is busy.
CoresThe number of cores belonging to this port.
Director IDDirector ID of this Back End Port.
Director StatusThe current status of the port's director.
HypersThe number of hypers belonging to this port.
IdentifierThe port identifier.
IO Rate (Operations per Second)An IO command to the disk.
IO Throughput (Megabytes per Second)The total IO (reads and writes) per second in MBs.
Maximum Speed (Gigabits per Second)The maximum speed of the port.
Port GroupThe port group that this port belongs to.
Port IDPort ID of this Back End Port.
Port InterfaceThe port interface.
Port StatusThe current status of the port.
Read Rate (Operations per Second)A read data transfer between the director and the cache. An IO may require multiple requests depending on IO size, alignment or both. The requests rate should be either equal to or greater than the IO rate.
Read Throughput (Megabytes per Second)The reads per second in MBs.
Speed (Gigabits per Second)The speed of the port.
Symmetrix IdSymmetrix Id of the array this Back End Port is a part of.
Symmetrix Port KeyThe ID of the port's corresponding director and the ID of the port itself.
TypeThe port type.
Write Rate (Operations per Second)A write data transfer between the director and the cache. An IO may require multiple requests depending on IO size, alignment or both. The requests rate should be either equal to or greater than the IO rate.
Write Throughput (Megabytes per Second)The writes per second in MBs.

Disk Group

NameDescription
Average Read Size (Kilobytes)The average number of kilobytes for a single read command.
Average Write Size (Kilobytes)The average number of kilobytes for a single write command.
Busy Time Ratio (%)The percent of time that the disk group is busy serving IOs.
Disk Group IDDisk Group ID of this Disk Group.
Free Disk Capacity Ratio (%)The percent of the disk group capacity that is free.
IO DensityThe number of BE requests per GB of disk: (BE Reads + BE Writes) / allocated capacity. With FAST moving active extents to higher tiers, this metric is a good indication of success (the IO density on Flash tiers should be higher than the density on SATA tiers.)
IO Latency (Milliseconds)The average time it took the disk group to service IO.
io_rate (Operations per Second)The total number of read and write IOs per second.
IO Throughput (Megabytes per Second)The total number of MBs per second for the disk group.
Maximum Observed Combined Throughput (Megabytes per Second)Maximum Observed Combined Throughput of the Disk Group.
Maximum Observed IO Rate (Operations per Second)Maximum Observed Combined IOPS of the Disk Group.
Read IO Rate (Operations per Second)The number of reads per second for the disk group.
Read Latency (Milliseconds)The average time it took the disk group to serve one read command.
Read Throughput (Megabytes per Second)The read throughput (MBs) of the disk group per second.
SCSI Command Rate (Calls per Second)The total number of read commands, write commands, skip mask commands, verify commands, XOR write commands, and XOR write-read commands performed by the disk group each second.
Symmetrix IdSymmetrix Id of the array this Disk Group is a part of.
Total Disk Capacity (Gigabytes)The total capacity of all the disks in the disk group.
Used Disk Capacity (Gigabytes)The total capacity allocated for all the disks in the disk group.
Used Disk Capacity Ratio (%)The percent of the disk group capacity that is allocated.
Write Latency (Milliseconds)The average time it took the disk group to serve one write command.
Write Rate (Operations per Second)The number of writes per second for the disk group.
Write Throughput (Megabytes per Second)The write throughput (MBs) of the disk group per second.

FAST VP Policy

NameDescription
FAST Policy IDFAST Policy ID of this FAST VP Policy.
Storage Group IDAn array of associated storage groups.
SuccessWhether or not the FAST VP Policy is successful.
Symmetrix IdSymmetrix Id of the array this FAST VP Policy is a part of.
Tier 1 Capacity (%)The percentage from Tier 1 that the FAST VP Policy is allowed to use at any given time.
Tier 1 IDThe ID of Tier 1.
Tier 2 Capacity (%)The percentage from Tier 2 that the FAST VP Policy is allowed to use at any given time.
Tier 2 IDThe ID of Tier 2.
Tier 3 Capacity (%)The percentage from Tier 3 that the FAST VP Policy is allowed to use at any given time.
Tier 3 IDThe ID of Tier 3.
Tier 4 Capacity (%)The percentage from Tier 4 that the FAST VP Policy is allowed to use at any given time.
Tier 4 IDThe ID of Tier 4.
TiersThe number of tiers associated with the FAST VP Policy.

