[Lustre-discuss] Failover Setup MDS/MDT
Sheila Barthel
Sheila.Barthel at Sun.COM
Wed Jun 25 16:56:23 PDT 2008
In the current Lustre manual (v. 1_12), section 3.2.2 is Lustre Tools.
Section 21.3.2 is Calculating MDT Size, which includes an inode
calculation example and does not refer to the MDS.
http://manual.lustre.org/manual/LustreManual16_HTML/LustreTuning.html#50446384_pgfId-1291157
Please clarify which Lustre manual version you are referring to.
Sheila
Brian J. Murrell wrote:
> On Wed, 2008-06-25 at 14:29 +0200, Heiko Schroeter wrote:
>
>> Well yes ok, but what about the sizes of the partitions ?
>>
>> The docs present an example calculating the inode space needed on an 'MDS'.
>> (3.2.2 Calculating MDS Size)
>>
>
> That should technically be "MDT Size", not MDS size.
>
>
>> So when the MDS partitions
>>
>
> AKA MDTs.
>
>
>> holds the inodes of the lustre system what will be
>> the partition size of the MDT device ?
>>
>
> You are talking about two things that are in fact one and the same. The
> "MDS partition" is the MDT.
>
>
>> Or should it read 'MDT' partition size in the docs and the MDS partition size
>> doesn't matter at all ?
>>
>
> Indeed. Can you file a bugzilla ticket regarding that that bad use of
> MDS? I will see that it gets to the documentation team.
>
> Thanx,
> b.
>
>
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