[Lustre-discuss] Has anyone had experience with heartbeat and drdbd providing full redundancy on lustre clusters

[Christopher Deneen]

What about a redundant system for the OSS's (assuming some lower level
redundancy for OST's like raid)

On Fri, Apr 24, 2009 at 1:59 AM, Heiko Schröter
<schroete at iup.physik.uni-bremen.de> wrote:
> On Donnerstag, 23. April 2009 14:57:34 Thomas Roth wrote:
>
> We are using heartbeat (including stonith) and drbd for our MDT/MGS system.
> The procedure and setup has been posted to this list.
> The system works fine in our scenario and we haven't encountered any problems
> so far. Total Storage capacity is 110TB (51% full) with 8 OSS Raids.
> Heartbeat is a beast when it comes to configure all possible events. This might
> be your problem that you have to tell heartbeat _explicitly_ what to do when
> it recovers from _certain_ failover. There are some values to look for in the
> config file.
>
> Heiko
>
>> Hi,
>>
>> we are using Heartbeat+DRBD on our MGS/MDT.
>> DRBD work fine, we have been using it for backing up the MDT, upgrading
>> the Lustre version, and of course for failover.
>> Heartbeat proves to be much trickier. Since our network is rather shaky,
>> we are suffering from late heartbeats, Heartbeat trying to fail over for
>> no apparent reason, Stonith for no good reason... In addition, if one
>> umounts the MDT, it always starts with a delay of 330sec, and Hearbeat
>> always gives up on the resource MDT after 20000ms - no matter what I put
>> into the cib.xml, no matter the Lustre timeouts. So one always needs to
>> force the umount or more likely a reboot - not a problem with a reliable
>> Stonith-procedure ;-)
>>
>> Thomas
>>
>> Christopher Deneen wrote:
>> > trying to get a feel if it's worth investing time to implement.
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>
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