Front End Director

NameDescription
Average ORM Size (Kilobytes)The average read size of the read requests performed directly from disks bypassing the cache.
Average Queue Depth Range 8As an IO enters the queue it first checks how deep the queue is. Based on depth, the applicable queue depth bucket increments with the value seen by the IO. For example, an IO that encounters a queue depth of 7 will increment bucket #2 (depth 5-9 for OS or 7-14 for MF) by 7. The intent of these buckets is to identify IO bursts which in turn generate large queues and long response times.
Average Time Per System Call (Milliseconds)The average time that it took to serve one system call.
Busy Time Ratio (%)The percent of time the directory is busy.
Cache Hit Rate (per Second)A request that is immediately serviced from the cache (instead of having to wait for the data to arrive, or destage from the disk.)
Cache Hit Ratio (%)The percent of requests that are served from cache.
Cache Miss Rate (per Second)A request that is a miss.
Cache Miss Ratio (%)Cache Miss Ratio of the Front End Director.
Devices Write Pending Event Rate (per Second)A write miss due to the volume write pending limit having been reached.
Director IDDirector ID of this Front End Director.
Host IO Throughput (Megabytes per Second)The size of the data transfer from the host in MBs per second.
IO Latency (Milliseconds)Total Latency of the Front End Director.
IO Rate (Operations per Second)A host command for data transfer.
Maximum Observed Host Throughput (Megabytes per Second)Maximum Observed Host Throughput of the Front End Director.
Maximum Observed IO Rate (Operations per Second)Maximum Observed Combined IOPS of the Front End Director.
ORM Request Rate (Operations per Second)Number of read requests each second performed directly from disks bypassing the cache.
ORM Throughput (Megabytes per Second)Number of host MBs read each second directly from disks bypassing the cache.
PortsThe number of ports belonging to this director.
Quota IO Rate (Operations per Second)The number of IOs per second that are executed by the director under IO quota limits.
Quota IO Throughput (Megabytes per Second)The throughput in MBs that are transferred by the director under IO quota limits.
RDF System Call Rate (Calls per Second)The number of calls per second sent via RDF to a remote system.
Read Cache Hit Rate (per Second)A read request that is immediately serviced from the cache (instead of having to wait for the data to arrive from the disk.)
Read Cache Hit Ratio (%)The percent of read requests that are served from cache.
Read Cache Miss Rate (per Second)A read request that cannot be satisfied immediately from the cache and needs to wait for the data to arrive from the disk.
Read Latency (Milliseconds)A calculated average response time for reads.
Read Rate (Operations per Second)A read data transfer between the director and the cache. An IO may require multiple requests depending on IO size, alignment or both. The requests rate should be either equal to or greater than the IO rate.
Read Ratio (%)The percent of read requests out of host commands for data transfer.
Relationship ReferenceA reference to the Front End Director's children ports.
Remote System Call Rate (Calls per Second)The number of calls per second sent from the local director to another director in the same system.
Request Rate (Requests per Second)The data transfer between the director and the cache. An IO may require multiple requests depending on IO size, alignment or both. The requests rate should be either equal to or greater than the IO rate.
Slot Collision Rate (per Second)A write miss due to the desired cache slot being locked by another request.
Symmetrix IdSymmetrix Id of the array this Front End Director is a part of.
System Call Rate (Calls per Second)The total number of calls seen by this director.
System Write Pending Event Rate (per Second)A write miss due to the system write pending limit having been reached.
Total Read Rate (Operations per Second)The total number of reads to the FE directors.
Total Write Rate (Operations per Second)The total number of writes to the FE directors.
Write Cache Hit Rate (per Second)A write request that is immediately serviced from the cache (instead of having to wait for the data to be destaged to the disk.)
Write Cache Hit Ratio (%)The percent of write requests that were satisfied from cache.
Write Cache Miss Rate (per Second)A write request that cannot be satisfied immediately from the cache and needs to wait for the data to be destaged to the disk.
Write Latency (Milliseconds)A calculated average response time for writes.
Write Rate (Operations per Second)A write data transfer between the director and the cache. An IO may require multiple requests depending on IO size, alignment or both. The requests rate should be either equal to or greater than the IO rate.
Write Ratio (%)The percent of write requests out of host commands for data transfer.

