On 3/1/07, Joshua D. Drake <jd@xxxxxxxxxxxxxxxxx> wrote:
Alex Deucher wrote: > On 3/1/07, Joshua D. Drake <jd@xxxxxxxxxxxxxxxxx> wrote: >> \ >> >> Is the SAN being shared between the database servers and other >> >> servers? Maybe >> >> it was just random timing that gave you the poor write performance on >> >> the old >> >> server which might be also yielding occassional poor performance on >> >> the new >> >> one. >> >> >> > >> > The direct attached scsi discs on the old database server we getting >> > 45MBps not the SAN. The SAN got 62/145Mbps, which is not as bad. >> >> How many spindles you got in that SAN? > > 105 IIRC. You have 105 spindles are you are only get 62megs on writes? That seems about half what you should be getting. (at least).
Take the numbers with grain of salt. They are by no means a thorough evaluation. I just ran bonnie a couple times to get a rough reference point. I can do a more thorough analysis. Alex
Joshua D. Drake > > Alex >
