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man page for dsstat

dsstat(1M)						  System Administration Commands						dsstat(1M)

NAME
dsstat - report Sun StorageTek Availability Suite I/O statistics SYNOPSIS
dsstat -m mode [-r report-options] [-d display-options] [-s volume-sets] [-f | -F] [-z] [interval [count]] DESCRIPTION
The dsstat command collects and reports I/O statistics for the Sun StorageTek Availability Suite products. OPTIONS
The dsstat supports the following options: -m mode Specifies the mode(s) of operation. Valid modes are: cache Cache statistics ii Point-in-Time Copy statistics sndr Remote Mirror statistics To display statistics for multiple services simultaneously, use the -m switch to specify each of the modes required. For example: % dsstat -m ii -m sndr % dsstat -m ii -m sndr -m cache To determine which statistics are being reported from which service, use the role field, described below. When cache statistics are requested as one of the multiple services, the rkps and wkps statistics is further divided into crkps, drkps, cwkps, and dwkps. If no -m switch is specified, then dsstat displays default statistics for all of the valid modes as described above. See "Field Descrip- tions," below for descriptions of these fields. -r report-options Specifies the volume components to be displayed. Each item is represented by a single character, and multiple items can be selected. The report-options vary based on the mode(s) specified above. This option is not used for cache mode. Valid report-options for ii mode are: m Master volume statistics. o For the "report-options for ii mode": m, s, b, o o For the "report-options for sndr mode": b, n o For the "display-options for cache mode": r, w, d, c, s, f o For the "display-options for ii mode": r, w, t, s, p, f s Shadow volume statistics. b Bitmap volume statistics. o Overflow volume statistics, if attached. Valid report-options for sndr mode are: b Bitmap volume statistics. n Network volume statistics. -d display-options Specifies the statistics to be displayed. The types of statistics are represented by a single character; multiple types can be speci- fied. For cache mode, the valid display-options are: r Detailed read statistics. w Detailed write statistics. s Summary statistics. f Cache behavior flags. The following display-options are available only for cache mode, they need to be combined with the mode options (-m) d Destaged data statistics. c Write cancellation statistics. The default display-options for cache are sf. For ii mode, the valid display-options are: r Detailed read statistics. w Detailed write statistics. t Timing statistics. s Summary statistics. p Percentage of volume requiring sync. f Volume type/status flags. The default display-options for ii are spf. For sndr mode, the valid display-options are: r Detailed read statistics. w Detailed write statistics. t Timing statistics. s Summary statistics. p Percentage of volume requiring sync. f Volume type/status flags. q Asynchronous queue statistics. The following display-option is only available for sndr mode, and needs to be combined with the mode options (-m). q Asynchronous queue statistics. The default display-options for sndr are spf. Specifying the summary display-option causes r w t display-options to be ignored. -s volume-sets Filters the output to include only the specified volume-sets, where volume-sets is a comma-delimited list of volume names. When displaying Remote Mirror statistics, the name specified is compared to the Remote Mirror primary volume to determine if they match. Additionally, an Remote Mirror volume should be specified as <host>:<volume> where <host> is the primary or secondary host and <volume> is the volume name by which that host recognizes the volume set. When speci- fying multiple Remote Mirror volumes sets, be aware that each volume set specified is evaluated individually, using the rules above. When displaying Point-in-Time Copy statistics, the volume name specified is compared to the Point-in-Time Copy shadow volume to determine if they match. -f Output field headers at every reporting cycle. -F Output field headers once, when reporting begins. -z Suppress report lines that have zero values or no activity. OPERANDS
