SG by FE port by SG metrics

Table 1. SG by FE port by SG metrics
Metric	Description
% Hit	The percentage of I/O operations that were immediately satisfied from cache
% Miss	The percentage of I/O operations that were misses
% PowerPath Observed Relative RT	The percentage of PowerPath Observed Relative RT
% Random IO	The percent of I/O operations that were random.
% Random Read Hit	Calculated value: 100 * (random read hits per sec/total I/O operations per sec)
% Random Read Miss	Calculated value: 100 * (random read misses per sec/total I/O operations per sec)
% Random Reads	The percent of all read I/Os that were random.
% Random Write Hit	Calculated value: 100 * (random write hits per sec/total I/O operations per sec)
% Random Write Miss	Calculated value: 100 * (random write misses per sec/total I/O operations per sec)
% Random Writes	The percent of all write I/O operations per second that were random
% Read Hit	The percent of read operations, performed by the group, that were immediately satisfied by cache
% Read Miss	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
% Reads	The percent of I/O operations that were reads
% Seq Read	Calculated value: 100 * (seq reads per sec/total I/Os per sec)
% Seq Read Hit	The percent of the sequential read operations that were immediately satisfied from cache
% Seq Read Miss	The percent of the sequential read operations that were misses
% Seq Write Hit	The percent of the sequential write operations that were immediately satisfied from cache
% Seq Write Miss	The percent of the sequential write operations that were misses
% Seq Writes	Calculated value: 100*(seq writes per sec/total I/Os per sec)
% Sequential IO	The percent of I/O operations that were sequential
% Virtual Provisioning Space Saved	Percentage of virtual provisioning space saved
% Write Hit	The percent of write operations, performed by the group, that were immediately satisfied by cache.
% Write Miss	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.
% Writes	The percent of I/O operations that were writes
Allocated Capacity	Allocated Capacity
Async Throughput Sent	The number of async MBs sent per second using this storage group
Async Write Reqs/sec	The number of async write requests managed by this storage group per second
Avg IO Size	Calculated value: (HA Kbytes transferred per sec /total I/Os per sec)
Avg QOS Delay Per IO	Delay induced by service level management. Calculated value: (Delayed I/O Time /Delayed I/O Count /1000) (applies only to storage systems running PowerMaxOS 5878 or later)
Avg Read Size	Calculated value: (Kbytes read per sec/total reads per sec)
Avg Write Size	Calculated value: (Kbytes written per sec/total writes per sec)
Avg. Write Paced Delay (ms)	Average write paced delay (V3)
BE % Reads	The percent of the back-end I/O that were read requests
BE % Writes	The percent of the back-end I/O that were write requests
BE Optimize Write Throughput	Internal metric
BE Partial Sector Writes (KB)	The KBs of back-end I/O that were partial sector writes (V3)
BE Prefetched Throughput	The number of tracks per second prefetched from disk to cache upon detection of a sequential read stream
BE Prefetched Tracks	Total prefetched tracks each second from the disk directors to the cache
BE Prefetched Tracks Used	The number of prefetched tracks used each second from the disk directors to the cache
BE RDF Copy Throughput	Internal metric
BE RDF Copy/sec	Internal metric
BE Read Reqs/sec	The number of read requests each second performed by the disk directors to cache
BE Read Throughput For Copy	BE Read Throughput For Copy
BE Reads For Copy/sec	Internal metric
BE Reqs/sec	The number of read/write requests each second performed by the disk directors to cache
BE Throughput Read	BE Throughput Read
BE Throughput Written	BE Throughput Written
BE Throughput Written For Copy	BE Throughput Written For Copy
BE Transferred Throughput	BE Transferred Throughput
BE Write Reqs/sec	The number of write requests each second performed by the disk directors to cache.
BE Write Throughput For Rebuild	BE Write Throughput For Rebuild
BE Writes For Copy/sec	Internal metric
BE Writes For Rebuild/sec	Internal metric
Compression Ratio	Compression ratio
Critical Alert Count	Number of critical alerts
Device Block Size	The block size of the volume
Host Hits/sec	The number of host read/write operations performed each second by the group that were immediately satisfied from cache.
Host IO Limit % Time Exceeded	Host I/O Limit percentage time exceeded (V4)
Host IO Limit Exceeded Time	The number of I/O operations per second the FE port is performing on behalf of the specific storage group
Host IO Limit IOs/sec	The number of I/O operations per second the FE port is processing on behalf of the specific storage group
Host IO Limit Throughput	The number of MBs the FE port is processing on behalf of the specific storage group
Host IOs/sec	The number of host operations performed each second by the group
Host Misses/sec	The number of host read/write operations performed each second by the group that could not be satisfied from cache
Host Read Hits/sec	The number of host read operations performed each second by the group that were immediately satisfied from cache
Host Read Misses/sec	The number of host read operations performed each second by the group that were not satisfied from cache
Host Reads/sec	The number of host read operations performed each second by the group
