Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Mon, Jun 4, 2012 at 2:17 PM, Wiebe Cazemier <wiebe at halfgaar.net> wrote: > ----- Original Message ----- >> From: "Lars Ellenberg" <lars.ellenberg at linbit.com> >> To: "Wiebe Cazemier" <wiebe at halfgaar.net> >> Cc: drbd-user at lists.linbit.com >> Sent: Monday, 4 June, 2012 11:29:20 AM >> Subject: Re: [DRBD-user] Performance hit DRBD vs raw block device, even when disconnected >> >> Put DRBD meta data on RAID 1. >> Use decent battery backed (or otherwise non-volatile) write cache. >> Disable barriers and flushes in DRBD. > > If I disable flushes (along with the already disabled barriers), write performance drops to 5 MB/s. > > And about putting meta data on RAID1; do you mean a dedicated array specifically for DRBD meta data? I don't think you've told us your DRBD version; that might be a helpful bit of information. Cheers, Florian