256MB cache, no BBU. Tried a lot of different combinations of settings. fbsd 6.2pre writes 220MB/s with raid-0
If I boot windows server 2003 instead, it writes at around 180MB/s with raid-5 (same configs). With fbsd6.2pre, I get the "best" performance with BadBBU/direct io/disabled cache and 8 drives, maybe around 50 MB/s, however I get a zig-zag performance pattern, with the adapter running at 500% (gstat) utilization one second, then down to 0% for maybe 3 seconds, back, etc. Fredrik Ivan Voras wrote: > Fredrik Widlund wrote: >> Ivan Voras wrote: >>> Several: >>> >>> - are there cache differences between the controllers (amount of >>> memory, cache policy)? >> Default settings on both. > > Maybe you should check what the defaults are :) Especially the amount > of memory and is there a battery to back the cache. > >>> - how does writing directly to the device (bypassing file system) >>> compare? >> Drives are four seagate 7200.10 400GB in a Raid-5 configuration. >> >> [/mnt/test (/dev/mfid0p1 mounted)] >> read: 200MB/s >> write: 15MB/s >> >> [/dev/mfid0p1] >> read: 200MB/s >> write: 8MB/s >> >> [/dev/mfid0] >> read: 200MB/s >> write: 10MB/s > > This is bad :( The difference between p0 and raw device might indicate > a stripe size misalignment, but the values are too low in any case. > > > _______________________________________________ > [email protected] mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "[EMAIL PROTECTED]" _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
