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Hi !
I need a little help understanding reads from replicas. I've read a few conflicting messages and the documentation is not very clear to me on this subject (maybe I didn't find the proper doc). Here's the question: With default replication of 2 (size=2), when doing reads (big sequential reads in my case) are we expecting to see read going to the "primary" object AND it's replicas ? (similar to RAID1 where you read from both sides of the mirror) I'm not seeing that on my setup right now. I have a pool with 16 PGs on 2 OSDs. When I do reads only one 1 OSD gets IO. If that's normal (replica involved in IO only when primary is down) I'll take a note, otherwise I'll have to find why I don't get reads from replicas. Have a nice day, Dani |
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