DRBD (was: MerriLUG Nashua ...)

[Kenny Lussier]

On Mon, Jun 23, 2008 at 5:53 PM, Ben Scott <dragonhawk at gmail.com> wrote:

> On Mon, Jun 23, 2008 at 5:31 PM, Flaherty, Patrick <pflaherty at wsi.com>
> wrote:
> > I didn't go to the meeting, but I saw the slides mentioned DRBD ...
>
>  What's DRBD?
>
>  (Yes, I can use Google.  This is actually a cleverly disguised ploy
> intended to foster discussion on the list.  (Oh, drat, now it's not
> cleverly disguised anymore!))
>

DRBD is a way of doing network-based block devices. It's used to do network
RAID 1 in HA clusters. You set two system up and dedicate a particular block
device to be the drbd block device. Then, when you write to one, it goes
over a private network and writes to the other. It keeps the data in the
cluster synchronized. I used it a few years back in conjunction  with Linux
HA to build an HA NFS server. It was fairly simple to set up and get going.
I would say that it has been surpassed by GFS these days, though.

C-Ya,
Kenny
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