ESS Statistics Report

The ESS Statistics Report displays the adapters and their I/O activity for each Enterprise Storage Server (ESS) that is connected to the system.

The statistics are kept inside the hardware and, as a result, include I/O activity from all connected systems.

The ESS Statistics Report is produced by using the ESS Analyzer control statement. The data is obtained by using the CACHE Extractor control statement, specifying RECORDS=ESS or RECORDS=ALL.

Related topics

CACHE
ESS
Analyzer-reports

A sample ESS Statistics Report is shown in the following figure:

PRODUCED BY CMF ANALYZER (v.r.mm RSL yymm )                       ESS STATISTICS REPORT                           RPTSEQ     3 PAGE      6
BMC SOFTWARE, INC.                                        BMC SOFTWARE, INC.                            REPORT DATE: DD MMM YY 11.49
ACTL 22 SEP YY 12.22.57 22 SEP YY 18.44.26                   HOUSTON, TX.                              SYSTEM ID: S0W1     Z v.rr.n

BASED ON REC TYPE/# RECS/# SAMPLES/REC HOURS: 74-8/15/5/1.05
------------------------------------ ESS SERIAL NUMBER: 00000AMAA1   TYPE-MODEL: 002107-921 ----------------------------------------

------------------------------------------------ ESS LINK STATISTICS SECTION --------------------------------------------------

----- ADAPTER -----   LINK TYPE          BYTES      BYTES PER    OPERATIONS     RESP TIME        I/O
ID   TYPE                              PER SEC     OPERATION      PER SEC     /OPERATION     INTENSITY

0030 FIBRE 2Gb      ECKD READ         632,963           854         741.1             0          12.8
                      ECKD WRITE        111,891         2,815          39.7             0           2.0
                                        -------       -------       -------       -------       -------
                      SUMMARY           744,854           954         780.9             0          14.7

0031 FIBRE 2Gb      ECKD READ           8,964         1,981           4.5             0           0.1
                      ECKD WRITE          2,596         1,579           1.6           0.1           0.1
                                        -------       -------       -------       -------       -------
                      SUMMARY            11,559         1,874           6.2             0           0.3

0100 FIBRE 2Gb      ECKD READ         620,988           843         736.8             0          12.8
                      ECKD WRITE        106,319         2,867          37.1             0           1.8
                                        -------       -------       -------       -------       -------
                      SUMMARY           727,307           940         773.9             0          14.6

0101 FIBRE 2Gb      ECKD READ         774,583         2,582         300.0             0           8.1
                      ECKD WRITE        227,623         1,680         135.5             0           4.7
                                        -------       -------       -------       -------       -------
                      SUMMARY            1,002K         2,301         435.5             0          12.8

0230 FIBRE 2Gb      ECKD READ         626,560           854         733.5             0          12.6
                      ECKD WRITE        117,151         2,904          40.3             0           1.9
                                        -------       -------       -------       -------       -------
                      SUMMARY           743,711           961         773.8             0          14.6

0300 FIBRE 2Gb      ECKD READ         790,745         2,526         313.0             0           8.2
                      ECKD WRITE        226,689         1,748         129.7             0           4.6
                                        -------       -------       -------       -------       -------
                      SUMMARY            1,017K         2,298         442.7             0          12.8

------------------------------------------------ ESS EXTENT POOL STATISTICS SECTION ------------------------------------------------

--- EXTENT POOL ---    ------- REAL EXTENTS -------
  ID   ---- TYPE ---    CAPACITY    EXTENT     ALLOC
                        (GBYTES)     COUNT   EXTENTS

0000 CKD    1Gb          1,560     1,771     1,771

0001 CKD    1Gb          1,560     1,771     1,771

---------------------------------------------------- ESS RANK STATISTICS SECTION ---------------------------------------------------

                      RAID   ------ READ OPERATIONS -------     ------ WRITE OPERATIONS ------     --------- RANK ATTRIBUTES -------
--- EXTENT POOL ---   RANK      OPS   RTIME   BYTES   BYTES        OPS   RTIME   BYTES   BYTES     --ARRAY-- MIN    CAP    - RAID -
ID   ---- TYPE ---    ID      /SEC     /OP    /SEC     /OP       /SEC     /OP    /SEC     /OP     NUM WDTH RPM GBYTES     TYPE

0000 CKD    1Gb      0000   1.6722 0.0065 68,110 40,731     2.4952 0.0165 763.6K    306K      1      6 N/A     1,800 RAID 5

0001 CKD    1Gb      0001   0.0045 0.0216   207.7 46,261     0.1909 0.1569 11,906 62,363      1      6 N/A     1,800 RAID 5

0002 CKD    1Gb      0002   0.0005 0.0080       0       0     0.0747 0.0185   519.1   6,947      1      6 N/A     1,800 RAID 5

0003 CKD    1Gb      0003   0.0404 0.0120   2,111 52,258     0.0275 0.2380   242.3   8,822      1      6 N/A     1,800 RAID 5

----------------------------------------------- ESS SYNCHRONOUS I/O LINK STATISTICS ------------------------------------------------