Host Throughput	The cumulative number of host MBs read/writes per second by the group
Host Throughput Read	The cumulative number of host MBs read per second by the group
Host Throughput Written	The cumulative number of host MBs written per second by the group
Host Write Hits/sec	The number of host write operations performed each second by the group that were immediately satisfied from cache
Host Write Misses/sec	The number of host write operations performed each second by the group that were not satisfied from cache
Host Writes/sec	The number of host write operations performed each second by the group
Information Alert Count	Number of information alerts
IO Density	The number of BE requests per GB of disk
Max WP Threshold	The maximum number of write-pending slots available for the group
PowerPath Average Response Time	The average response time in milliseconds using PowerPath metrics
PowerPath Observed Delta RT	The difference between PowerPath average response time and device/storage group response time
PowerPath Read Response Time	The read response time from the perspective of PowerPath
PowerPath Write Response Time	The write response time from the perspective of PowerPath
Random IOs/sec	I/O operations per second from a host that is not identified as part of a sequential stream
Random Read Hits/sec	Random read I/O operations per second that were satisfied from the cache
Random Read Misses/sec	Random read I/O operations per second that were misses
Random Reads/sec	Read I/O commands from a host that is not identified as part of a sequential stream
Random Write Hits/sec	Random write I/O operations per second that were immediately placed in cache because space was available
Random Write Misses/sec	Random write I/O operations per second that were misses
Random Writes/sec	Write I/O commands from a host that is not identified as part of a sequential stream
RDF Reads/sec	SRDF reads per second
RDF Response Time	The SRDF round-trip time - the metric is calculated as follows : SRDF Accumulated Service Time / (SRDF Reads/sec + SRDF Writes/sec) rolled up from the SRDF devices in the group
RDF Rewrites/sec	SRDF rewrites per second
RDF Throughput Read	SRDF MBs read per second
RDF Throughput Written	SRDF MBs written per second
RDF Writes/sec	SRDF writes per second
RDF/S Write RT	A summary of the read, write, and average response times for the selected SRDF/S group
Read Miss RT	The average time that it took the storage to serve one read miss I/O for this group
Read RT	The calculated average read response time
Read RT 14 to 32	Read RT 14—32
Read RT Count 0 to 1	Read RT Count 0—1
Read RT Count 1 to 3	Read RT Count 1—3
Read RT Count 14 to 32	Read RT Count 14—32
Read RT Count 3 to 5	Read RT Count 3—5
Read RT Count 5 to 8	Read RT Count 5—8
Read RT Count 8 to 14	Read RT Count 8—14
Read RT Count Over 32	Read RT Count Over 32
Read RT Over 32	Read RT Over 32
Response Time	The calculated average response time
Seq IOs/sec	The number of I/O operations performed each second that were sequential (V4)
Seq Read Hits/sec	The number of sequential read operations performed each second by the group that were immediately satisfied from cache (V4)
Seq Read Miss/sec	The number of sequential read operations performed each second by the group that were misses (V4)
Seq Reads/sec	The number of read I/O operations performed each second that were sequential (V4)
Seq Write Hits/sec	The number of sequential write operations performed each second by the group that were immediately satisfied from cache (V4)
Seq Write Misses/sec	The number of sequential write operations performed each second by the group that were misses
Seq Writes/sec	The number of write I/O operations performed each second that were sequential
Skew	Skew (V3)
Sync Throughput Sent	The number of sync MBs sent per second using this storage group
Sync Write Reqs/sec	The number of sync write requests managed by this storage group per second
Total Capacity	Total capacity
Total Response Time	Response time including VAAI commands - not available for MAX aggregate type
Total Tracks	The total number of tracks for the storage group
VAAI Total Command Count	Number of VAAI commands issued.
VAAI Total Time	VAAI Total Time (V4)
VAAI Unmap Command Count	Number of VAAI unmap commands that were issued
VAAI Unmap MB	VAAI Unmap (MB) (V3)
VAAI Unmap Throughput	VAAI Unmap Throughput
VAAI Write Same Command Count	Number of VAAI write same commands that were issued
VAAI Write Same MB	VAAI Write Same (MB) (V3)
VAAI Write Same Throughput	VAAI Write Same Throughput
VAAI XCopy Command Count	Number of VAAI XCopy commands that were issued
VAAI XCopy MB	VAAI XCopy (MB) (V3)
VAAI XCopy Throughput	VAAI XCopy Throughput
Warning Alert Count	Number of warning alerts
WP Count	The number of tracks currently in write pending mode for the group
WP Used Capacity	WP used capacity
Write Miss RT	The average time that it took the storage to serve one write miss I/O for this group.
Write paced delay	Write paced delay (V3)
Write RT	The calculated average write response time
Write RT 14 to 32	Write RT 14—32
Write RT Count 0 to 1	Write RT Count 0—1
Write RT Count 1 to 3	Write RT Count 1—3
Write RT Count 14 to 32	Write RT Count 14—32
Write RT Count 3 to 5	Write RT Count 14—32
Write RT Count 5 to 8	Write RT Count 5—8
Write RT Count 8 to 14	Write RT Count 8—14.
Write RT Count Over 32	Write RT Count Over 32
Write RT Over 32	Write RT Over 32

