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List:       lustre-discuss
Subject:    [Lustre-discuss] Software RAID support
From:       braam () clusterfs ! com (Peter Braam)
Date:       2006-12-21 13:55:03
Message-ID: 458AF4A2.3090602 () clusterfs ! com
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Hi,

Lustre network RAID0 is available now (and has been for years).  Network 
RAID1 is essentially equally difficult as the general problem, we do not 
know if it will be done late 2007, but it is under development.

- Peter -

Lin Shen (lshen) wrote:
> Will LAID be available by end of 2007? If not, how hard is it to add
> only RAID 0 and 1 across nodes?
>
> Thanks
> lin 
>
>   
>> -----Original Message-----
>> From: Andreas Dilger [mailto:adilger@clusterfs.com] 
>> Sent: Tuesday, December 05, 2006 11:41 PM
>> To: Lin Shen (lshen)
>> Cc: lustre-discuss@clusterfs.com
>> Subject: Re: [Lustre-discuss] Software RAID support
>>
>> On Dec 05, 2006  16:58 -0800, Lin Shen (lshen) wrote:
>>     
>>> The FAQ says that Lustre supports software RAID. Is the 
>>>       
>> software RAID 
>>     
>>> cluster aware? Can I put two partitions from two different 
>>>       
>> nodes into 
>>     
>>> the same RAID set?
>>>       
>> No.  The cluster-aware RAID feature (Lustre RAID = LAID) is 
>> only in the planning stages.
>>
>> This is only indicating that Lustre can use MD RAID{0,1,5} 
>> devices for a back-end OST or MDT filesystem.  That said, 
>> there was a bug just found with Lustre OSTs and software RAID 
>> 5 (bug 11313) if you are planning on using software RAID 5 
>> you need a patch.
>>
>> Cheers, Andreas
>> --
>> Andreas Dilger
>> Principal Software Engineer
>> Cluster File Systems, Inc.
>>
>>     
>
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>   
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