[DRBD-user] Kernel hung on DRBD / MD RAID

2012-02-12 Thread Andreas Bauer
Hello, this morning I had a nasty situation on a Primary/Secondary DRBD cluster. First the setup: Kernel 3.1.0 / DRBD 8.4.11 KVM virtual machines, running on top of DRBD (protocol A, sndbuf-size 10M, data-integrity-alg md5, external meta data, meta data on different physical disk), running on

Re: [DRBD-user] drbd + flashcache

2012-02-12 Thread Pascal BERTON
>On Sat, Feb 11, 2012 at 7:30 PM, Pascal BERTON wrote: >> Florian, >> >> I've watched your video, very interesting indeed... Unfortunately for you it >> raised some more questions to me :-) >> First, just to be sure I correctly understood : flashcache will only (But >> significantly) improve read

Re: [DRBD-user] drbd + flashcache

2012-02-12 Thread Florian Haas
On Sat, Feb 11, 2012 at 7:30 PM, Pascal BERTON wrote: > Florian, > > I've watched your video, very interesting indeed... Unfortunately for you it > raised some more questions to me :-) > First, just to be sure I correctly understood : flashcache will only (But > significantly) improve read operati