I have a fresh installation of AIX 7.1. I noticed that JFS2 file system with logging enabled (
log=/dev/hd8) is dramatically slower than one with
log=NULL. Simple zip archive extraction takes
5 minutes with logging enabled vs
5 seconds with no logging. I'm using standard 900 GB 10000 rpm SAS 2.5-inch SFF, G2, Hot-Swap Express, hard drive, option part number 81Y9927. AIX is running on LPAR. I've installed Centos 6.4 on the same LPAR and got almost same results. Extraction of the same zip archive takes about 5 seconds. This slowness affects everything including DB2 running on my AIX2. I tried to disable logging on my
/var but after reboot all files gone from this directory.
My question is what is the best practice for optimizing I/O performance on AIX? I need to be able to continuously extract files, create and delete databases on my DB2 instance without loosing data after reboot. Thank you.
P.S. This video proves my concerns. But i need to be able to increase I/O performance system wide.