Silicon Graphics InfiniteStorage 6120, User Manual

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Performance Management
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3.3 Performance Management
Initialization and rebuild operations are background processes and their rates can be adjusted to
minimize their impact on system performance.
3.3.1 Background Job Priority
To monitor all current jobs
(Figure 69)
, enter this command:
SHOW JOB * ALL_ATTRIBUTES
The type of job and percentage of completion are displayed.
You may specify the amount of system resources that should be devoted to a background job. The
higher its priority value, the faster the background job will run and the more the background job will
impact client I/O performance.
To set the job priority, enter this command:
SET JOB=<id> PRIORITY=<priority>
where <priority> is a number between 1 and 99. Note that
PRIORITY
is not a percentage or a
mathematical fraction of the available resources. For example, two background jobs with priority
values of 50 will not use 100% of the system resources. The InfiniteStorage 6120 may or may not
limit the number of background jobs to keep the total of their priorities below 100.
Pause/Resume a Job
You may pause a job at any time using the
PAUSE JOB=<id>
command
(Figure 70)
.
To resume the job, enter command
RESUME JOB=<id>
Figure 69. Show Job Example Screen
RAID$ show job * all
OID: 0x2b010003
Target: 0x19b40003
Type: REBUILD
Status: RUNNING
Priority: 80
Fraction Complete:5%
OID: 0x28000004
Target: 0x19b60004
Type: INITIALIZE
Status: RUNNING
Priority: 50
Fraction Complete:10%
Figure 70. Pause/Resume a Job
RAID$ pause job 0x28000003
JOB 3 OID=0x28000003 paused with STATUS='Janus Success' (0x0)
RAID$ show job * all_attributes
OID: 0x28000003
Target: 0x19b40003
Type: INITIALIZE
Status: PAUSED
Priority: 50
Fraction Complete:11%
RAID$ resume job 0x28000003
JOB 3 OID=0x28000003 resumed with STATUS='Janus Success' (0x0)
RAID$ show job * all_attributes
OID: 0x28000003
Target: 0x19b40003
Type: INITIALIZE
Status: RUNNING
Priority: 50
Fraction Complete:11%