Front End Port

NameDescription
Average IO SizeThe average IO size served by the port.
Busy Time Ratio (%)The percent of time the port is busy.
CoresThe number of cores belonging to this port.
Director IDDirector ID of this Front End Port.
Director StatusThe current status of the port's director.
HypersThe number of hypers belonging to this port.
IdentifierThe port identifier.
IO Rate (Operations per Second)An IO command to the disk.
IO Throughput (Megabytes per Second)The total IO (reads and writes) per second in MBs.
Port GroupThe port group that this port belongs to.
Port IDPort ID of this Front End Port.
Port InterfaceThe port interface.
Port StatusThe current status of the port.
Read Rate (Operations per Second)A read data transfer between the director and the cache. An IO may require multiple requests depending on IO size, alignment or both. The requests rate should be either equal to or greater than the IO rate.
Read Throughput (Megabytes per Second)The reads per second in MBs.
Symmetrix IdSymmetrix Id of the array this Front End Port is a part of.
Symmetrix Port KeyThe ID of the port's corresponding director and the ID of the port itself.
TypeThe port type.
Write Rate (Operations per Second)A write data transfer between the director and the cache. An IO may require multiple requests depending on IO size, alignment or both. The requests rate should be either equal to or greater than the IO rate.
Write Throughput (Megabytes per Second)The writes per second in MBs.

Host Group

NameDescription
Consistent LUNWhether or not the LUN is consistent.
Host Group IDHost Group ID of this Host Group.
InitiatorsThe number of initiators in the Host Group.
Port Flags Override EnabledWhether or not the Port Flags Override is set.
Symmetrix IdSymmetrix Id of the array this Host Group is a part of.
TypeThe type of Host Group.

Masking View

NameDescription
Host Group IDThe ID of the host group associated with this masking view.
Masking View IDMasking View ID of this Masking View.
Port Group IDThe ID of the port group associated with this masking view.
Storage Group IDThe ID of the storage group associated with this masking view.
Symmetrix IdSymmetrix Id of the array this Masking View is a part of.

Port Group

NameDescription
Average IO SizeThe average IO size served by the port.
Busy Time Ratio (%)The percent of time the port is busy.
io_rate (Operations per Second)An IO command to the disk.
IO Throughput (Megabytes per Second)The total IO (reads and writes) per second in MBs.
Masking ViewA list of associated Masking View resources associated with this Port Group resource..
Masking ViewsThe number of Masking View resources associated with this Port Group resource.
Port Group IDPort Group ID of this Port Group.
PortsThe number of Port resources associated with this Port Group resource.
Read Rate (Operations per Second)A read data transfer between the director and the cache. An IO may require multiple requests depending on IO size, alignment or both. The requests rate should be either equal to or greater than the IO rate.
Read Throughput (Megabytes per Second)The reads per second in MBs.
Symmetrix IdSymmetrix Id of the array this Port Group is a part of.
Symmetrix Port KeyThe key port of this Port Group resource.
TypeThe type of port for this Port Group resource.
Write Rate (Operations per Second)A write data transfer between the director and the cache. An IO may require multiple requests depending on IO size, alignment or both. The requests rate should be either equal to or greater than the IO rate.
Write Throughput (Megabytes per Second)The writes per second in MBs.

SLO

NameDescription
SLO IDSLO ID of this SLO.
Storage Group IDA list of Storage Group resource IDs that this SLO resource is associated with.
Storage GroupsThe number of Storage Group resources that this SLO resource is associated with.
Symmetrix IdSymmetrix Id of the array this SLO is a part of.
Workload IDA list of workload IDs that are associated with this SLO resource.
WorkloadsThe number of workloads that are associated with this SLO resource.

