[Gluster-users] Node Failure

[Anand Babu Periasamy]

Yes AFR's self healing ability is the best approach. Alternatively, if you have no write
activity or willing to suffer a downtime, you can use "cpio" to copy across volumes. 
"cpio" copies extended attributes as well.

--
Anand Babu Periasamy
GPG Key ID: 0x62E15A31
Blog [http://ab.freeshell.org]
The GNU Operating System [http://www.gnu.org]
Z RESEARCH Inc [http://www.zresearch.com]



Michael Messig wrote:
> We also considered such an approach, but could not be sure if this would 
> cause problems... It would definitely be an ideal way to restore a node 
> to maintain data integrity!
> 
> Any light on that would be great!
> 
> Mike
> 
> Keith Freedman wrote:
>> Raghavendra,
>>
>> I didn't chime in cause I wasn't sure this would work, but what I 
>> always envisioned in a similar situation is the following..  would 
>> this work?:
>>
>> set up a new node as a 2nd AFR node with an empty filesystem under 
>> gluster.
>> run the find/head  command and gluster will realize the local 
>> filesystem is behind on everything and will AFR the whole tree?
>>
>> To me, if this would work without risking data loss, this is an ideal 
>> way to restore a node.
>>
>> ??
>> Keith
>>
>>
>>
>> At 08:44 PM 8/10/2008, Raghavendra G wrote:
>>> Hi michael,
>>> some are inlined.
>>>
>>> On Mon, Aug 11 2008 at 5:29 AM, Michael Messig 
>>> <<mailto:michael.messig at sitepoint.com>michael.messig at sitepoint.com> 
>>> wrote:
>>> Hi Guys,
>>>
>>> I have two nodes set up using afr. Overnight the first machine died and
>>> i've had to rebuild it based on a copy of the second machine (they are
>>> both vm's).
>>>
>>>
>>> after  rebuild,  are the both nodes identical? If so, did you set 
>>> extended attributes appropriately for the files you repaired or 
>>> created (afr uses extended attributes to synchronise 
>>> files/directories b/w its children).
>>>
>>> Is there anything bad that will happen if I start the
>>> rebuilt first machine (i've changed the configuration accordingly)?
>>>
>>>
>>> Did you change the glusterfs configuration? If so, can you send the 
>>> configuration files before and after the failure?
>>>
>>> I.e
>>> will gluster just pick up on its merry way, get all the updates from the
>>> second machine that have occured since the copy and not destroy the
>>> filesystem?
>>>
>>> Thanks!
>>>
>>> Mike
>>>
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>>>
>>>
>>>
>>>
>>> -- 
>>> Raghavendra G
>>>
>>> A centipede was happy quite, until a toad in fun,
>>> Said, "Prey, which leg comes after which?",
>>> This raised his doubts to such a pitch,
>>> He fell flat into the ditch,
>>> Not knowing how to run.
>>> -Anonymous
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> 
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