% Hit

The percentage of I/O operations that were immediately satisfied from cache

% Miss

The percentage of I/O operations that were misses

% PowerPath Observed Relative RT

The percentage of PowerPath Observed Relative RT

% Random IO

The percent of I/O operations that were random.

% Random Read Hit

Calculated value: 100 * (random read hits per sec/total I/O operations per sec)

% Random Read Miss

Calculated value: 100 * (random read misses per sec/total I/O operations per sec)

% Random Reads

The percent of all read I/Os that were random.

% Random Write Hit

Calculated value: 100 * (random write hits per sec/total I/O operations per sec)

% Random Write Miss

Calculated value: 100 * (random write misses per sec/total I/O operations per sec)

% Random Writes

The percent of all write I/O operations per second that were random

% Read Hit

The percent of read operations, performed by the group, that were immediately satisfied by cache

% Read Miss

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

% Reads

The percent of I/O operations that were reads

% Seq Read

Calculated value: 100 * (seq reads per sec/total I/Os per sec)

% Seq Read Hit

The percent of the sequential read operations that were immediately satisfied from cache

% Seq Read Miss

The percent of the sequential read operations that were misses

% Seq Write Hit

The percent of the sequential write operations that were immediately satisfied from cache

% Seq Write Miss

The percent of the sequential write operations that were misses

% Seq Writes

Calculated value: 100*(seq writes per sec/total I/Os per sec)

% Sequential IO

The percent of I/O operations that were sequential

% Virtual Provisioning Space Saved

Percentage of virtual provisioning space saved

% Write Hit

The percent of write operations, performed by the group, that were immediately satisfied by cache.

% Write Miss

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.

