Dell - Internal Use - Confidential Hi, I read in the ceph documentation that one of the main performance snags in ceph was running the OSDs and journal files on the same disks and you should consider at a minimum running the journals on SSDs. Given I am looking to design a 150 TB cluster, I’m considering the following configuration for the storage nodes No of replicas: 3 Each node · 18 x 1 TB for storage (1 OSD per node, journals for each OSD are stored to volume on SSD) · 2 x 512 GB SSD drives configured as RAID 1 to store the journal files (assuming journal files are not replicated, correct me if Im wrong) · 2 x 300 GB drives for OS/software (RAID 1) · 48 GB RAM · 2 x 10 Gb for public and storage network · 1 x 1 Gb for management network · Dual E2660 CPU No of nodes required for 150 TB = 150*3/(18*1) = 25 Unfortunately I don’t have any metrics on the throughput into the cluster so I can’t tell whether 512 GB for journal files will be sufficient so it’s a best guess and may be overkill. Also, any concerns regarding number of OSDs running on each node, ive seen some articles on the web saying the sweet spot is around 8 OSDs per node? Thanks Ian Dell Corporation Limited is registered in England and Wales. Company Registration Number: 2081369 |
_______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
