Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Wed, 2006-10-04 at 16:09 +0200, Peter Sabaini wrote: > Hello list, > > I experimented with drbd a bit; on my first sync it says this in /proc/drbd: > > # cat /proc/drbd > version: 0.7.20 (api:79/proto:74) > SVN Revision: 2260 build by debuild at build64-dapper, 2006-07-20 16:42:44 > 0: cs:SyncSource st:Secondary/Secondary ld:Consistent > ns:3214256 nr:0 dw:0 dr:3219148 al:0 bm:196 lo:0 pe:182 ua:1223 ap:0 > [=>..................] sync'ed: 5.7% (52205/55344)M > finish: 6:11:14 speed: 2,204 (1,220) K/sec > > This seems extremely slow -- Hardware is 2xHP DL385 on a Procurve Switch with > Gigabit connection between them. > > The syncer rate in drbd.conf is set to 50M, Protocoll is "C" > > dstat gives me: > > # dstat 1 > ----total-cpu-usage---- -disk/total -net/total- ---paging-- ---system-- > usr sys idl wai hiq siq|_read write|_recv _send|__in_ _out_|_int_ _csw_ > 0 1 8 90 0 0| 0 0 | 0 0 | 0 0 |1109 1449 > 0 0 0 100 0 0| 0 0 |2880k 161k| 0 0 |1249 1554 > 0 1 0 98 0 1| 0 0 |2990k 135k| 0 0 |1144 1410 > 0 0 0 100 0 0| 0 0 |3004k 152k| 0 0 |1177 1343 > 0 0 0 100 0 0| 0 0 |2893k 148k| 0 0 |1161 1391 > 0 0 0 100 0 0| 0 0 |2852k 150k| 0 0 |1197 1451 > 0 0 0 99 0 0| 0 0 |5915k 306k| 0 0 |2400 2842 > > > Usually, I can push 110MB/sec over the wire via NFS. > > Am I missing something? Is it only the initial sync thats slow? > Do you have fast i/o backend? See "$hdparm -t <underlying io device>. > Thanks for any pointers! > peter. > > > > _______________________________________________ > drbd-user mailing list > drbd-user at lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user > > -- Milind "The world is divided into one group: those who start counting at 0, and those who don't."