Do not use Samsung 850 PRO for journal Just use LSI logic HBA (eg. SAS2308) -----Original Message----- From: Muhammad Junaid [mailto:junaid.fsd.pk@xxxxxxxxx] Sent: donderdag 6 september 2018 13:18 To: ceph-users@xxxxxxxxxxxxxx Subject: help needed Hi there Hope, every one will be fine. I need an urgent help in ceph cluster design. We are planning 3 OSD node cluster in the beginning. Details are as under: Servers: 3 * DELL R720xd OS Drives: 2 2.5" SSD OSD Drives: 10 3.5" SAS 7200rpm 3/4 TB Journal Drives: 2 SSD's Samsung 850 PRO 256GB each Raid controller: PERC H710 (512MB Cache) OSD Drives: On raid0 mode Journal Drives: JBOD Mode Rocks db: On same Journal drives My question is: is this setup good for a start? And critical question is: should we enable write back caching on controller for Journal drives? Pls suggest. Thanks in advance. Regards. Muhammad Junaid _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
 |