System Administration Commands dsstat(1M)
NAME
dsstat - report Sun StorageTek Availability Suite I/O
statisticsSYNOPSIS
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. OPTIONSThe dsstat supports the following options:
-m mode
Specifies the mode(s) of operation. Valid modes are: cache Cache statistics iiPoint-in-Time Copy statistics
sndr Remote Mirror statisticsTo display statistics for multiple services simultane-
ously, 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 furtherdivided 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 Descriptions," below for descriptions of these fields.SunOS 5.11 Last change: 2 Oct 2007 1
System Administration Commands dsstat(1M)
-r report-options
Specifies the volume components to be displayed. Each item is represented by a single character, and multipleitems 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, oo For the "report-options for sndr
mode": b, no For the "display-options for cache
mode": r, w, d, c, s, fo 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 ofstatistics are represented by a single character; multi-
ple types can be specified.For cache mode, the valid display-options are:
r Detailed read statistics.SunOS 5.11 Last change: 2 Oct 2007 2
System Administration Commands dsstat(1M)
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 modeoptions (-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:
SunOS 5.11 Last change: 2 Oct 2007 3
System Administration Commands dsstat(1M)
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 Mirrorstatistics, the name specified is com-
pared to the Remote Mirror primaryvolume to determine if they match. Addi-
tionally, an Remote Mirror volume should be specified as: where is the primary or secondary host and is the volume name by which that host recognizes the volume set. When specifying 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 thePoint-in-Time Copy shadow volume to
determine if they match.SunOS 5.11 Last change: 2 Oct 2007 4
System Administration Commands dsstat(1M)
-f Output field headers at every reporting
cycle.-F Output field headers once, when report-
ing begins.-z Suppress report lines that have zero
values or no activity. OPERANDSThe 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 avoidthis, 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 DescriptionsUnless otherwise specified, all fields are per-second aver-
ages based on the data collected during the specified inter-
val. name Name of the entity being reported t Volume type s Volume status r Cache read behaviorSunOS 5.11 Last change: 2 Oct 2007 5
System Administration Commands dsstat(1M)
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 intervalSunOS 5.11 Last change: 2 Oct 2007 6
System Administration Commands dsstat(1M)
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
SunOS 5.11 Last change: 2 Oct 2007 7
System Administration Commands dsstat(1M)
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
SunOS 5.11 Last change: 2 Oct 2007 8
System Administration Commands dsstat(1M)
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 statisticsEXAMPLES
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 StatisticsReport master, shadow and bitmap statistics for Point-in-
Time Copy, using default output. Generate reports at two second intervals.SunOS 5.11 Last change: 2 Oct 2007 9
System Administration Commands dsstat(1M)
# 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/statusflags and percentages. Generate reports at two second inter-
vals. 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 statis-
tics. 4 An unknown error has occurred.SunOS 5.11 Last change: 2 Oct 2007 10
System Administration Commands dsstat(1M)
ATTRIBUTES
See attributes(5) for descriptions of the following attri-
butes:____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
| ____________________________|_____________________________|_
| Availability | service/storage/avs/cache- |
| | management, || | service/storage/avs/cache- |
| | management ||_____________________________|_____________________________|
| Interface Stability | Committed ||_____________________________|_____________________________|
SEE ALSO
dscfg(1M), svadm(1M), ds.log(4), rdc.cf(4), attributes(5)SunOS 5.11 Last change: 2 Oct 2007 11