Re: [lustre-discuss] Migrate OSTs to ZFS

[Fernando Perez]

Thank you Andreas.

Then I understand that it doesn't make sense configure the ZIL...I will 
try to use the ZIL SSDs disks for the MDT instead of our current SAS 
disks ;)


Regards.

=
Fernando Pérez
Institut de Ciències del Mar (CMIMA-CSIC)
Departament Oceanografía Física i Tecnològica
Passeig Marítim de la Barceloneta,37-49
08003 Barcelona
Phone:  (+34) 93 230 96 35
=

On 09/07/2015 08:04 PM, Dilger, Andreas wrote:

The ZIL is not currently used by Lustre OSTs or MDTs since it needs specific 
support in the filesystem.  It will be used at some point in the future.

The L2ARC usage is transparent to the filesystem so it works with Lustre today.

Cheers, Andreas


On Sep 7, 2015, at 06:14, Fernando Perez  wrote:

Dear Lustre experts,

I have some questions about migrate OSTs to ZFS backend.

We have a Lustre filesystem with 200 TB and ten OSTs with lustre 2.4.1. Due to 
hardware problems in some OSTs disks we are planning to change these disks and 
configure the new ones (server + JBOD) with ZFS backend.

I have some questions about this:

- I have seen LU-4009 about ZFS ZIL. Does it mean that we should configure the 
zfs filesystem osts without ZIL dedicated ssds?
- Is L2ARC cache supported in Lustre?

Regards.

--
=
Fernando Pérez
Institut de Ciències del Mar (CMIMA-CSIC)
Departament Oceanografía Física i Tecnològica
Passeig Marítim de la Barceloneta,37-49
08003 Barcelona
Phone:  (+34) 93 230 96 35
=

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Re: [lustre-discuss] Migrate OSTs to ZFS

[Dilger, Andreas]

The ZIL is not currently used by Lustre OSTs or MDTs since it needs specific 
support in the filesystem.  It will be used at some point in the future. 

The L2ARC usage is transparent to the filesystem so it works with Lustre today. 

Cheers, Andreas

> On Sep 7, 2015, at 06:14, Fernando Perez  wrote:
> 
> Dear Lustre experts,
> 
> I have some questions about migrate OSTs to ZFS backend.
> 
> We have a Lustre filesystem with 200 TB and ten OSTs with lustre 2.4.1. Due 
> to hardware problems in some OSTs disks we are planning to change these disks 
> and configure the new ones (server + JBOD) with ZFS backend.
> 
> I have some questions about this:
> 
> - I have seen LU-4009 about ZFS ZIL. Does it mean that we should configure 
> the zfs filesystem osts without ZIL dedicated ssds?
> - Is L2ARC cache supported in Lustre?
> 
> Regards.
> 
> -- 
> =
> Fernando Pérez
> Institut de Ciències del Mar (CMIMA-CSIC)
> Departament Oceanografía Física i Tecnològica
> Passeig Marítim de la Barceloneta,37-49
> 08003 Barcelona
> Phone:  (+34) 93 230 96 35
> =
> 
> ___
> lustre-discuss mailing list
> lustre-discuss@lists.lustre.org
> http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
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