[DRBD-user] Massive slow down - drbd 0.6.12

JD Gray kahdgarxi at grayserv.com
Thu Jun 24 00:10:04 CEST 2004


I'm in the process of setting up a heartbeat + drbd cluster. I got drbd 
working... kinda. I run /etc/init.d/drbd start on both machines, they 
connect, and begin SyncingAll, at first the sync went at ~250K/s, so, I 
tweaked the sync-rate to 10M. Now, it runs at the 10 it's supposed to 
for about 50% of the sync, but then slows down dramatically, back to 
~250K/s. I tried using a different network. (Using their internet 
connection NIC's running through a switch, rather then the heartbeat 
interface) but I'm having similar results other then the switched 
network has a much more variable speed when it does work, which is 
understandable because of their internet connection through that nic. 
The NIC's involved all use the eepro100 driver, excluding the heartbeat 
interface NIC on megatron. Here's my drbd.conf (identical on both machines):

armada / # cat /etc/drbd.conf
resource drbd0 {
  protocol=C
  fsckcmd=fsck.xfs
 
  disk {
    disk-size=17928384
  }
 
  net {
    sync-rate=10M # bytes/sec
    timeout=60
    connect-int=10
    ping-int=10
  }
 
  on armada {
    device=/dev/nb0
    disk=/dev/md0
    address=192.168.10.10
    port=7789
  }

  on megatron {
    device=/dev/nb0
    disk=/dev/md0
    address=192.168.10.20
    port=7789
  }
}

Thanks in advance for any help.

-JD Gray



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