Re: [Linux-HA] iSCSI corruption during interconnect failure with pacemaker+tgt+drbd+protocol C

2013-11-19 Thread Lars Ellenberg
On Wed, Nov 13, 2013 at 03:10:07AM +, Jefferson Ogata wrote: Here's a problem i don't understand, and i'd like a solution to if possible, or at least i'd like to understand why it's a problem, because i'm clearly not getting something. I have an iSCSI target cluster using CentOS 6.4 with

Re: [Linux-HA] drbd/pacemaker multiple tgt targets, portblock, and race conditions (long-ish)

2013-11-19 Thread Lars Ellenberg
On Wed, Nov 13, 2013 at 09:02:47AM +0300, Vladislav Bogdanov wrote: 13.11.2013 04:46, Jefferson Ogata wrote: ... In practice i ran into failover problems under load almost immediately. Under load, when i would initiate a failover, there was a race condition: the iSCSILogicalUnit RA will

Re: [Linux-HA] Heartbeat errors related to Gmain_timeout_dispatch at low traffic

2013-11-19 Thread Lars Ellenberg
On Thu, Nov 14, 2013 at 04:46:16PM +0530, Savita Kulkarni wrote: Hi, Recently we are seeing lots of heartbeat errors related to Gmain_timeout_dispatch on our system. I checked on mailing list archives if other people have faced this issue. There are few email threads regarding this but

Re: [Linux-HA] Ping domain

2013-11-19 Thread Lars Ellenberg
On Tue, Nov 19, 2013 at 10:02:45AM +0200, Brent Clark wrote: Good day. I would like to ask, if you can supply a domain for ping in ha.cf. If anyone can assist, it would be appreciated. I'm not exactly sure what you are asking here, but maybe this helps:

Re: [Linux-HA] Ping domain

2013-11-19 Thread Brent Clark
Good day Thank you for replying. Brent On 19/11/2013 13:01, Lars Ellenberg wrote: On Tue, Nov 19, 2013 at 10:02:45AM +0200, Brent Clark wrote: Good day. I would like to ask, if you can supply a domain for ping in ha.cf. If anyone can assist, it would be appreciated. I'm not exactly sure

Re: [Linux-HA] iSCSI corruption during interconnect failure with pacemaker+tgt+drbd+protocol C

2013-11-19 Thread Jefferson Ogata
On 2013-11-19 09:32, Lars Ellenberg wrote: On Wed, Nov 13, 2013 at 03:10:07AM +, Jefferson Ogata wrote: Here's a problem i don't understand, and i'd like a solution to if possible, or at least i'd like to understand why it's a problem, because i'm clearly not getting something. I have an

Re: [Linux-HA] drbd/pacemaker multiple tgt targets, portblock, and race conditions (long-ish)

2013-11-19 Thread Jefferson Ogata
On 2013-11-19 10:48, Lars Ellenberg wrote: On Wed, Nov 13, 2013 at 09:02:47AM +0300, Vladislav Bogdanov wrote: 13.11.2013 04:46, Jefferson Ogata wrote: ... In practice i ran into failover problems under load almost immediately. Under load, when i would initiate a failover, there was a race

Re: [Linux-HA] drbd/pacemaker multiple tgt targets, portblock, and race conditions (long-ish)

2013-11-19 Thread Jefferson Ogata
On 2013-11-13 06:02, Vladislav Bogdanov wrote: 13.11.2013 04:46, Jefferson Ogata wrote: [snip] 4. Insufficient privileges faults in the portblock RA. This was another race condition that occurred because i was using multiple targets, meaning that without a mutex, multiple portblock invocations

Re: [Linux-HA] drbd/pacemaker multiple tgt targets, portblock, and race conditions (long-ish)

2013-11-19 Thread Vladislav Bogdanov
19.11.2013 13:48, Lars Ellenberg wrote: On Wed, Nov 13, 2013 at 09:02:47AM +0300, Vladislav Bogdanov wrote: 13.11.2013 04:46, Jefferson Ogata wrote: ... In practice i ran into failover problems under load almost immediately. Under load, when i would initiate a failover, there was a race