[Lustre-discuss] move ost in a new oss

[Antonio Concas]

Hi Brian,
Each oss has 32 Gb of RAM,
and my hope is to reduce the per OSS OST.

so, the only thing that i've to do is to
"Use the writeconf command to erase the configuration logs for the file 
system.
On the MDT"

and after that mount ost on new oss?

is'it correct?

thanks

Antonio

Brian J. Murrell wrote:
> On Mon, 2009-11-02 at 21:29 +0100, Antonio Concas wrote: 
>   
>> Hi all,
>>     
>
> Hi,
>
>   
>> i'm using lustre 1.8.1.1 with 4 OSS each of which mounts 10 ost ,
>>     
>
> Wow.  10 OSTs.  These OSSes have lots of memory, right?  With 10 OSTs,
> you have 4G of memory being used just for journals.
>
>   
>> i'm trying to use 2 more OSS, and i'd like to move some ost already in 
>> use in the new oss.
>>     
>
> Are you actually relocating or just expanding?  (i.e. will the OSTs on
> the existing OSSes remain?)  Or is your hope to reduce the per OSS OST
> count by adding more OSSes and keeping the OST count the same and just
> point LUNS at new OSSes?
>
> If you are expanding, I'd just create the new OSTs and start doing some
> "poor mans rebalanceing" to move files on to the new OSTs.
>
> If you are doing the latter and just creating more OSSes for existing
> OSTs, then you will need to follow the procedure in the manual for
> changing a NID.
>
> b.
>
>   
> ------------------------------------------------------------------------
>
> _______________________________________________
> Lustre-discuss mailing list
> Lustre-discuss at lists.lustre.org
> http://lists.lustre.org/mailman/listinfo/lustre-discuss
>