On 2/28/2010 6:15 PM, Stephen Harris wrote: > On Sun, Feb 28, 2010 at 02:37:13PM -0800, John R Pierce wrote: >> And how do I know all these mirror data mismatches are Swap? does not >> each mismatch mean the mirrors disagree, which means one of them is >> wrong. Which one? since they aren't timestamped or checksummed (like > > This thread is very timely. I updated my C5.3 to 5.4 last week (not > sure why it took me so long) and this morning noticed my raid5 was > resyncing. 5*1Tbyte disks. The resync took... > Feb 28 04:22:02 mercury kernel: md: syncing RAID array md3 > Feb 28 16:27:06 mercury kernel: md: md3: sync done. > > Performance was bad during this time. Not terrible from an interactive > point of view, but a job that normally run from 4am to 10am didn't finish > until 3pm. > > I like the concept of checking the disks are good, but it really > sounds like there are practical problems (false positives, performance > degregation) . > > So I think /etc/sysconfig/raid-check is going to read > ENABLED=no
I agree that is is a fairly surprising behavior change for an 'enterprise' system where the point is mostly to not have surprising behavior changes. On the other hand it is probably a good thing to do if you can make the scheduling fit in. -- Les Mikesell lesmikes...@gmail.com _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos