Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
See below > Date: Thu, 11 Nov 2010 21:48:19 +0100 > From: lars.ellenberg at linbit.com > To: drbd-user at lists.linbit.com > Subject: Re: [DRBD-user] Low performance over NFS after upgrade from 0.7.25 to 8.2.7 > > On Thu, Nov 04, 2010 at 01:55:56PM +0100, Håkan Engblom wrote: > > > > Hi drbd-users, > > > > We use DRBD on a system with two fileservers. We have three replicated > > DRBD-partitions, and on top of that we use ext3 filesystem, and these > > are exported over NFS, > > pretty basic setup. NFS-server is in kernel. Linux kernel is > > 2.6.27.39, running on a x86_64 system. C-protocol for drbd. > > > The problem we have is that after the upgrade to 8.2.7, > > There is absolutely no reason to upgrade to 8.2, 8.2. is obsolete. > Upgrade to 8.3. Technically I agree, but unfortunately there are administrative reasons for taking 8.2.7 and not 8.3 8.2.7 is included in our linux distro, and the company I work at think it is then supported by our linux supplier.... > > > the > > performance, when creating many small files from an NFS-client, has > > decreased drastically. > > Then read about the disk settings no-disk-barrier, no-disk-flushes, > no-md-flushes, which did not exist in 0.7, and have performance impact. Missed this. Manipulating these settings "solves" the issue. > > > -- > : Lars Ellenberg > : LINBIT | Your Way to High Availability > : DRBD/HA support and consulting http://www.linbit.com > > DRBD® and LINBIT® are registered trademarks of LINBIT, Austria. > __ > please don't Cc me, but send to list -- I'm subscribed > _______________________________________________ > drbd-user mailing list > drbd-user at lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20101116/578e21ff/attachment.htm>