Storage Group

NameDescription
Allocated TracksThe total number of allocated tracks.
Average Back End Disk Time (Milliseconds)The average time it takes cache to respond to a read request by the disk directors.
Average Back End Request Time (Milliseconds)The average time it takes to make a request by the disk directors to the cache.
Average Back End Task Time (Milliseconds)The time from the point when the HA puts the read request on the queue and the DA picks it up; this can be considered queue time.
Average IO Size (Kilobytes)Calculated value: (HA Kbytes transferred per sec / total IOs per sec)
Average Read Size (Kilobytes)Calculated value: (Kbytes read per sec/total reads per sec)
Average Write Size (Kilobytes)Calculated value: (Kbytes written per sec/total writes per sec)
Back End IO Throughput (Megabytes per Second)The number of MBs read per second + MBs written per second.
Back End Prefetched Track Rate (per Second)The total prefetched tracks each second from the disk directors to the cache.
Back End Prefetched Track Used Rate (per Second)The number of prefetched tracks used each second from the disk directors to the cache.
Back End Read Rate (Operations per Second)The number of read requests each second performed by the disk directors to cache.
Back End Read Throughput (Megabytes per Second)The number of MBs read by the disk directors from the disk each second.
Back End Write Rate (Operations per Second)The number of write requests each second performed by the disk directors to cache.
Back End Write Throughput (Megabytes per Second)The number of MBs written to the disk from the disk director each second.
Cache Hit Ratio (%)The percent of IO operations that were immediately satisfied from cache.
Cache Miss Ratio (%)The percent of IO operations that were not immediately satisfied from cache.
Cache Write Hit Rate (Operations per Second)The host write operations performed each second by the group that were immediately satisfied from cache.
Capacity (Gigabytes)The Capacity for this Storage Group.
Child Storage GroupThe Child Storage Group for this Storage Group.
Child Storage GroupsThe Number Of Child Storage Groups for this Storage Group.
Compressed Track Ratio (%)The percent of tracks that are compressed.
Compressed TracksThe total number of tracks that are compressed.
Device Block Size (Kilobytes)The block size in KBs of the devices in this group.
Device Capacity (Gigabytes)The capacity in GBs of this group.
Device EmulationDevice Emulation for this Storage Group
Fast Policy NameThe FAST Policy for this Storage Group.
IO DensityThe number of backend reads and writes per GB of disk.
IO Latency (Milliseconds)The average response time for the reads and writes.
IO Rate (Operations per Second)The host operations performed each second by the group.
Masking ViewThe Masking View for this Storage Group.
Masking ViewsThe Number Of Masking Views for this Storage Group.
Maximum Observed Host Throughput (Megabytes per Second)The Maximum Observed Throughput of the Storage Group.
Maximum Observed IO Rate (Operations per Second)The Maximum Observed Combined IOPS of the Storage Group.
Maximum Write Pending Slots AvailableThe maximum number of write-pending slots available for the group.
ORM Average Size (Kilobytes)The average read size of the read requests performed directly from disks bypassing the cache.
ORM Rate (Operations per Second)Number of read requests each second performed directly from disks bypassing the cache.
ORM Throughput (Megabytes per Second)Number of host MBs read each second directly from disks bypassing the cache.
Parent Storage GroupsThe Number Of Parent Storage Groups for this Storage Group.
Prefetched Track IO Throughput (Megabytes per Second)The number of MBs prefetched from disk to cache in a second.
Random IOThe number of IO operations that were random.
Random Read HitsThe number of random read IOs that were satisfied from the cache.
Random Read MissesThe number of random read IOs that were misses.
Random ReadsThe number of read IO commands from a host not identified as part of a sequential stream.
Random Write HitsThe number of random write IOs that were immediately placed in cache because space was available.
Random Write MissesThe number of random write IOs that were misses.
Random WritesThe number of write IO commands from a host not identified as part of a sequential stream.
Read Cache Hit Ratio (%)The percent of read operations, performed by the group, that were immediately satisfied by cache.
Read Cache Miss Ratio (%)The percent of read miss operations performed each second by the group. A miss occurs when the requested read data is not found in cache.
Read Rate (Operations per Second)The host read operations performed each second by the group.
Read Ratio (%)The percent of IO operations that were reads.
Read Throughput (Megabytes per Second)The cumulative number of host MBs read per second by the group.
Sampled RDF Write Latency (Milliseconds)The summary of the read, write, and average response times for the selected SRDF/S group.
Sampled Read Latency (Milliseconds)The average time that it took the Symmetrix to serve one read IO for this group.
Sampled Read Miss Latency (Milliseconds)The average time that it took the Symmetrix to serve one read miss IO for this group.
Sampled Write Latency (Milliseconds)The average time that it took the Symmetrix to serve one write IO for this group.
Sampled Write Pending Disconnect Latency (Milliseconds)The average time that it took the Symmetrix to serve one write miss IO for this group.
Sequential Cache Read Hit Rate (Operations per Second)The number of sequential read operations performed each second by the group that were immediately satisfied from cache.
Sequential Cache Read Miss Rate (Operations per Second)The number of sequential read operations performed each second by the group that were misses.
Sequential Cache Write Hit Rate (Operations per Second)The number of sequential write operations performed each second by the group that were immediately satisfied from cache.
Sequential Cache Write Miss Rate (Operations per Second)The number of sequential write operations performed each second by the group that were misses.
Sequential Cache Write Rate (Operations per Second)The number of write IO operations performed each second that were sequential.
Sequential Read Rate (Operations per Second)The number of read IO operations performed each second that were sequential.
SLOThe SLO for this Storage Group.
SLO ComplianceThe SLO Compliance for this Storage Group.
SnapshotsThe Number Of Snapshots for this Storage Group.
SRPThe SRP for this Storage Group.
Storage Group IDStorage Group ID of this Storage Group.
Symmetrix IdSymmetrix Id of the array this Storage Group is a part of.
Total Back End Request Rate (Requests per Second)The number of read/write requests each second performed by the disk directors to cache
Total Cache Hit Rate (Operations per Second)The host read/write operations performed each second by the group that were immediately satisfied from cache.
Total Cache Miss Rate (Operations per Second)The number of host read/write operations performed each second by the group that could not be satisfied from cache.
Total IO Throughput (Megabytes per Second)The cumulative number of host MBs read/writes per second by the group.
Total Sequential IO Rate (Operations per Second)The number of IO operations performed each second that were sequential.
TypeThe Type for this Storage Group.
VolumesThe Number Of Volumes for this Storage Group.
WorkloadThe Workload for this Storage Group.
Write Cache Hit Ratio (%)The percent of write operations, performed by the group, that were immediately satisfied by cache.
Write Cache Miss Rate (Operations per Second)The host write operations performed each second by the group that were not satisfied from cache.
Write Miss Ratio (%)The percent of write miss operations performed each second by the group. A miss occurs when the write operation had to wait while data was destaged from cache to the disks.
Write Paced Delay (Milliseconds)The total delay in milliseconds that the RDF directors impose on RDF devices in order to better serve remote IOs.
Write Paced Latency (Milliseconds)The average time in milliseconds that host writes on RDF devices are delayed by the RDF directors.
Write Rate (Operations per Second)The host write operations performed each second by the group.
Write Ratio (%)The percent of IO operations that were writes.
Write Throughput (Megabytes per Second)The cumulative number of host MBs written per second by the group.
Writes PendingThe number of tracks currently in write pending mode for the group.

