Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On 12/17/2012 08:27 PM, Prater, James K. wrote: > > > > > > > I have a real sticky problem and would appreciate if anyone has insight. > > > > > > We currently have the following physical configuration > > > > 2) Dell PowerEdge R710 (dual 6-core with hyperthreading enabled) > > 120Gbytes of memory each That's quite a lot ... you also tuned vm.dirty_background_bytes and vm.dirty_bytes to a reasonable low value? .... to avoid regular heavy data write-out.... Regards, Andreas -- Need help with DRBD? http://www.hastexo.com/now > > 4x 10GE Nics (2-bonded for NFS and 2-bonded for Replication) > Broadcom 57711. > > 4x 8Gbit FC HBAs which are tied to a dual controller NEXSAN E60 > array (controllers in non-redundant mode), each controller has 4Gbytes > of memory. > > Raw throughput is around 340Mbytes/sec per volume. > > > > Each system is running RHEL 6.3 with heartbeat and now with > DRBD-8.4.2, problem was there with 8.4.0 (could not get 8.4.1 to work). > > System configured as Active/Passive pair with EXT4 and the filesystem, > barriers off. Filesystems exported via NFS to vSphere 4.1 clients. > > > > Main problem is that everything works for most of the time but every > now and then a resource stall (high load average and no I/O) occurs which > > Is not good for running VMs. Has anyone seen this? No errors > recorded just no I/O and high load for a few minutes (3-4). This has > been driving > > me crazy. One more thing, these events do not occur with > “replication disabled” i.e. drbdadm down all (on the peer member). > I have adjusted > > many sysctl parameters (up memory buffers , etc) , changed I/O > schedulers and turned on and off hyperthreading and still have the issue. > > > > > > Thanks in advance. > > > > > > James > > > > > > > > > > > > > > > > _______________________________________________ > drbd-user mailing list > drbd-user at lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user > -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 222 bytes Desc: OpenPGP digital signature URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20121218/ad75d198/attachment.pgp>