61–62 of 62 posts
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I really don't understand that fight. SAN storage and VmWare (ESXi) have been around forever. VmWare will gladly provision VMs over any SAN storage. Live migration has been available for more than 10 years (that's called VMotion and it requires any of paid edition). Prefer local storage? Put any sort of local storage on the server, VmWare will gladly provision VM on it. What's the most important thing in a storage...…
Huh? I'm not sure I understand.
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> Ceph might be more usable after Bluestore comes along (at the moment erasure coding performance seems to be pretty bad, even with an SSD cache) I just saturated a 10Gb link in a k=4,m=2 EC configuration on Ceph (Haswell). Too lazy to set up concurrent clients. What do you mean by pretty bad? This is a Hammer cluster without SSD journals or cache. Bluestore was recently released with Jewel, but shouldn't affect EC p…
Maybe I'm doing something horribly wrong. My setup was: - 6x4TB HDD - 2x120GB SSD - OSD per disk - k=4,m=2 erasure coded HDD pool - 1 copy replicated (not) SSD pool - SSD pool writeback cache for HDD pool I was consistently seeing the SSD writeback cache fill up then the disks thrashed at 100% IO utilization, limiting incoming writes to ~40MB/s from memory.
You will be a lot better off using bcache or similar, on top of the OSD device.