% Writes

The percent of I/O operations that were writes

Allocated Capacity

Async Throughput Sent

The number of async MBs sent per second using this storage group

Async Write Reqs/sec

The number of async write requests managed by this storage group per second

Avg IO Size

Calculated value: (HA Kbytes transferred per sec /total I/Os per sec)

Avg QOS Delay Per IO

Delay induced by service level management. Calculated value: (Delayed I/O Time /Delayed I/O Count /1000) (applies only to storage systems running PowerMaxOS 5878 or later)

Avg Read Size

Calculated value: (Kbytes read per sec/total reads per sec)

Avg Write Size

Calculated value: (Kbytes written per sec/total writes per sec)

Avg. Write Paced Delay (ms)

Average write paced delay (V3)

BE % Reads

The percent of the back-end I/O that were read requests

BE % Writes

The percent of the back-end I/O that were write requests

BE Optimize Write Throughput

Internal metric

BE Partial Sector Writes (KB)

The KBs of back-end I/O that were partial sector writes (V3)

BE Prefetched Throughput

The number of tracks per second prefetched from disk to cache upon detection of a sequential read stream

BE Prefetched Tracks

Total prefetched tracks each second from the disk directors to the cache

BE Prefetched Tracks Used

The number of prefetched tracks used each second from the disk directors to the cache

BE RDF Copy Throughput

Internal metric

BE RDF Copy/sec

Internal metric

BE Read Reqs/sec

The number of read requests each second performed by the disk directors to cache

BE Read Throughput For Copy

BE Reads For Copy/sec

Internal metric

BE Reqs/sec

The number of read/write requests each second performed by the disk directors to cache

BE Throughput Read

BE Throughput Written

BE Throughput Written For Copy

BE Transferred Throughput

BE Write Reqs/sec

The number of write requests each second performed by the disk directors to cache.

BE Write Throughput For Rebuild

BE Writes For Copy/sec

Internal metric

BE Writes For Rebuild/sec

Internal metric

Compression Ratio

Compression ratio

Critical Alert Count

Number of critical alerts

Device Block Size

The block size of the volume

Host Hits/sec

The number of host read/write operations performed each second by the group that were immediately satisfied from cache.

Host IO Limit % Time Exceeded

Host I/O Limit percentage time exceeded (V4)

Host IO Limit Exceeded Time

The number of I/O operations per second the FE port is performing on behalf of the specific storage group

Host IO Limit IOs/sec

The number of I/O operations per second the FE port is processing on behalf of the specific storage group

Host IO Limit Throughput

The number of MBs the FE port is processing on behalf of the specific storage group

Host IOs/sec

The number of host operations performed each second by the group

Host Misses/sec

The number of host read/write operations performed each second by the group that could not be satisfied from cache

Host Read Hits/sec

The number of host read operations performed each second by the group that were immediately satisfied from cache

Host Read Misses/sec

The number of host read operations performed each second by the group that were not satisfied from cache

Host Reads/sec

The number of host read operations performed each second by the group

Host Throughput

The cumulative number of host MBs read/writes per second by the group

Host Throughput Read

The cumulative number of host MBs read per second by the group

Host Throughput Written

The cumulative number of host MBs written per second by the group

Host Write Hits/sec

The number of host write operations performed each second by the group that were immediately satisfied from cache

Host Write Misses/sec

The number of host write operations performed each second by the group that were not satisfied from cache

Host Writes/sec

The number of host write operations performed each second by the group

Information Alert Count

Number of information alerts

IO Density

The number of BE requests per GB of disk

Max WP Threshold

The maximum number of write-pending slots available for the group

PowerPath Average Response Time

The average response time in milliseconds using PowerPath metrics

PowerPath Observed Delta RT

The difference between PowerPath average response time and device/storage group response time

PowerPath Read Response Time

The read response time from the perspective of PowerPath

PowerPath Write Response Time

The write response time from the perspective of PowerPath

Random IOs/sec

I/O operations per second from a host that is not identified as part of a sequential stream

