examples of (large) Gentoo clusters

    From: "Daniel van Ham Colchete"
<daniel.colchetegmail.com>
    Date: Tue, 5 Dec 2006 19:15:49 -0200
    
    
    Well, my first Lustre test was crashing on every 'write'
operation.
    Them I enabled LVM and it worked. I'm using only the
vanilla 2.6.12.6
    kernel with the lastest 1.4 release.

I'd say something's manged in your kernel/patches.  Perhaps
due to 1.4; I went
to 1.6 as soon as I was able to, and have no experience with
the latest and
greatest 1.4.
    
    Question: would you use Lustre 1.6 now or you would wait
until the
    official version is out?

If I had to ship today, I'd probably ship the 1.6b5 code.  I
find lustre 1.4
much more of a headache to configure and manage. 
Thankfully, I don't have to
ship today; I expect by the time I do, cfs will have
released the real 1.6
code.
    
    Question: do you expect in upgrade incopability between
the current
    1.6 beta and next betas or the official version?
    
What variety of incompatibility?  On-disk format? 
On-the-wire format?
Something else?  The short answer is no, in general the cfs
guys seem to do a
pretty good job at making that stuff backward compatible. 
Having said that,
there was some kind of an incompatibility between 1.6b4 and
1.6b5.  So I guess
they don't get it right all the time :-}

The slightly longer answer is "ask cfs".  I
believe the answer you'll get is
that they claim compatibility for one prior release, and
that they make no
claims about compatibility of beta code with anything else.
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"John R. Dunning" writes:
>     From: "Daniel van Ham Colchete"
<daniel.colchetegmail.com>
>     Date: Tue, 5 Dec 2006 19:15:49 -0200
>     
>     Question: would you use Lustre 1.6 now or you would
wait until the
>     official version is out?
> 
> If I had to ship today, I'd probably ship the 1.6b5
code.  I find lustre 1.4
> much more of a headache to configure and manage. 
Thankfully, I don't have to
> ship today; I expect by the time I do, cfs will have
released the real 1.6
> code.

It is encouraging to hear that you are willing to base a
product on Lustre
1.6.  Are you by any chance willing to share some of your
knowledge about
installing Lustre on Gentoo with others?    Perhaps I
could make
self-support an option, if it looked like it would be
reliable.

-bryan

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