[DRBD-user] Diagnosing DRBD Slowness

Robinson, Eric eric.robinson at psmnv.com
Tue Oct 21 22:44:46 CEST 2008

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

Ben Clewett said:

> # drbdadm adjust

This is fantastic. It took 3 days to sync 12.5%, but now in the past 10
minutes since the change, it has jumped to 27%. I'm happy as can be.

Thanks are definitely in order.

I'm still puzzled about the output of the dd command, though...

[root at ha03 download]# dd if=/dev/zero bs=1M count=100 | nc 10000
10+0 records in
9+0 records out
9437184 bytes (9.4 MB) copied, 27.7838 seconds, 340 kB/s

The numbers look pretty much the same whether I connect from nc to nc on
different hosts or the same host.


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