Windows Knowledge Base

[IBM SVC] How to run performance review using SVC CLI Scripts

Business Value of Solution: Quick response time in situations where SVC performance utilization needs to be assessed.

1. Log on to the cluster (to the config node), using ssh.
2. In case statistic files are already available, continue with step 4.

3. Run 'svctask startstats -interval 15' (for a 15 minute interval, possible values range from 1-60). Wait until enough data has been collected. If necessary stop recording of statistics, using 'svctask stopstats'.
4. Pull the per-node stats files off the cluster onto an AIX/Linux host, using 'scp -i <idfile> admin@<svc_ip>:/dumps/iostats/Nn* .'
5. Run the script 'node_stats'. (Which must reside in the same directory as the Nn* files, along with the script 'node_conv'.)

Currently, the script outputs only these values per node:
CPU load (per cluster)
Read ops/s
Write ops/s
Read Data KB/s
Write Data KB/s
which should be fair enough to get a very first impression of that SVC's performance utilization...

Here is a sample output:
# ./node_stats 15

output: time;cpu;nid;rops;wops;rb;wb (rb+wb in KB/s)
2008-12-05 10:50:02;5;0x000000000000008b;0;0;0;0
2008-12-05 11:05:04;5;0x000000000000008b;0;0;0;0
2008-12-05 11:20:06;5;0x000000000000008b;0;0;0;0
2008-12-05 11:35:09;5;0x000000000000008b;0;0;0;0
2008-12-05 11:50:11;6;0x000000000000008b;0;0;0;0
2008-12-05 12:05:13;6;0x000000000000008b;0;0;0;0
2008-12-05 12:20:15;6;0x000000000000008b;0;0;0;0
2008-12-05 12:35:17;5;0x000000000000008b;0;0;0;0
2008-12-05 12:50:20;5;0x000000000000008b;0;0;0;0
2008-12-05 13:05:22;5;0x000000000000008b;0;0;0;0
2008-12-05 13:20:24;5;0x000000000000008b;0;0;0;0
2008-12-05 13:35:26;5;0x000000000000008b;0;0;0;0
2008-12-05 13:50:28;6;0x000000000000008b;0;0;0;0
2008-12-05 14:05:30;6;0x000000000000008b;0;0;0;0
2008-12-05 14:20:33;5;0x000000000000008b;0;0;0;0

output: time;cpu;nid;rops;wops;rb;wb (rb+wb in KB/s)
2008-12-05 10:50:02;5;0x000000000000008d;863;863;3160;1958
2008-12-05 11:05:04;5;0x000000000000008d;856;856;3220;1857
2008-12-05 11:20:06;5;0x000000000000008d;868;868;3314;1898
2008-12-05 11:35:09;5;0x000000000000008d;857;857;3158;1961
2008-12-05 11:50:11;6;0x000000000000008d;864;864;3120;1952
2008-12-05 12:05:13;6;0x000000000000008d;865;865;3118;2044
2008-12-05 12:20:15;6;0x000000000000008d;861;861;3113;2009
2008-12-05 12:35:17;5;0x000000000000008d;846;846;3173;1838
2008-12-05 12:50:20;5;0x000000000000008d;862;862;3182;1981
2008-12-05 13:05:22;5;0x000000000000008d;869;869;3208;1990
2008-12-05 13:20:24;5;0x000000000000008d;858;858;3131;1909
2008-12-05 13:35:26;5;0x000000000000008d;855;855;3227;1864
2008-12-05 13:50:28;6;0x000000000000008d;865;865;3142;2040
2008-12-05 14:05:30;6;0x000000000000008d;864;864;3100;2030
2008-12-05 14:20:33;5;0x000000000000008d;857;857;3086;1960