Re: Current NBD 'stuff'

Paul Clements (kernel@steeleye.com)
Wed, 5 Dec 2001 11:14:43 -0500 (EST)


On 4 Dec 2001, Edward Muller wrote:

> Actually I am playing with ENBD now.

Yep. I've looked at that too.

> I think ENBD is targeted for inclusion in the kernel in 2.5, but it can
> be found seperatly (sp) at http://www.it.uc3m.es/~ptb/nbd/
>
> It looks much better than the nbd stuff that is currently in the kernel.

A word of caution on this. I played around with ENBD (as well as some
others) about 6 months ago. I also did some performance testing with
the different drivers and user-level utilities. What I found was that
ENBD achieved only about 1/3 ~ 1/4 the throughput of NBD (even with
multiple replication paths and various block sizes). YMMV.
I also looked at DRBD, which performed pretty well (comparable to NBD).

> But that's mostly because Pavel doesn't have much time at the moment for
> it AFAIK.

Yeah. I wish I had the time to develop/maintain a network block
device driver myself...but unfortunately I don't... :/

-- 
Paul Clements
Paul.Clements@SteelEye.com

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