Lustre discuss - Nov 2009 - lustre support on suse 11 with PPC64

hi All,

 

I could not find PPC64 Lustre binaries for SUSE 11.

 

I just checked Sun web site.

 

Is there any other place should I look into ?

 

 

 

__

tharindu

 



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On Wed, 2009-11-04 at 15:34 +0530, Tharindu Rukshan Bamunuarachchi
wrote: 
> hi All,
Hi,
> I could not find PPC64 Lustre binaries for SUSE 11.
Because we have so little demand for ppc64 packages, we don''t produce
them for SDLC.

Note that ppc64 is supported for the Lustre client only.  There is no
server support on ppc64.

b.


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SDLC ? btw, do I have to build it from source :-)----- Original Message
-----From: "Brian J. Murrell" <Brian.Murrell at Sun.COM>Date:
Wednesday, November 4, 2009 7:20 pmSubject: Re: [Lustre-discuss] lustre support
on suse 11 with PPC64To: lustre-discuss at lists.lustre.org> On Wed,
2009-11-04 at 15:34 +0530, Tharindu Rukshan Bamunuarachchi> wrote: > >
hi All,> > Hi,> > > I could not find PPC64 Lustre binaries for
SUSE 11.> > Because we have so little demand for ppc64 packages, we
don''t produce> them for SDLC.> > Note that ppc64 is supported
for the Lustre client only.? > There is no> server support on ppc64.>
> b.> > > _______________________________________________>
Lustre-discuss mailing list> Lustre-discuss at lists.lustre.org>
http://lists.lustre.org/mailman/listinfo/lustre-discuss


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On Wed, 2009-11-04 at 18:57 +0500, Tharindu Bamunuarachchi
wrote:
> SDLC ? 
Sun Download Centre.
> btw, do I have to build it from source :-)
Yes.

b.

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> Because we have so little demand for ppc64 packages, we don''t
produce
> them for SDLC.
This I understand, just rebuild from source.
 
> Note that ppc64 is supported for the Lustre client only.  There is no
> server support on ppc64.
Not that this is a big deal realistically, since it would be difficult
to find PPC64 hardware that works well for a server, unless you roll
your own embedded system...

But why? The linux kernel has no problems providing an endian-clean
and wordsize-clean environment to operate in.

Are Sparc64 servers supported?

On Wed, 2009-11-04 at 11:06 -0600, Troy Benjegerdes wrote:
> 
> Not that this is a big deal realistically, since it would be difficult
> to find PPC64 hardware that works well for a server, unless you roll
> your own embedded system...
Sure.  But it counts for all machines of the same endianess, not just
ppc64.
> But why? The linux kernel has no problems providing an endian-clean
> and wordsize-clean environment to operate in.
Sure, but Lustre is quite a bit more than just a driver in any one Linux
kernel.  There is an entire networking stack written from the ground up,
not to mention the VFS client and server modules.  And Lustre is a lot
bigger (I mean in concept) than the Linux kernel.  The Linux kernel has
the luxury of only having to deal with a single endianess at a time.
Lustre has to deal with potentially different endianesses all at once.

To be sure, these are not at all insurmountable difficulties.  They are
just things that are not being demanded enough to warrant attention
(yet).  As always, we accept patches.
> Are Sparc64 servers supported?
I don''t know.  Are they the same endianess as ppc64?  If so, then no.

b.

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On 2009-11-04, at 14:05, Brian J. Murrell wrote:
> On Wed, 2009-11-04 at 11:06 -0600, Troy Benjegerdes wrote:
>>
>> Not that this is a big deal realistically, since it would be  
>> difficult
>> to find PPC64 hardware that works well for a server, unless you roll
>> your own embedded system...
>
> Sure.  But it counts for all machines of the same endianess, not just
> ppc64.
>
>> But why? The linux kernel has no problems providing an endian-clean
>> and wordsize-clean environment to operate in.
>
> Sure, but Lustre is quite a bit more than just a driver in any one  
> Linux
> kernel.  There is an entire networking stack written from the ground  
> up,
> not to mention the VFS client and server modules.  And Lustre is a lot
> bigger (I mean in concept) than the Linux kernel.  The Linux kernel  
> has
> the luxury of only having to deal with a single endianess at a time.
> Lustre has to deal with potentially different endianesses all at once.
>
> To be sure, these are not at all insurmountable difficulties.  They  
> are
> just things that are not being demanded enough to warrant attention
> (yet).  As always, we accept patches.
>
>> Are Sparc64 servers supported?
>
> I don''t know.  Are they the same endianess as ppc64?  If so, then
no.

Just as a bit of background here - the reason that we don''t support  
big-endian
servers is due to problems in the ext3-patched ldiskfs code.  It  
wasn''t written
originally to be endian clean, and that work wasn''t done until later  
in the ext4
project when it was landed to the kernel.  In theory, the SLES11  
Lustre server
(with ext4-based ldiskfs) would be able to run on a big-endian system,  
if there
are no other issues with endian support in Lustre.  Since we don''t  
test that
configuration I wouldn''t bet my data on it without significant testing.

Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.