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<TITLE>Re: [Lustre-discuss] OST failover</TITLE>
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Hi,<BR>
<BR>
You interconnect OSS1 and OSS2, OSS2 and OSS3, OSS3 and OSS4, and OSS4 and OSS1 together via an out-of-band communication fabric, install Linux-HA heartbeat software to monitor mount points, and configure nodes to take over each other’s mounts in case of failure.<BR>
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The implementation I have here uses only single point-to-point links between OSS pairs (there is no crossover between failover partners) but the princple is the same; your implementation should work pretty much the same way, with a few minor differences. I’m assuming you’ve got unused NICs on your OSSes, so if you connect those to a standard GigE edge switch protected by UPS, you can create an HA fabric which will give you the coverage you need. <BR>
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Lustre itself doesn’t support failover natively, you need to implement any failover using a third-party package; most of us out there use Linux-HA to great effect.<BR>
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cheers,<BR>
Klaus<BR>
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On 8/27/08 2:30 AM, "sd a" <ewsdas@gmail.com>did etch on stone tablets:<BR>
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</SPAN></FONT><BLOCKQUOTE><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'>Hi the list,<BR>
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I have 4 OSS servers , each OSS has 1 gigabit network interface and 2 OSTs, first OST use /dev/sdb1, second OST use /dev/sdb2.<BR>
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OSS1: OST1 & OST2<BR>
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OSS2: OST3 & OST4<BR>
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OSS3: OST5 & OST6<BR>
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OSS4: OST7 & OST8<BR>
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<BR>
Each file is striped across 4 OSTs : OST1,2,3,4 <BR>
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And I want to setup failover as:<BR>
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OST2 failover with OST3<BR>
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OST4 failover with OST5<BR>
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OST6 failover with OST7<BR>
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OST8 failover with OST1<BR>
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How do I do?<BR>
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Thanks.<BR>
<BR>
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