[DRBD-user] Is it worth considering eth bonding in this setup?
eric.robinson at psmnv.com
Mon Dec 22 18:48:05 CET 2008
What would be your main goal in considering bonding, bandwidth or
From: drbd-user-bounces at lists.linbit.com
[mailto:drbd-user-bounces at lists.linbit.com] On Behalf Of Luca Lesinigo
Sent: Monday, December 22, 2008 9:21 AM
To: drbd-user at lists.linbit.com
Subject: [DRBD-user] Is it worth considering eth bonding in this setup?
I'm a long time happy user of drbd - many thanks for the great work!
I have a two node setup with two SMP servers, two S-ATA each, two
gigabit each. One gigabit is the public network to internet, and the
other one is a crossover between the two nodes carrying drbd data and
internal (lan) traffic. I have the obvious setup with a primary drbd
device on each node mirrored on the corresponding drive on the other
node. FYI, I run lvm2 on the drbd devices and use logical volumes for
Xen paravirtualized guests. I don't need live migration so I prefer the
flexibility lvm between drbd and xen.
Now I'm adding a 2x gigabit card in each node (Intel PRO/1000MT pci- x).
The current LAN port will be connected to a switch to create a LAN for
internal traffic between the two and other servers. The two dual-
gigabits will be crossed between the two nodes and will carry drbd
traffic (w/ jumbo frames).
The simplest setup would be one drbd device per gigabit link. I use
"normal" 7200rpm s-ata disks, not fancy 15k rpm ones or other strange
things. I use the latest stable 8.0.x release.
Is there any reason why I should consider a bonding setup with both drbd
devices on the bonded link? Would you recommend such a setup?
Talking about availability, I don't see any reason why I should loose
only one of the two links... performance-wise, I think the gigabit link
and a single 7200rpm sata disk should be more or less leveled.
Also, I'm going to do some RTFM on this, but do you recommend any
special drbd setting to make best use of the direct gigabit link with
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