On Thu, May 29, 2003 at 04:35:28PM -0700, Max Kalika wrote: > Quick followup... > > I blew away the snapshots and tried again. The performance was much better > (not surprisingly), but I still have lots of "busy buffer" messages in the > kernel log. Would anyone know what this is all about, and whether or not I > should worry about it? No, they're are caused by our tools syncing LVM metadata and will disapapear in the next LVM2 release (as Joe mentioned). > I'm considering putting LVM2 on a production mail > server, primarily for the simple resize capabilities, but also to use > snapshots during the rsync process (so as not to get many "file doesn't > exist" errors). Go for it :) Regards, Heinz -- The LVM Guy -- > > Quoting Max Kalika <max+lists.lvm-dev@lsit.ucsb.edu>: > > > Hello LVM devs and others, > > > > I've been trying to use LVM2 on a backup server for the past few days and > > I'm seeing some very strange things. > > > > My configuration: > > Dell PowerEdge 1300 (800Mhz) > > 512 MB RAM (2GB swap) > > 4 120GB IDE (8mb cache) disks in a RAID-5 configuration (on a 3ware > > card) Custom built vanilla kernel (2.4.20) with DM patches (0.96.08) > > applied LVM2 utilities version 1.95.15 > > > > I have a 300GB VG with a 150GB LV on it. I also have a 50GB snapshot and > > a 10GB snapshot. I first rsync all remote server data (8 other machines) > > to this "holding area" -- where I also hope to have 7 days of snapshot > > information available on disk. From here, the latest "current" data gets > > pushed to tape. > > > > Right now during an rsync of a huge mailstore (lots of small files) from > > the mail server, the performance on the backup server degrades severly (up > > to 12 1min load ave. and higher) and I'm seeing lots of the following in > > the kernel log: > > > > May 29 14:14:15 butters invalidate: busy buffer > > May 29 14:14:15 butters invalidate: busy buffer > > May 29 14:14:15 butters invalidate: busy buffer > > May 29 14:14:15 butters invalidate: busy buffer > > ... on and on and on ... > > > > I'm guessing that most of the cpu is busy copying stuff from the original > > LV to the snapshots. Is this a valid assumption? What can one do to help > > the situation? Or do I have a different misconfiguration? Any light you > > can shed on this is greatly appreciated. TIA. > > > > -- > > ---max kalika > > --max@lsit.ucsb.edu > > -lsit systems administrator > > > > _______________________________________________ > > linux-lvm mailing list > > linux-lvm@sistina.com > > http://lists.sistina.com/mailman/listinfo/linux-lvm > > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ > > > > ---max kalika > --max@lsit.ucsb.edu > -lsit systems administrator > > _______________________________________________ > linux-lvm mailing list > linux-lvm@sistina.com > http://lists.sistina.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ *** Software bugs are stupid. Nevertheless it needs not so stupid people to solve them *** =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Heinz Mauelshagen Sistina Software Inc. Senior Consultant/Developer Am Sonnenhang 11 56242 Marienrachdorf Germany Mauelshagen@Sistina.com +49 2626 141200 FAX 924446 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