Random Read Hits/sec

Random read I/O operations per second that were satisfied from the cache

Random Read Misses/sec

Random read I/O operations per second that were misses

Random Reads/sec

Read I/O commands from a host that is not identified as part of a sequential stream

Random Write Hits/sec

Random write I/O operations per second that were immediately placed in cache because space was available

Random Write Misses/sec

Random write I/O operations per second that were misses

Random Writes/sec

Write I/O commands from a host that is not identified as part of a sequential stream

RDF Reads/sec

SRDF reads per second

RDF Response Time

The SRDF round-trip time - the metric is calculated as follows : SRDF Accumulated Service Time / (SRDF Reads/sec + SRDF Writes/sec) rolled up from the SRDF devices in the group

RDF Rewrites/sec

SRDF rewrites per second

RDF Throughput Read

SRDF MBs read per second

RDF Throughput Written

SRDF MBs written per second

RDF Writes/sec

SRDF writes per second

RDF/S Write RT

A summary of the read, write, and average response times for the selected SRDF/S group

Read Miss RT

The average time that it took the storage to serve one read miss I/O for this group

Read RT

The calculated average read response time

Read RT 14 to 32

Read RT 14—32

Read RT Count 0 to 1

Read RT Count 0—1

Read RT Count 1 to 3

Read RT Count 1—3

Read RT Count 14 to 32

Read RT Count 14—32

Read RT Count 3 to 5

Read RT Count 3—5

Read RT Count 5 to 8

Read RT Count 5—8

Read RT Count 8 to 14

Read RT Count 8—14

Read RT Count Over 32

Read RT Over 32

Response Time

The calculated average response time

Seq IOs/sec

The number of I/O operations performed each second that were sequential (V4)

Seq Read Hits/sec

The number of sequential read operations performed each second by the group that were immediately satisfied from cache (V4)

Seq Read Miss/sec

The number of sequential read operations performed each second by the group that were misses (V4)

Seq Reads/sec

The number of read I/O operations performed each second that were sequential (V4)

Seq Write Hits/sec

The number of sequential write operations performed each second by the group that were immediately satisfied from cache (V4)

Seq Write Misses/sec

The number of sequential write operations performed each second by the group that were misses

Seq Writes/sec

The number of write I/O operations performed each second that were sequential

Skew

Skew (V3)

Sync Throughput Sent

The number of sync MBs sent per second using this storage group

Sync Write Reqs/sec

The number of sync write requests managed by this storage group per second

Total Capacity

Total capacity

Total Response Time

Response time including VAAI commands - not available for MAX aggregate type

Total Tracks

The total number of tracks for the storage group

VAAI Total Command Count

Number of VAAI commands issued.

VAAI Total Time

VAAI Total Time (V4)

VAAI Unmap Command Count

Number of VAAI unmap commands that were issued

VAAI Unmap MB

VAAI Unmap (MB) (V3)

VAAI Unmap Throughput

VAAI Write Same Command Count

Number of VAAI write same commands that were issued

VAAI Write Same MB

VAAI Write Same (MB) (V3)

VAAI Write Same Throughput

VAAI XCopy Command Count

Number of VAAI XCopy commands that were issued

VAAI XCopy MB

VAAI XCopy (MB) (V3)

VAAI XCopy Throughput

Warning Alert Count

Number of warning alerts

WP Count

The number of tracks currently in write pending mode for the group

WP Used Capacity

WP used capacity

Write Miss RT

The average time that it took the storage to serve one write miss I/O for this group.

Write paced delay

Write paced delay (V3)

Write RT

The calculated average write response time

Write RT 14 to 32

Write RT 14—32

Write RT Count 0 to 1

Write RT Count 0—1

Write RT Count 1 to 3

Write RT Count 1—3

Write RT Count 14 to 32

Write RT Count 14—32

Write RT Count 3 to 5

Write RT Count 14—32

Write RT Count 5 to 8

Write RT Count 5—8

Write RT Count 8 to 14

Write RT Count 8—14.

Write RT Count Over 32

Write RT Over 32