[Lustre-discuss] lustre startup sequence Re: OSTs not activating following MGS/MDS move

[Jones, Peter A]

Colin

Could you please open an LUDOC JIRA ticket to track this correction?

Thanks

Peter

On 3/7/13 8:48 AM, "Colin Faber" <colin_faber at xyratex.com> wrote:

>Hi Yes,
>
>Thanks for finding this Alex. The manual should be updated with the
>correct order.
>
>-cf
>
>
>
>On 03/07/2013 09:39 AM, Alex Kulyavtsev wrote:
>> Hi Colin.
>> This is not what the manual says.
>>
>> Shall it be corrected then? Or, add description for startup sequence
>> in different situations (first start, restart).
>>
>> The manual (or online information) does not describe graceful shutdown
>> sequence for separate MGS/MDT configuration, it will be nice to add
>> that too.
>>
>> Alex.
>>
>> E.g.
>> 
>>http://wiki.lustre.org/manual/LustreManual20_HTML/LustreOperations.html#5
>>0438194_24122
>> and similar
>> 
>>http://build.whamcloud.com/job/lustre-manual/lastSuccessfulBuild/artifact
>>/lustre_manual.xhtml#dbdoclet.50438194_24122
>>>
>>>
>>>     13.2 Starting Lustre
>>>
>>> The startup order of Lustre components depends on whether you have a
>>> combined MGS/MDT or these components are separate.
>>>
>>>   * If you have a combined MGS/MDT, the recommended startup order is
>>>     OSTs, then the MGS/MDT, and then clients.
>>>
>>>   * If the MGS and MDT are separate, the recommended startup order
>>>     is: *MGS, then OSTs, then the MDT, and then clients.*
>>>
>>
>>
>>
>> On Mar 7, 2013, at 9:51 AM, Colin Faber wrote:
>>
>>> Hi Christopher,
>>>
>>> In general this can happen when your initial remount of the various
>>> services is in thewrong order.
>>>
>>> Such as MGS -> OST -> MDT -> Client. or MGS -> MDT -> Clients -> OST,
>>> etc.
>>>
>>> During initial mount and registration it's critical that your mount be
>>> in the correct order:
>>>
>>> MGS -> MDT -> OST(s) -> Client(s)
>>>
>>> CATALOG corruption, or out of order sequence is more rare on active
>>>file
>>> system, but is possible. The simple fix here as described below is to
>>> just truncate it and all should be well again.
>>>
>>> -cf
>>>
>>> ailing list
>>> Lustre-discuss at lists.lustre.org
>>><mailto:Lustre-discuss at lists.lustre.org>
>>> http://lists.lustre.org/mailman/listinfo/lustre-discuss
>>
>>
>>
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