[Lustre-discuss] Inquiry and advice requested on Lustre Implementation

[Brian J. Murrell]

Please turn off the HTML formatting.  Plain text is sufficient for the
material this list covers.  Thanx.

On Thu, 2009-02-12 at 14:12 -0500, PMilanese at nypl.org wrote:

> 
> I see. I was under the impression that mirroring was part of the
> Lustre package 
> already.

No.  Not yet.  I don't know when it will be.  It's a fairly distant
future feature.

> Am I correct to say that Lustre does handle the concatenation 
> of OST volumes? 

Well, yeah, I guess you could describe it that way.  Many OSTs can be
"pooled" into a filesystem and OSTs can be added and removed to/from a
filesystem at any time.

There is no actual "concatenation" going on,  Just lots of disks in a
single filesystem.

> Perhaps someone with DRBD experience can expand on that, as that would
> be quite helpful.

Lustre pools OSTs into a filesystem independent of DRBD.  They are
orthogonal to one-another.

> Is Lustre aware of DRBD? vice-versa?

No.  DBRD is just a networked block device.  Lustre uses block devices
(in whatever form they come) for OSTs.  It doesn't really care what
technology (performance concerns aside) is underlying the block device.
> 
> Thanks for the Information Brian. It's very helpful.

You are welcome.

b.

> 
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