Re: Use of Veritas to create raw partitions?

Hi, >Chao Y. Din said: > Whether you want to have a single sub-disk/plex as a volume (or a raw > partition) depends on several factors. Our client demands raid5, we do > not have a choice but to configure raid5. If you don't have the > restriction as we do, there are two possible ways to accomplish better > performance: > > 1) a single volume (raw partition) consists of a single sub-disk/plex. > Use informix fragmentation to improve the performance. > > 2) a single volume consists of multiple sub-disk/plex (a stripe disk > array). In this case, do not use Informix fragmentation. > > My guess is: the first approach will outperform the second one. Any > comments? Yes, I had a site that we switched from your secound approach to the first. Performance improved by at least 20%. Plus, then we could identify what disks were being hit and move tables around ourselves. This improved performance even more. Regards - Lester ############################################################################# # Lester Knutsen lester@access.digex.net # # Advanced DataTools Corporation Voice: 703-256-0267 # # Grant group privileges for Informix databases with DB Privileges # # Visit our Web page: http://www.access.digex.net/~lester # # Washington Area Informix User Group: http://www.access.digex.net/~waiug # #############################################################################