Storage Resource Pool

NameDescription
Back End IO Throughput (Megabytes per Second)The number of MBs read per second + MBs written per second.
Back End Read Requests Rate (Requests per Second)The number of read requests each second performed by the disk directors to cache.
Back End Read Throughput (Megabytes per Second)The number of MBs read by the disk directors from the disk each second.
Back End Requests Rate (Requests per Second)The number of read/write requests each second performed by the disk directors to cache.
Back End Write Requests Rate (Requests per Second)The number of writes requests each second performed by the disk directors to cache.
Back End Write Throughput (Megabytes per Second)The number of MBs written to the disk from the disk director each second.
DescriptionA description of the SRP.
Disk Group IDA list of disk group ID's associated with the SRP.
Disk GroupsThe number of disk groups associated with the SRP.
EmulationThe SRP's emulation.
Host IO Rate (Operations per Second)The total number of read and write IOs per second.
Host Read Rate (Operations per Second)The number of reads per second for the SRP.
Host Read Throughput (Megabytes per Second)The reads per second in MBs.
Host Write Rate (Operations per Second)The number of writes per second for the SRP.
Host Write Throughput (Megabytes per Second)The writes per second in MBs.
IO Latency (Milliseconds)The average time it takes to satisfy IO requests.
Maximum Observed Host IO Rate (Operations per Second)Maximum Observed Host Combined IOPS of the Storage Resource Pool.
Maximum Observed Host IO Throughput (Megabytes per Second)Maximum Observed Host Throughput of the Storage Resource Pool.
Read Latency (Milliseconds)The average time that it took the Symmetrix to serve one read IO for this group.
Remote Replica Group DSEWhether or not the SRP is usable by Remote Replica Group (RDFA) DSE.
Reserved Capacity Ratio (%)The amount of capcity that is reserved on the SRP.
SRP IDSRP ID of this Storage Resource Pool.
SRP SLO Demand IDA list of SLO demand ID's associated with the SRP.
SRP SLO DemandsThe number of SRP SLO demands.
SRP Storage Group Demand IDA list of storage group demand ID's associated with the SRP.
SRP Storage Group DemandsThe number of SRP SG demands.
Symmetrix IdSymmetrix Id of the array this Storage Resource Pool is a part of.
Total Allocated Capacity (Gigabytes)The total allocated capacity of the SRP.
Total Host IO Throughput (Megabytes per Second)Cumulative number of host MBs read/writes per second by the SRP.
Total Snapshot Allocated Capacity (Gigabytes)The total snapshot allocated capcity of the SRP.
Total SRDF DSE Allocated Capacity (Gigabytes)The total SRDF DSE allocated capacity of the SRP.
Total Subscribed Capacity (Gigabytes)The total subscribed capacity of the SRP.
Total Usable Capacity (Gigabytes)The total usable capacity of the SRP.
Write Latency (Milliseconds)The average time that it took the Symmetrix to serve one write IO for this group.

