Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hi!
Have you tried this in you drbd.conf?
syncer {
rate 20M;
}
This was a bit of a supprise to me too. But this helped me... ;)
Also I noticed that the sync might get slow anyway. And became faster
again with:
drbdadm adjust r0
Even if there was no changes in the config...
/Stefan
---------- Original Message -----------
From: [UTF-8?]Anže Vidmar <anze.vidmar at interseek.si>
To: drbd-user at linbit.com
Sent: Mon, 19 May 2008 11:56:24 +0200
Subject: [DRBD-user] DRBD slow sync
> hello list!
>
> I've setup a fresh install of DRBD + OCFS2 on the machine with the
> following properties:
>
> OS: (Bluewhite64 12) Linux 2.6.23.9-2
> ARCH: x86_64
> CPU:8 x Intel(R) Xeon(R) CPU E5430 @ 2.66GHz
> eth0 = 1Gb
> DRBD version = 8.2.5
>
> The problem is that DRBD sync in very slooooow, around 315k/s. There
> is no way I can speed-up the process. The storage with OCFS2 is 3.2T
> large and it's build on hardware RAID5 + 1 spare.
>
> Here is what I've already did:
>
> - changed the UTP cable (cross and regular)
> - tried with kernel that has DRBD included in, and kernel + DRBD module
> - I've test the data transfer directly on eth1 - the transfer was
> normal aroung 75M/s, so the link between the secondary (eth1) NIC's
> is ok - played with ethtool - I've setup the card to 100/1000M,
> half/full duplex... No change - tweaking drbd.conf "net"
> parameters. No speed change at all.
>
> Anyone have any idea what might be causing the slow sync? Is this
> normal for the 1st time sync?
>
> Thank you.
>
> Anze
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> drbd-user at lists.linbit.com
> http://lists.linbit.com/mailman/listinfo/drbd-user
------- End of Original Message -------