[DRBD-user] DRBD 10Gb performance

Julio Rodanes - KNET julio at knet.es
Thu Nov 12 19:49:06 CET 2009


Hello, I have 1 drbd with a size of 2 TB, connected to a dedicated 10Gb Ethernet connection.
The network configuration is:

common {
 syncer { rate 100M; }
}

resource vg1Sata {
 protocol C;
 startup {
  wfc-timeout 0; ## Infinite!
  degr-wfc-timeout 120; ## 2 minutes.
 }

 disk {
  on-io-error detach;
 }

 net {
  # timeout 60;
  # connect-int 10;
  # ping-int 10;
  # max-buffers 2048;
  # max-epoch-size 2048;
  max-buffers 20480;
  max-epoch-size 16384;
  sndbuf-size 128k;
 }


 on san001.knet.es {
  device /dev/drbd2;
  disk /dev/sdb2;
  address 10.255.255.1:7790;
  meta-disk internal;
 }

 on san002.knet.es {
  device /dev/drbd2;
  disk /dev/sdb2;
  address 10.255.255.2:7790;
  meta-disk internal;
 }
}


I'm not sure that is correct because I have the following results:

2: cs:SyncSource ro:Primary/Secondary ds:UpToDate/Inconsistent C r----
    ns:111347040 nr:0 dw:0 dr:211941504 al:0 bm:12935 lo:0 pe:100 ua:0 ap:0 ep:1 wo:b oos:2226482392
        [>....................] sync'ed:  4.8% (2174296/2283032)M
        finish: 6:57:24 speed: 88,848 (73,156) K/sec

What are the best values or configuration for a 10Gb connection?


Thanks

Julio Rodan?s Martinez
SISTEMAS DE COMUNICACI?N

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