Storage Tier

NameDescription
Average Read Size (Kilobytes)The average number of kilobytes for a single read command.
Average Write Size (Kilobytes)The average number of kilobytes for a single write command.
Disk Busy Time Ratio (%)The percent of time that the disk is busy serving IOs.
Free Capacity Ratio (%)The percent of the disk capacity that is free.
Host Read Rate (Operations per Second)The number of reads per second for the disk.
Host Write Rate (Operations per Second)The number of writes per second for the disk.
IO DensityThe number of BE requests per GB of disk. (Reads + Writes) / total capacity. With FAST moving active extents to higher tiers, this metric is a good indication of success (the IO density on Flash tiers should be higher than the density on SATA tiers.)
IO Latency (Milliseconds)Calculated value: (Total Read Time/sec + Total Write Time/sec) / (Reads/sec + Writes/sec)
IO Rate (Operations per Second)The total number of read and write IOs per second.
IO Throughput (Megabytes per Second)The total MBs read and written per second.
Read Latency (Milliseconds)The average time it took the disk to serve one read command.
Read Throughput (Megabytes per Second)The read throughput (MBs) of the disk per second.
Symmetrix IdSymmetrix Id of the array this Storage Tier is a part of.
Tier IDTier ID of this Storage Tier.
Total Disk Capacity (Gigabytes)The total capacity of the disk in GBs.
Total SCSI Command Rate (Calls per Second)The total number of read commands, write commands, skip mask commands, verify commands, XOR write commands, and XOR write-read commands performed by the Symmetrix disk each second.
Used Capacity Ratio (%)The percent of the disk capacity that is used.
Used Disk Capacity (Gigabytes)The used capacity of the disk in GBs.
Write Latency (Milliseconds)The average time it took the disk to serve one write command.
Write Throughput (Megabytes per Second)The write throughput (MBs) of the disk per second.

Thin Pool

NameDescription
Allocated Pool Capacity (Gigabytes)The number of GBs of the virtual pool that are allocated.
Allocated Ratio (%)The percent allocated on this Thin Pool.
Allocated TracksThe total number of tracks of the virtual pool.
Average ORM Size (Kilobytes)The average read size of the read requests performed directly from disks bypassing the cache.
Back End IO Latency (Milliseconds)The average time it took the disk to service IO (DATA pool).
Back End IO Throughput (Megabytes per Second)Calculated value: (MBs read per sec + MBs written per sec).
Back End Read Latency (Milliseconds)The average time it took the disk to serve one read command (DATA pool).
Back End Read Ratio (%)The percent of the back-end IO that were read requests.
Back End Read Request Rate (Operations per Second)The number of read requests each second performed by the disk directors to cache.
Back End Read Throughput (Megabytes per Second)The number of MBs read by the disk directors from the disk each second.
Back End Total Request Rate (Requests per Second)The number of read/write requests each second performed by the disk directors to cache.
Back End Write Latency (Milliseconds)The average time it took the disk to serve one write command (DATA pool).
Back End Write Ratio (%)The percent of the back-end IO that were write requests.
Back End Write Request Rate (Operations per Second)The number of write requests each second performed by the disk directors to cache.
Back End Write Throughput (Megabytes per Second)The number of MBs written to the disk from the disk director each second.
Bound Thin VolumeBound Thin Volume of this Thin Pool.
Bound Thin VolumesNumber of Bound Thin Volumes on this Thin Pool.
Compressed Track Ratio (%)The percent of compressed tracks in a virtual pool.
Disabled Data Volume CountNumber Of disabled Data Volumes on this Thin Pool.
Disabled Data VolumesList of disabled Data Volumes of this Thin Pool.
Disk GroupDisk Group that this Thin Pool belongs to.
Disk TechnologyDisk technology of this Thin Pool.
Egress TracksThe number of tracks leaving the pool.
EmulationEmulation of this Thin Pool.
Enabled Data VolumesList of enabled Data Volumes of this Thin Pool.
Enabled Data Volumes CountThe number of enabled Data Volumes on this Thin Pool.
Enabled Pool Capacity (Gigabytes)The capacity of the virtual pool that is enabled.
Enabled Space (Gigabytes)Enabled space on this Thin Pool.
Free Space (Gigabytes)Free space on this Thin Pool.
Ingress TracksThe number of tracks entering the pool.
Maximum Observed Back End Throughput (Megabytes per Second)Maximum Observed Back End Throughput of the Thin Pool.
Maximum Observed Total Back End IO Rate (Operations per Second)Maximum Observed Back End IOPS of the Thin Pool.
ORM Count (Requests per Second)Number of read requests each second performed directly from disks bypassing the cache.
ORM Throughput (Megabytes per Second)Number of host MBs read each second directly from disks bypassing the cache.
Pool IDPool ID of this Thin Pool.
RAIDThe RAID type of this Thin Pool.
RDFS Write Latency (Milliseconds)The average time that it took the Symmetrix RDF/S to serve one write IO for this pool.
Read Cache Miss Latency (Milliseconds)The average time that it took the Symmetrix to serve one read miss IO for this pool.
Subscription Ratio (%)The percent subscription of this Thin Pool.
Symmetrix IdSymmetrix Id of the array this Thin Pool is a part of.
Total Back End IO Rate (Operations per Second)Total Back End IOPS of the Thin Pool.
Total Free (Gigabytes)Total free space of the Thin Pool.
Total Pool Capacity (Gigabytes)The total capacity of the virtual pool.
Total Space (Gigabytes)Total space on this Thin Pool.
Total Subscribed (Gigabytes)Total subscribed of the Thin Pool.
Used Capacity Ratio (%)The percent of the pools capacity that is used.
Used Pool Capacity (Gigabytes)The capacity of the virtual pool that is used.
Used Space (Gigabytes)The used space on this Thin Pool.
Write Cache Miss Latency (Milliseconds)The average time that it took the Symmetrix to serve one write miss IO for this pool.