                             ------ READ OPERATIONS ------ ----- WRITE OPERATIONS ------   --- NVS WRITE OPERATIONS ----
     ----- LINK DESC -----      OPS   RTIME   BYTES      %    OPS    RTIME   BYTES      %      OPS   RTIME    BYTES     %
SSID --- TYPE --- GEN WD     /SEC     /OP     /OP   SUCC   /SEC      /OP    /SEC   SUCC     /SEC     /OP     /SEC SUCC
0080 Optical PCIe    3   8   848.90 9.7000   4,096   99.5      0        0       0      0        0       0        0     0
0081 Optical PCIe    1   0   NO DATA OR ALL DATA IS ZERO
0180 Optical PCIe    1   0   NO DATA OR ALL DATA IS ZERO
0181 Optical PCIe    1   0   NO DATA OR ALL DATA IS ZERO
0280 Optical PCIe    3   8   NO DATA OR ALL DATA IS ZERO
0281 Optical PCIe    1   0   NO DATA OR ALL DATA IS ZERO
0380 Optical PCIe    1   0   NO DATA OR ALL DATA IS ZERO
0381 Optical PCIe    1   0   NO DATA OR ALL DATA IS ZERO

ESS Statistics Report field descriptions

The table below describes each field in the ESS Statistics Report.

Field	Description
ESS SERIAL NUMBER	serial number of the primary control unit
TYPE-MODEL	type and model of the primary control unit
ESS Link Statistics Section Important z/OS does not return any statistics to CMF for ESCON adapters that are connected to Enterprise Storage Servers (ESS). As a result, no ESCON adapters can appear in this section.
ADAPTER	ID—adapter ID TYPE—adapter type and link speed; for example, FIBRE 2Gb Important ??? is displayed if type is unknown.
LINK TYPE	type of I/O handled by the adapter: ECKD—extended count key data (statistics not available for 2105 ESS model) PPRC—Peer-to-Peer Remote Copy SCSI—small computer system interface Important CMF cannot identify link type if there is no activity; in this case, NO DATA OR ALL DATA IS ZERO is displayed. The SUMMARY line displays the summary of activity in both directions (read and write or send and receive).
OPERATIONS PER SEC	average number of operations completed per second; the meaning of operation depends on the link type: ECKD—one count per command PPRC—one count per command SCSI—one count per read or write
RESP TIME/OPERATION	average response time per operation, in milliseconds
BYTES PER SEC	average number of bytes transferred per second
BYTES PER OPERATION	average number of bytes transferred per operation
I/O INTENSITY	measurement of how busy a link or adapter is I/O INTENSITY is the response time of all operations divided by elapsed time and measured in milliseconds/second. Because a FICON channel can carry concurrent operations, it is possible for this value to exceed 1000.
ESS Extent Pool Statistics Section
EXTENT POOL	pool of allocation units for logical volumes: ID—extent pool identifier TYPE:—extent pool type, for example, FIBRE 1 Gb or CKD 1 Gb
CAPACITY (GBYTES)	capacity, in gigabytes, of physical storage for real extents in the extent pool; the available capacity for the operating system
EXTENT COUNT	number of extents defined in an extent pool; a discrete number of extents can be used to create volumes
ALLOC EXTENTS	number of extents allocated from the extent pool
ESS Rank Statistics Section
EXTENT POOL	pool of allocation units for logical volumes: ID—extent pool identifier TYPE—extent pool type, for example, FIBRE 1 Gb or CKD 1 Gb
RAID RANK ID	RAID rank identifiers in the extent pool Important If RAID RANK ID=POOL, that line represents a summary of all rank values of the entire extent pool. If the EXTENT POOL has only one RAID rank, no summary (POOL) line is generated.
READ OPERATIONS	summary of read operations: OPS/SEC—number of read operations per second RTIME/OP—average response time of read operations in milliseconds BYTES/SEC—average number of bytes read per second BYTES/OP—average number of bytes per read operation
WRITE OPERATIONS	summary of write operations: OPS/SEC—number of read operations per second RTIME/OP—average response time of read operations in milliseconds BYTES/SEC—average number of bytes read per second BYTES/OP—average number of bytes per read operation
ARRAY	NUM—number of arrays on the rank WDTH—sum of disk drive modules (DDMs) of a rank, excluding spares of the rank Example For a RAID-5 array with 6 data disks and 1 parity disk, ARRAY WDTH is 7; for a RAID-10 with 3 mirrored disks, ARRAY WDTH is 6.
MIN RPM	slowest drive of the rank in units of 1000 RPM (revolutions per minute)
RANK CAP	sum of bytes of a rank
RAID TYPE	RAID type found for the rank, for example, RAID-5 or RAID-10 Important In the line displaying the average values for the entire extent pool (where RRID=POOL), 'MIXED' is shown if different RAID types have been encountered for the individual ranks in the extent pool.
ESS Synchronous I/O Link Statistics Section
LINK DESC	Type—Link type GEN—Generation to denote link speed WD—Number of PCIe lanes. This value is applicable for recent generations. For older generations, zero is displayed.
READ OPERATIONS	OPS/SEC—Average number of operations completed per second RTIME/OP—Average response time per operation in milliseconds BYTES/OP—Average number of operations completed per second % SUCC—Percentage of operations that completed successfully
WRITE OPERATIONS	OPS/SEC—Average number of operations completed per second RTIME/OP—Average response time per operation in milliseconds BYTES/OP—Average number of operations completed per second % SUCC—Percentage of operations that completed successfully
NVS OPERATIONS	OPS/SEC—Average number of operations completed per second RTIME/OP—Average response time per operation in milliseconds BYTES/OP—Average number of operations completed per second % SUCC—Percentage of operations that completed successfully

ESS Statistics Report

ESS Statistics Report field descriptions

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