[lustre-discuss] patchless Lustre client on ZFS

[Dilger, Andreas]

On 2016/02/03, 06:37, "lustre-discuss on behalf of Peter Kjellström"
<lustre-discuss-bounces at lists.lustre.org on behalf of cap at nsc.liu.se>
wrote:

>On Sat, 30 Jan 2016 14:00:28 -0500
>"Ms. Megan Larko" <dobsonunit at gmail.com> wrote:
>
>> Thank you, Patrick,
>> 
>> I appreciate the clarification.  I wasn't sure what "patchess" really
>> meant in this context.
>
>To further clarify. All client builds (I know of) are patchless. Server
>builds can be patchless if using zfs but requires patched kernel for
>ldiskfs.

There isn't strictly a need for _kernel_ patches for ldiskfs either these
days, though of course still a bunch of patches for ldiskfs itself but it
means that Lustre can be built against an unpatched kernel so long as the
sources are available and an ldiskfs patch series exists for it.

The remaining kernel patches for RHEL7 are only for fault injection, and
performance tuning at the block layer for specific SCSI devices.

Cheers, Andreas

>/Peter K
> 
>> Cheers,
>> megan
>> 
>> On Sat, Jan 30, 2016 at 9:19 AM, Patrick Farrell <paf at cray.com> wrote:
>> 
>> > No, patchless refers to not needing a patched version of the kernel
>> > itself.  You'll still need the Lustre client bits you noted
>> > installed (and they will need to be built for your particular
>> > kernel version). Also, the ability to use patchless clients doesn't
>> > depend on ZFS vs ldiskfs on your servers, it will work either way.
>> >
>> > - Patrick
>> > ________________________________________
>> > From: lustre-discuss [lustre-discuss-bounces at lists.lustre.org] on
>> > behalf of Ms. Megan Larko [dobsonunit at gmail.com]
>> > Sent: Friday, January 29, 2016 10:31 PM
>> > To: Lustre User Discussion Mailing List
>> > Subject: [lustre-discuss] patchless Lustre client on ZFS
>> >
>> > Greetings,
>> >
>> > I have been reading that if the Lustre 2.6 server is built on ZFS
>> > then a patchless client may be used.  So am I understanding
>> > correctly that a Lustre 2.6 server on ZFS may have a client
>> > successfully mount without the lustre-client and
>> > lustre-client-module packages installed?
>> >
>> > TIA for the clarification.
>> > Cheers,
>> > megan
>> >  
>
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Cheers, Andreas
-- 
Andreas Dilger

Lustre Principal Architect
Intel High Performance Data Division