Thin Tier

NameDescription
Allocated Pool Capacity (Gigabytes)The number of GBs of the virtual pool that are allocated.
Allocated TracksThe total number of tracks of the virtual pool.
Back End IO Latency (Milliseconds)The average time it took the disk to service IO (DATA pool).
Back End IO Throughput (Megabytes per Second)The number of MBs read per second + MBs written per second.
Back End Read Latency (Milliseconds)The average time it took the disk to serve one read command (DATA pool).
Back End Read Ratio (%)The percent of the back-end IO that were read requests.
Back End Read Request Rate (Requests per Second)The number of read requests each second performed by the disk directors to cache.
Back End Read Throughput (Megabytes per Second)The number of MBs read by the disk directors from the disk each second.
Back End Request Latency (Milliseconds)The average time it takes to make a request by the disk directors to cache.
Back End Write Latency (Milliseconds)The average time it took the disk to serve one write command (DATA pool).
Back End Write Ratio (%)The percent of the back-end IO that were write requests.
Back End Write Request Rate (Requests per Second)The number of write requests each second performed by the disk directors to cache.
Back End Write Throughput (Megabytes per Second)The number of MBs written to the disk from the disk director each second.
Compressed Track Ratio (%)The percent of compressed tracks in a virtual pool.
Compressed TracksThe number of compressed tracks of the virtual pool.
Egress TracksThe number of tracks leaving the pool.
Enabled Pool Capacity (Gigabytes)The capacity of the virtual pool that is enabled.
Ingress TracksThe number of tracks entering the pool.
RDFS Write Latency (Milliseconds)The average time that it took the Symmetrix RDF/S to serve one write IO for this pool.
Read Cache Miss Latency (Milliseconds)The average time that it took the Symmetrix to serve one read miss IO for this pool.
Symmetrix IdSymmetrix Id of the array this Thin Tier is a part of.
Tier IDTier ID of this Thin Tier.
Total Back End Request Rate (Requests per Second)The number of read/write requests each second performed by the disk directors to cache.
Total Pool Capacity (Gigabytes)The total capacity of the virtual pool.
Used Capacity Ratio (%)The percent of the pools capacity that is used.
Used Pool Capacity (Gigabytes)The capacity of the virtual pool that is used.
Write Cache Miss Latency (Milliseconds)The average time that it took the Symmetrix to serve one write miss IO for this pool.

