> -----Original Message----- > From: ceph-devel-owner@xxxxxxxxxxxxxxx [mailto:ceph-devel- > owner@xxxxxxxxxxxxxxx] On Behalf Of Blinick, Stephen L > Sent: Wednesday, August 19, 2015 6:58 PM > > [.. > Regarding the all-HDD or high density HDD nodes, is it certain these issues > with tcmalloc don't apply, due to lower performance, or would it potentially > be something that would manifest over a longer period of time > (weeks/months) of running? I know we've seen some weirdness attributed > to tcmalloc on our 10-disk 20-node cluster with HDD's & SSD journals, but it > took a few weeks. And it takes me just a few minutes with rados bench to reproduce this issue on mixed-storage node (SSDs, SAS disks, high-capacity SATA disks, etc). See here: http://ceph.predictor.org.pl/cpu_usage_over_time.xlsx It gets even worse when rebalancing starts... With best regards / Pozdrawiam Piotr Dałek ��.n��������+%������w��{.n����z��u���ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f
