Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hello, I have asked this question before for drbd 8.4.1 but I couldn't get proper write performance. Currently I downgraded drbd to 8.3.12 but I cannot get the syncer speed above 1Gb/s or 110MB/s. When I test the disk throughput with #dd if=/dev/zero of=/VM/test bs=512M count=1 oflag=direct I get a speed around 500MB/s (It's an all SSD raid 5 array) I installed a 10G network adapter and tested the connection with iperf and I get on average 7Gbit/s This should all be sufficient for a drbd syncer speed >110MB/s. I have set the "rate=200M" option for a 2Gbit/s rate cat /proc/drbd shows version: 8.3.12 (api:88/proto:86-96) GIT-hash: e2a8ef4656be026bbae540305fcb998a5991090f build by dag at Build64R6, 2011-11-20 10:57:03 0: cs:SyncSource ro:Primary/Primary ds:UpToDate/Inconsistent C r----- ns:176 nr:0 dw:0 dr:79839200 al:0 bm:4872 lo:0 pe:0 ua:20 ap:0 ep:1 wo:d oos:1470943696 [>...................] sync'ed: 5.2% (1436468/1514432)M finish: 3:30:54 speed: 116,228 (109,212) K/sec Only at the start the value of (200.000) K/sec is shown. What can I do to get the 200MB/s syncer speed? Best regards, Maurits van de Lande | Van de Lande BV. | Lissenveld 1 | 4941VK | Raamsdonksveer | the Netherlands |T +31 (0) 162 516000 | F +31 (0) 162 521417 | www.vdl-fittings.com |