The dsstat command line supports the following operands: interval Specifies the interval for each report, in seconds. If no interval is specified, a single report with a one second interval is output. Due to the varying number of entries in a given set and the varying number of sets, header information might appear in the middle of a set being reported. To avoid this, use the -f or -F options to display the header information at the desired time. count Specifies the number of reports to generate. If no count is specified, output continues until interrupted. Field Descriptions Unless otherwise specified, all fields are per-second averages based on the data collected during the specified interval. name Name of the entity being reported t Volume type s Volume status r Cache read behavior w Cache write behavior pct Percentage of volume requiring sync role Role of the item being reported tps Total number of reads + writes rtps Number of reads wtps Number of writes kps Total kilobytes read + written rkps Kilobytes read wkps Kilobytes written crkps Kilobytes read from cache drkps Kilobytes read from disk cwkps Kilobytes written to cache dwkps Kilobytes written to disk ckps Kilobytes transferred to or from cache dkps Kilobytes transferred to or from disk svt Service time per operation hit Read hits during interval ds/s Kilobytes destaged from cache cn/s Number of write cancellations q Type of asynchronous queuing being used qi Number of items currently queued qk Kilobytes currently queued qhwi High water mark of queued items qhwk High water mark of queued kilobytes The name field displays only the last 16 characters of the name. Valid cache behaviors for cache are: C Cache reads/writes D Disk reads/writes Valid volume types for ii are: I Independent shadow volume D Dependent shadow volume Valid volume status for ii is: C Copy in progress - No copy in progress Valid volume types for sndr are: P This is the primary host of this volume set S This is the secondary host of this volume set Valid volume status for sndr is: L Changes to this volume are being logged Q Volume are in queuing mode R Replicating changes to secondary SY Synchronization in progress. Sending data. RS Reverse synchronization in progress. Receiving data. SN Synchronization needed RN Reverse synchronization needed VF Volume failed BF Bitmap failed QF Queue failed Valid queue types for sndr are: D Disk-based queuing enabled M Memory-based queuing enabled Volume roles for sndr are: net Network volume statistics bmp Bitmap volume statistics Volume roles for ii are: mst Master volume statistics shd Shadow volume statistics bmp Bitmap volume statistics ovr Overflow volume statistics EXAMPLES
Example 1 Report Cache Statistics The following example shows the display of Report Cache statistics, with detailed breakdowns of read and writes to cache/disk. Reports are generated at five second intervals. Reporting is limited to the set /dev/rdsk/c1t1d0s0. # dsstat -m cache -d rw -s /dev/rdsk/c1t1d0s0 5 - read - - write - name ckps dkps hit ckps dkps hit dev/rdsk/c1t1d0s0 0 0 0.00 0 0 0.00 dev/rdsk/c1t1d0s0 3 2396 0.13 983 763 100.00 dev/rdsk/c1t1d0s0 2399 799 75.00 2815 2686 100.00 dev/rdsk/c1t1d0s0 3200 800 80.00 2755 2908 100.00 dev/rdsk/c1t1d0s0 3999 799 83.33 2809 2868 100.00 dev/rdsk/c1t1d0s0 4800 800 85.71 2867 2931 100.00 Example 2 Report Master, Shadow and Bitmap Statistics Report master, shadow and bitmap statistics for Point-in-Time Copy, using default output. Generate reports at two second intervals. # dsstat -m ii -r msb 2 name t s pct role kps tps svt dev/rdsk/c0t1d0s5 I C 96.15 mst 19921 38 22 dev/rdsk/c0t1d0s6 shd 9960 19 20 dev/rdsk/c0t1d0s7 bmp 39 77 2 dev/rdsk/c0t1d0s5 I C 94.24 mst 19623 38 22 dev/rdsk/c0t1d0s6 shd 9939 19 20 dev/rdsk/c0t1d0s7 bmp 39 77 2 dev/rdsk/c0t1d0s5 I C 92.34 mst 19969 39 22 dev/rdsk/c0t1d0s6 shd 9984 19 20 dev/rdsk/c0t1d0s7 bmp 39 78 2 Example 3 Report Network Statistics for Remote Mirror Report network statistics for Remote Mirror, using detailed read, write statistics. Report includes volume type/status flags and percent- ages. Generate reports at two second intervals. Limit reporting to the set /dev/rdsk/c0t1d0s0. # dsstat -m sndr -r n -d rwpf -s /dev/rdsk/c0t1d0s0 2 name t s pct role rkps rtps wkps wtps dev/rdsk/c0t1d0s0 P L 100.00 sec 0 0 0 0 dev/rdsk/c0t1d0s0 P SY 99.90 sec 0 0 288 9 dev/rdsk/c0t1d0s0 P SY 97.90 sec 0 0 5296 165 dev/rdsk/c0t1d0s0 P SY 95.81 sec 0 0 5184 161 dev/rdsk/c0t1d0s0 P SY 93.81 sec 0 0 5280 164 dev/rdsk/c0t1d0s0 P SY 91.71 sec 0 0 5198 162 EXIT STATUS
The following exit values are returned: 0 Successful completion. 1 Successful completion, no statistics to report. 2 An invalid argument has been encountered. 3 No memory is available to create kstat statistics. 4 An unknown error has occurred. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscmr, SUNWscmu | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ SEE ALSO
dscfg(1M), svadm(1M), ds.log(4), rdc.cf(4), attributes(5) SunOS 5.11 2 Oct 2007 dsstat(1M)

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