What can I do to improve the performance of my Content Manager for iSeries object backup process?

Technote (FAQ)


Question

I have millions of images/files located in my i5/OS IFS "Root" directory and my backup takes many hours. Is there anything I can do to speed up this backup process?

Answer

A new parameter has been added to the SAV command that improves IFS SAV performance at V6R1Mx and V7R1M0, once certain enabling PTFs are applied. This parameter, ASYNCBRING, will specify whether objects should be asynchronously brought into memory during the save processing. More information can be found about ASYNCBRING at the related URLs listed in the section below.

One customer reports positive results regarding the ASYNCBRING feature with respect to his Content Manager for iSeries and OnDemand for IBM i IFS backup process. He has noticed a 57% reduction in the time required to save his IFS objects. He has provided the statistics below. Of course, your results will vary based on many things, such as system hardware, CPU utilization, size and number of IFS objects, speed and number of tape drives, etc., but this may be a feature worth investigating for your environment.

3/18/2012
3/25/2012
4/8/2012
Effects of implementing ASYNCBRING
and upgrading to POWER 7
9406-550
9406-550
8202-E4C
Power 5
Power 5
Power 7
i 7.1
i 7.1
i 7.1
BRMS
BRMS
BRMS
Tape drives
3592-E05 (2)
3592-E05 (2)
3592-E05 (2)
ASYNCBRING
ASYNCBRING
IFS (Excluding CM & CM/OD)
Number of objects
484,152
707,637
423,847
Elapsed time (hh:mm)
:43
:40
:21
CM/OD
Number of objects
483,097
494,772
524,994
Elapsed time (hh:mm)
:56
:23
:12
CM (Sub-directories 1-39)
Number of objects
1,959,532
1,959,532
1,959,532
Elapsed time (hh:mm)
4:44
2:09
1:57
CM (Sub-directories 40-100)
Number of objects
2,765,810
2,782,302
2,814,575
Elapsed time (hh:mm)
6:51
2:28
2:21
Total IFS objects
5,692,591
5,944,243
5,722,948
Total IFS save time
13:14
5:40
4:51
Reduction in IFS save time
57%
14%
IFS save rate (obj/hr)
430,171
1,048,984
1,179,960
Increase in IFS save rate
144%
12%
Overall backup time (incl IPL)
9:06
6:25
4:24
Reduction in overall backup time
29%
31%

To reiterate, please execute your own testing and research on this new feature, as your results may vary.

Related information

ASYNCBRING Enablement PTFs
Using ASYNCBRING on IFS saves

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Document information


More support for:

Content Manager for iSeries
Other

Software version:

5.3

Operating system(s):

AS400, i5/OS

Software edition:

All Editions

Reference #:

1592931

Modified date:

2013-12-20

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