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Thank you everyone !
I'll do some tests monday and tell you if I could fix that stuff.
On Fri, Mar 12, 2010 at 11:16 PM, Lars Ellenberg
> On Fri, Mar 12, 2010 at 10:38:27AM +0100, Olivier LAMBERT wrote:
>> Ok, so after reading that :
>> Where you talking about cache consistency, you think the problem might
>> be on the Dell PowerVault MD1000 SAS ?
> Above DRBD layer.
> Not below.
> I'm still guessing here.
> But here is what I _know_.
> DRBD replicates whatever is written to it.
> This is proven in the real world.
> LINBIT would not exist if it did not.
> So that cannot be the problem.
> You observe that data written on some iscsi client
> to a target on top of DRBD is not (immediately) visible
> from some other iscsi client.
> This I have to believe you.
> Which leaves me at:
> either the data in question does not reach DRBD,
> or someone who is supposed to read from DRBD does not,
> because some layer in between servers "cached" data
> which happens to be stale content.
> Does that make sense?
>> Sorry, but sometimes only "cache consistency" is too vague for me...
> We also do consulting, workshops,
> project guidance and monitoring,
> and in general support ;)
> : Lars Ellenberg
> : LINBIT | Your Way to High Availability
> : DRBD/HA support and consulting http://www.linbit.com
> DRBD® and LINBIT® are registered trademarks of LINBIT, Austria.
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