Tier

NameDescription
Allocated Pool Capacity (Gigabytes)The number of GBs of the virtual pool that are allocated.
Allocated TracksThe total number of tracks of the virtual pool.
Average Read Size (Kilobytes)The average number of kilobytes for a single read command.
Average Write Size (Kilobytes)The average number of kilobytes for a single write command.
Back End IO Latency (Milliseconds)The average time it took the disk to service IO (DATA pool).
Back End IO Throughput (Megabytes per Second)The number of MBs read per second + MBs written per second.
Back End Read Latency (Milliseconds)The average time it took the disk to serve one read command (DATA pool).
Back End Read Ratio (%)The percent of the back-end IO that were read requests.
Back End Read Request Latency (Milliseconds)The average time it takes to make a request by the disk directors to cache.
Back End Read Request Rate (Requests per Second)The number of read requests each second performed by the disk directors to cache.
Back End Read Throughput (Megabytes per Second)The number of MBs read by the disk directors from the disk each second.
Back End Write Latency (Milliseconds)The average time it took the disk to serve one write command (DATA pool).
Back End Write Ratio (%)The percent of the back-end IO that were write requests.
Back End Write Request Rate (Requests per Second)The number of write requests each second performed by the disk directors to cache.
Back End Write Throughput (Megabytes per Second)The number of MBs written to the disk from the disk director each second.
Compressed Track Ratio (%)The percent of compressed tracks in a virtual pool.
Compressed TracksThe number of compressed tracks of the virtual pool.
Disk Busy Time Ratio (%)The percent of time that the disk is busy serving IOs.
Disk Capacity Used Ratio (%)The percent of the disk capacity that is used.
Disk GroupsNumber of Disk Groups associated with this Tier.
Egress TracksThe number of tracks leaving the pool.
Enabled Pool Capacity (Gigabytes)The capacity of the virtual pool that is enabled.
Excess Space (Gigabytes)Excess space on this Tier.
FAST Free Space (Gigabytes)FAST free space on this Tier.
FAST Usage (Gigabytes)FAST usage of this Tier.
Free Capacity (Gigabytes)Free capacity on this Tier.
Free Disk Capacity Ratio (%)The percent of the disk capacity that is free.
Host Read Rate (Operations per Second)The number of reads per second for the disk.
Host Write Rate (Operations per Second)The number of writes per second for the disk.
Ingress TracksThe number of tracks entering the pool.
IO DensityThe number of BE requests per GB of disk. (Reads + Writes) / total capacity. With FAST moving active extents to higher tiers, this metric is a good indication of success (the IO density on Flash tiers should be higher than the density on SATA tiers.)
IO Latency (Milliseconds)Calculated value: (Total Read Time/sec + Total Write Time/sec) / (Reads/sec + Writes/sec)
IO Rate (Operations per Second)The total number of read and write IOs per second.
IO Throughput (Megabytes per Second)The total MBs read and written per second.
Maximum Storage Group Demand (Gigabytes)Maximum SG demand on this Tier.
Pool Capacity Used Ratio (%)The percent of the pools capacity that is used.
RDFS Write Latency (Milliseconds)The average time that it took the Symmetrix RDF/S to serve one write IO for this pool.
Read Cache Miss Latency (Milliseconds)The average time that it took the Symmetrix to serve one read miss IO for this pool.
Read Latency (Milliseconds)The average time it took the disk to serve one read command.
Read Throughput (Megabytes per Second)The read throughput (MBs) of the disk per second.
Symmetrix IdSymmetrix Id of the array this Tier is a part of.
TechnologyTechnology of this Tier.
Thin Pool CountNumber of Thin Pools on this Tier.
Thin PoolsList of Thin Pools on this Tier.
Tier IDTier ID of this Tier.
Total Back End Request Rate (Requests per Second)The number of read/write requests each second performed by the disk directors to cache.
Total Capacity (Gigabytes)Total capacity of this Tier.
Total Disk Capacity (Gigabytes)The total capacity of the disk in GBs.
Total Pool Capacity (Gigabytes)The total capacity of the virtual pool.
Total SCSI Command Rate (Calls per Second)The total number of read commands, write commands, skip mask commands, verify commands, XOR write commands, and XOR write-read commands performed by the Symmetrix disk each second.
TypeType of this Tier.
Used Capacity (Gigabytes)Used capacity of this Tier.
Used Disk Capacity (Gigabytes)The used capacity of the disk in GBs.
Used Pool Capacity (Gigabytes)The capacity of the virtual pool that is used.
Write Cache Miss Latency (Milliseconds)The average time that it took the Symmetrix to serve one write miss IO for this pool.
Write Latency (Milliseconds)The average time it took the disk to serve one write command.
Write Throughput (Megabytes per Second)The write throughput (MBs) of the disk per second.

Unisphere for VMAX Connection

NameDescription
HostThe Unisphere for VMAX API Host.
VersionThe version of the Unisphere API.

Volume

NameDescription
Allocated Ratio (%)Percent allocated.
Capacity (Megabytes)The capacity of this volume (MB).
Capacity CylindersThe capacity of the volume's cylinders.
EmulationThe volume's emulation.
EncapsulatedWhether or not the volume is encapsulated.
Front End PathsThe number of front end paths on the volume.
IdentifierThe volume identifier.
Physical NameThe physical name of the volume.
PinnedWhether or not the volume is pinned.
ReservedWhether or not the volume is reserved.
SSIDThe SSID associated with the volume.
StatusThe status of the volume.
Storage Group IDAn array of associated storage groups.
Storage GroupsThe number of storage groups associated with the volume.
Symmetrix IdSymmetrix Id of the array this Volume is a part of.
Symmetrix Port KeyAn array of associated symmetrix ports.
TypeThe volume's type.
Used Space (Megabytes)Used space (in megabytes) on the Volume resource.
Volume IDVolume ID of this Volume.
WWNThe volume's WWN

Updated 8 months ago

Dell EMC VMAX


Monitor Dell EMC Enterprise Storage

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