Download DDN SFA10000 (SFA OS V1.4.0) User Guide

Performance Management
3.10.4
Background Job Priority
Initialization and rebuild operations are background processes and their rates can be
adjusted to minimize their impact on system performance.
To display the list of current jobs, enter command:
SHOW JOB *
The type of job and percentage of completion are displayed (Figure 93).
Figure 93. Show Job Example Screen (1)
***************************
*
Background Jobs
*
***************************
|Fraction|
Idx|Type
|Target
(Sub)
|State
|Complete|Priority|Status
|Time
-------------------------------------------------------------------------------------0 FULL REBUILD
POOL:0
(PD:135 ) RUNNING
53%
80%
NA
1 VERIFY ONCE
POOL:1
(NA)
RUNNING
0%
99%
NA
2 VERIFY ONCE
POOL:2
(NA)
RUNNING
0%
99%
NA
Total Background Jobs: 3
To display the details of a job (Figure 94), enter command:
SHOW JOB <job-idx> ALL_ATTRIBUTES
Figure 94. Show Job Example Screen (2)
***************************
*
Background Jobs
*
***************************
OID:
0x2b220000 (Index:0
)
Target:
POOL:0x199b0000 (Index:0
Sub-Target:
PD:0x21310087 (Index:135
Type:
REBUILD
State:
RUNNING
Completion Status: UNKNOWN
Priority:
80%
Fraction Complete: 52%
Time:
NA
)
)
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 the 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 SFA10000 may or may not
limit the number of background jobs to keep the total of their priorities below 100.
96-00259-001 Rev C
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