Re: [CentOS] DRBD on a xen host: crash on high I/O

2009-07-29 Thread Andrea Dell'Amico
On Tue, 2009-07-28 at 14:31 -0400, William L. Maltby wrote: When the two hosts are in sync, if I activate more than a few (six or seven) xen guests, the master server crashes spectacularly and reboots. I've seen a kernel dump over the serial console, but the machine restarts

Re: [CentOS] DRBD on a xen host: crash on high I/O

2009-07-29 Thread Ross Walker
On Jul 29, 2009, at 7:52 AM, Andrea Dell'Amico adel...@sevenseas.org wrote: On Tue, 2009-07-28 at 14:31 -0400, William L. Maltby wrote: When the two hosts are in sync, if I activate more than a few (six or seven) xen guests, the master server crashes spectacularly and reboots. I've

Re: [CentOS] DRBD on a xen host: crash on high I/O

2009-07-29 Thread Andrea Dell'Amico
On Wed, 2009-07-29 at 09:55 -0400, Ross Walker wrote: I read on another forum how a user using iSCSI for domUs was experiencing network hangs due to the fact that dom0 didn't have enough scheduler credits to handle the network throughput. That might be related.

Re: [CentOS] DRBD on a xen host: crash on high I/O

2009-07-29 Thread Andrea Dell'Amico
On Wed, 2009-07-29 at 16:16 +0200, Andrea Dell'Amico wrote: On Wed, 2009-07-29 at 09:55 -0400, Ross Walker wrote: I'm pretty sure the crash is DRBD related: until the secondary drbd server is detached, all is working well. There are 23 guests running, right now, some of them paravirtualized,

Re: [CentOS] DRBD on a xen host: crash on high I/O

2009-07-29 Thread Ross Walker
On Jul 29, 2009, at 2:30 PM, Andrea Dell'Amico adel...@sevenseas.org wrote: On Wed, 2009-07-29 at 16:16 +0200, Andrea Dell'Amico wrote: On Wed, 2009-07-29 at 09:55 -0400, Ross Walker wrote: I'm pretty sure the crash is DRBD related: until the secondary drbd server is detached, all is

[CentOS] DRBD on a xen host: crash on high I/O

2009-07-28 Thread Andrea Dell'Amico
Hello, I have a couple of Dell 2950 III, both of them with CentOS 5.3, Xen, drbd 8.2 and cluster suite. Hardware: 32DB RAM, RAID 5 with 6 SAS disks (one hot spare) on a PERC/6 controller. I configured DRBD to use the main network interfaces (bnx2 driver), with bonding and crossover cables to

Re: [CentOS] DRBD on a xen host: crash on high I/O

2009-07-28 Thread William L. Maltby
On Tue, 2009-07-28 at 20:11 +0200, Andrea Dell'Amico wrote: Hello, I have a couple of Dell 2950 III, both of them with CentOS 5.3, Xen, drbd 8.2 and cluster suite. Hardware: 32DB RAM, RAID 5 with 6 SAS disks (one hot spare) on a PERC/6 controller. I configured DRBD to use the main network