Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
With our two 3ware 7500 controllers write performance with 0.7 was so bad that the system was nearly unusuable (with ~100 active users on samba shares). With 0.6 (running since 1 1/2 years IIRC) performance is quite good (don't have benchmarks at hand right now, the machines with documentation are on a customers site, could check tomorrow). If I can help debugging, I could do some tests on friday afternoon. Felix Am Donnerstag, den 07.04.2005, 09:45 +1200 schrieb James Doherty: > On Wed, 2005-04-06 at 15:49 -0500, Nate Carlson wrote: > > On Wed, 6 Apr 2005, Todd Denniston wrote: > > > Ouch, that is one heck of a diffrence. However on thing 0.7 has over > > > 0.6 is that even on a cold restart, once the devices have fully synced > > > the first time, is that unless you force it to, 0.7 only has to sync > > > what has changed. > > > > Yeah, but the slow write speed for normal operations won't be acceptable. > > :( > > It's interesting that you should point that out. We have a RAID5 array > with a 3ware 7500-4 in one machine and 3ware 3W-6400 in the other. Both > machines have 3com gigabit nic's. We've only ever used DRBD 0.7.5 on > this setup and sync performance isn't too shabby (20,000 K/sec, although > I think I may have seen 30,000) but write performance seems to be rather > poor (no benchmarks on this). > > The machines aren't the fastest machines around, but they're fairly > decent Athlon XP's with lots of ram. Perhaps we are at the limits of our > hardware, but I expected a little better performance while writing to > the drbd device. Perhaps it is a 3ware<->DRBD issue? > > Cheers