Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
I'm curious, how is your WRITE performance in comparison? ----- Original Message ----- From: "Laurent CARON" <lcaron at lncsa.com> To: <drbd-user at lists.linbit.com> Sent: Friday, April 13, 2007 9:10 AM Subject: [DRBD-user] DRBD 0.7.23 over MD raid performance > Hi, > > I did set up two machines with drbd, heartbeat, raid ... and i'm still > wondering why the read throughput using drbd is as much as 4 times less > than using md. > > hdparm -tT /dev/md2 > > /dev/md2: > Timing cached reads: 6496 MB in 2.00 seconds = 3251.89 MB/sec > Timing buffered disk reads: 1114 MB in 3.01 seconds = 370.59 MB/sec > > hdparm -tT /dev/drbd0 > > /dev/drbd0: > Timing cached reads: 6532 MB in 2.00 seconds = 3270.07 MB/sec > Timing buffered disk reads: 322 MB in 3.01 seconds = 106.88 MB/sec > > Please note that md2 is the underlying device that holds drbd0 > > Thanks > > Laurent > _______________________________________________ > drbd-user mailing list > drbd-user at lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user >