On Sat, 7 Sep 2002, Chris Jantzen wrote: > Excuse me if this has been covered already, though I did try to read > through the archives. I am running md raid5 (software) over several > drives and importing that into LVM and using reiserfs. It's worked fine > for some time, but now I want to start snapshots. I've learned about the > VFS lock patch, yes, but my real question is: why is the raid5 buffer > cache constantly thrashing back and forth? I assume this has to do with > a conflict between reiserfs's 4096 byte blocks and LVM's 512 > SECTOR_SIZE. Or did I configure something wrong somewhere? Is it safe to > just change SECTOR_SIZE in lvm.h or will that mess up on-disk > structures? Thank you. I have exactly the same symptoms with the same configuration (md + lvm + reiser) ; the raid5 cache size keeps changing when I start using snapshots. Does someone have some tips to avoid/explain this ? -- [ Xavier Montagutelli `""' ] [ INSA Toulouse 0--0 ] [ ---------oOOo---()---oOOo---------- ] [ Dpt de Math / Service Informatique Tel: +33 5 61 55 93 38 / 67 ] [ 135, Avenue de Rangueil Fax: +33 5 61 55 93 20 / 60 ] [ 31077 Toulouse Cedex 4 Mel: montagut@gmm.insa-tlse.fr ] _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
