Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
RAID5 has a reputation of good read speeds and really lousy write speeds. Do you happen to know what the sustained write speed of your RAID5 array (ie locally) is ? Regards, Thanos Chatziathanassiou Andreas Semt wrote: > Lars Marowsky-Bree wrote: > >> >>> And: What maximum performance i can expect with such a hardware >>> configuration (production use experience anybody)? >> >> >> >> You could easily see >80MB/s. This will to a large degree depend on your >> physical disks. >> > > Not with my configuration :-( > i only get: > > --- snip --- > testnode1:~# cat /proc/drbd > version: 0.6.12 (api:64/proto:62) > > 0: cs:SyncingAll st:Primary/Secondary ns:1235920 nr:0 dw:0 dr:1236060 > pe:881 ua:0 > [>...................] sync'ed: 0.3% (96043/96256)M > finish: 3:47:11h speed: 7,245 (7,245) K/sec > --- snap --- > > and here my config: > > --- snip --- > testnode2:~# drbdsetup /dev/nb0 show > Lower device: 58:03 (/dev/lvmvg/backup) > Disk options: > Local address: 10.1.1.2:7789 > Remote address: 10.1.1.1:7789 > Wire protocol: C > Net options: > timeout = 6.0 sec > tl-size = 5000 > connect-int = 10 sec > ping-int = 10 sec > sndbuf-size = 131070 > sync-min = 40960 KB/sec > sync-max = 81920 KB/sec > sync-nice = 1 > --- snap --- > > What can cause this slowly drbd performance? Any suggestions? I've > used NetIO to get a feeling for the GBit Ethernet fitness and this > brought up a rate (with TCP/IP) of around 100 MByte/sec. So the > network works fine, i think. > >