Re: [ceph-users] KVM problems when rebalance occurs

Hi, benchmarking is done via fio and different blocksizes. I compared with benchmarks I did before the ceph.conf change and encountered very similar numbers. Thanks for the hint with mysql benchmarking. I will try it out. Cheers Nick On Friday, January 08, 2016 06:59:13 AM Josef Johansson

Re: [ceph-users] KVM problems when rebalance occurs

Hi, How did you benchmark? I would recommend to have a lot of mysql with a lot of innodb tables that are utilised heavily. During a recover you should see the latency rise at least. Maybe using one of the tools here https://dev.mysql.com/downloads/benchmarks.html Regards, Josef On 7 Jan 2016

[ceph-users] KVM problems when rebalance occurs

Heya, we are using a ceph cluster (6 Nodes with each having 10x4TB HDD + 2x SSD (for journal)) in combination with KVM virtualization. All our virtual machine hard disks are stored on the ceph cluster. The ceph cluster was updated to the 'infernalis' release recently. We are experiencing

Re: [ceph-users] KVM problems when rebalance occurs

-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 There has been a lot of "discussion" about osd_backfill_scan[min,max] lately. My experience with hammer has been opposite that of what people have said before. Increasing those values for us has reduced the load of recovery and has prevented a lot

Re: [ceph-users] KVM problems when rebalance occurs

Hi, Also make sure that you optimize the debug log config. There's a lot on the ML on how to set them all to low values (0/0). Not sure how it's in infernalis but it did a lot in previous versions. Regards, Josef On 6 Jan 2016 18:16, "Robert LeBlanc" wrote: > -BEGIN