Hi! I seen the documentation http://ceph.com/docs/master/start/hardware-recommendations/ but those minimum requirements without some recommendations don't tell me much ...
So, from what i seen for mon and mds any cheap 6 core 16+ gb ram amd would do ... what puzzles me is that "per daemon" construct ... Why would i need/require to have multiple daemons? with separate servers (3 mon + 1 mds - i understood that this is the requirement) i imagine that each will run a single type of daemon.. did i miss something? (beside that maybe is a relation between daemons and block devices and for each block device should be a daemon?) for mon and mds : would help the clients if these are on 10 GbE? for osd : i plan to use a 36 disk server as osd server (ZFS RAIDZ3 all disks + 2 ssds mirror for ZIL and L2ARC) - that would give me ~ 132 TB how much ram i would really need? (128 gb would be way to much i think) (that RAIDZ3 for 36 disks is just a thought - i have also choices like: 2 X 18 RAIDZ2 ; 34 disks RAIDZ3 + 2 hot spare) Regarding journal and scrubbing : by using ZFS i would think that i can safely not use the CEPH ones ... is this ok? Do you have some other advises and recommendations for me? (the read:writes ratios will be 10:1) Thank you!! Adrian
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