I have used both on AIX, and really have never seen a difference either way.
I use LVM raw volumes for both, since I find them easier to deal with. TSM mirrors the database/log volumes, and AIX mirrors the storage pool volumes. TSM V5 can utilize AIO for JFS under with AIX, and this is a different ball- game altogether. I am not actually sure if JFS is native on Solaris, you have to have Veritas installed, and this will render a significant improvment over the native Solaris filesystem I/O. Check with your sources to see if they are indeed running Veritas on their Sun systems. I have compared VXFS and AIX JFS on machines of the same performance characteristics, and they perform about the same (under various tests VXFS did beat JFS, I used IOZONE). Seeing arguments either way, I use raw LV's for ease of configuation and smaller overhead (no jfslog, etc). good luck. bob On Sat, Sep 21, 2002 at 07:03:38PM -0000, Arni Snorri Eggertsson wrote: > Hiya, > > I've been reading about using RAW volumes for database and diskpool volumes, my >impression is that when running AIX and using JFS the benefits are trivial. However >I've seen people talking about 200-300% performance increase when running TSM on >Solaris. > > What I am wondering is if anyone has actually done experiments with this on AIX on a >real environment, i.e. performance check using JFS on one hand and then RAW volumes >on the other? > > > > thanks, > Arni Snorri Eggertsson > [EMAIL PROTECTED]
