Re: [DRBD-user] Dual-primary to single node

2012-01-17 Thread Andreas Kurz
Hello, On 01/13/2012 10:59 AM, Luis M. Carril wrote: Hello, I´m new to DRBD and I think that I have a mess with some concepts and policies. I have setup a two node cluster (of virtual machines) with a shared volume in dual primary mode with ocfs2 as a basic infrastructure for some

Re: [DRBD-user] Dual-primary to single node

2012-01-17 Thread Digimer
On 01/13/2012 04:59 AM, Luis M. Carril wrote: Hello, I´m new to DRBD and I think that I have a mess with some concepts and policies. Welcome! DRBD is a bit different from many storage concepts, so it takes a bit to wrap your head around. However, careful not to overthink things... It's

Re: [DRBD-user] Dual-primary to single node

2012-01-17 Thread CAMPBELL Robert
Luis, I have experienced the same problems, what helped was to 'fence' the other node by forcing it into a reboot. I don't quite know why it worked (worrying) but I found that if I fenced the other node, I was not getting any more time-outs on the drbd block device, which I think is what you

Re: [DRBD-user] Dual-primary to single node

2012-01-17 Thread Digimer
On 01/17/2012 11:07 AM, CAMPBELL Robert wrote: Luis, I have experienced the same problems, what helped was to 'fence' the other node by forcing it into a reboot. I don't quite know why it worked (worrying) but I found that if I fenced the other node, I was not getting any more time-outs

Re: [DRBD-user] Dual-primary to single node

2012-01-17 Thread Digimer
On 01/17/2012 12:32 PM, Luis M. Carril wrote: Hello, Ok, the fencing and splitbrain mechanisms only enter to play when both nodes meet again after some failure. So... meanwhile the nodes doesn´t connect their peer they disallow IO to the volume? Regards No, if both nodes go

Re: [DRBD-user] Dual-primary to single node

2012-01-17 Thread Luis M. Carril
El 17/01/2012 18:56, Digimer escribió: On 01/17/2012 12:32 PM, Luis M. Carril wrote: Hello, Ok, the fencing and splitbrain mechanisms only enter to play when both nodes meet again after some failure. So... meanwhile the nodes doesn´t connect their peer they disallow IO to the

Re: [DRBD-user] Dual-primary to single node

2012-01-17 Thread Digimer
On 01/17/2012 01:09 PM, Luis M. Carril wrote: El 17/01/2012 18:56, Digimer escribió: On 01/17/2012 12:32 PM, Luis M. Carril wrote: Hello, Ok, the fencing and splitbrain mechanisms only enter to play when both nodes meet again after some failure. So... meanwhile the nodes