tsm 8.1 async io?

[TeamTLR]

I have read through alot of the 8.1 perf guide and googled this string with no successful hits. In what scenario is this parameter recommended?
https://www.ibm.com/support/knowledgecenter/SSEQVQ_8.1.0/perf/b_perf_tuning_guide2.pdf


Server Version 8, Release 1, Level 1.0
q opt
...
Async I/O No
..
DirectIO No
TSM DB volumes sit on a v7 with easy tier on
All other volumes sit on the same v7 with easy tier off.

AIX 7.1 TL4
/dev/tsmdb01_lv /tsm/tsmdb01 jfs2 Aug 28 11:06 rw,rbw,rbr,noatime,log=/dev/loglv00
/dev/tsmdb02_lv /tsm/tsmdb02 jfs2 Aug 28 11:06 rw,rbw,rbr,noatime,log=/dev/loglv00
/dev/tsmdb03_lv /tsm/tsmdb03 jfs2 Aug 28 11:06 rw,rbw,rbr,noatime,log=/dev/loglv00
/dev/tsmdb04_lv /tsm/tsmdb04 jfs2 Aug 28 11:06 rw,rbw,rbr,noatime,log=/dev/loglv00
/dev/tsmlog_lv /tsm/tsmlog jfs2 Aug 28 11:06 rw,rbw,rbr,log=/dev/loglv01
/dev/tsmarchlog_lv /tsm/tsmarchlog jfs2 Aug 28 11:06 rw,rbw,rbr,log=/dev/loglv01
/dev/tsmarchlogfa_lv /tsm/tsmarchlogfail jfs2 Aug 28 11:06 rw,rbw,rbr,log=/dev/loglv01
/dev/softwareinst_lv /tsm/softwareinstall jfs2 Aug 28 11:06 rw,noatime,log=/dev/loglv01
/dev/tsmaclv /opt/IBM/tivoli jfs2 Aug 28 11:06 rw,noatime,log=/dev/hd8
/dev/tsminst1_lv /tsm/tsminst1 jfs2 Aug 28 11:06 rw,rbw,rbr,noatime,log=/dev/loglv00
STGPools dev=file
/dev/db2cyblv00 /tsmdb2/db200 jfs2 Aug 28 11:06 rw,rbw,rbr,noatime,log=INLINE
/dev/db2cyblv01 /tsmdb2/db201 jfs2 Aug 28 11:06 rw,rbw,rbr,noatime,log=INLINE
/dev/db2cyblv02 /tsmdb2/db202 jfs2 Aug 28 11:06 rw,rbw,rbr,noatime,log=INLINE
/dev/db2cyblv03 /tsmdb2/db203 jfs2 Aug 28 11:06 rw,rbw,rbr,noatime,log=INLINE
/dev/db2cyblv04 /tsmdb2/db204 jfs2 Aug 28 11:06 rw,rbw,rbr,noatime,log=INLINE
/dev/db2cyblv05 /tsmdb2/db205 jfs2 Aug 28 11:06 rw,rbw,rbr,noatime,log=INLINE
/dev/winMYlv00 /tsmdata/winMY00 jfs2 Aug 28 11:06 rw,rbw,rbr,noatime,log=/dev/loglv02
/dev/winMYlv01 /tsmdata/winMY01 jfs2 Aug 28 11:06 rw,rbw,rbr,noatime,log=/dev/loglv02
/dev/winMYlv02 /tsmdata/winMY02 jfs2 Aug 28 11:06 rw,rbw,rbr,noatime,log=/dev/loglv02
/dev/winMYlv03 /tsmdata/winMY03 jfs2 Aug 28 11:06 rw,rbw,rbr,noatime,log=/dev/loglv02
/dev/winMYlv04 /tsmdata/winMY04 jfs2 Aug 28 11:06 rw,rbw,rbr,noatime,log=/dev/loglv02

thank you!

 

[marclant]

TSM DB volumes sit on a v7 with easy tier on

You don't want easy tier with the DB volumes, seen many DB performance issues due to that. They should be on SSD/Flash and stay there.

/dev/tsmdb01_lv /tsm/tsmdb01 jfs2 Aug 28 11:06 rw,rbw,rbr,noatime,log=/dev/loglv00

In the Blueprint, they recommend inline logging. Page 30.

To your original question about AIXASYNCIO. It's listed in the Knowledge Center as an option in 7.1, it's not in the 8.1 list of options. Can't find any reference that it was deprecated, not sure if it was removed discretely or if it's an omission in the manual.

 

[TeamTLR]

cool thanks!