Hi Udo, Lindsay did this for performance reasons so that the data is spread evenly over the disks, I believe it has been accepted that the remaining 2tb on the 3tb disks will not be used. Nick -----Original Message----- From: ceph-users [mailto:ceph-users-bounces@xxxxxxxxxxxxxx] On Behalf Of Udo Lembke Sent: 05 January 2015 07:15 To: Lindsay Mathieson Cc: ceph-users@xxxxxxxx >> ceph-users Subject: Re: Improving Performance with more OSD's? Hi Lindsay, On 05.01.2015 06:52, Lindsay Mathieson wrote: > ... > So two OSD Nodes had: > - Samsung 840 EVO SSD for Op. Sys. > - Intel 530 SSD for Journals (10GB Per OSD) > - 3TB WD Red > - 1 TB WD Blue > - 1 TB WD Blue > - Each disk weighted at 1.0 > - Primary affinity of the WD Red (slow) set to 0 the weight should be the size of the filesystem. With weight 1 for all disks, you run in trouble if your cluster filled, because the 1TB-Disks are full, before the 3TB disk! You should have something like 0.9 for the 1TB and 2.82 for the 3TB disks ( "df -k | grep osd | awk '{print $2/(1024^3) }' " ). Udo _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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