I am trying to test replicated ceph with servers in different buildings, and I have a read problem. Reads from one building go to osd in another building and vice versa, making reads slower then writes! Making read as slow as slowest node.
Is there a way to - disable parallel read (so it reads only from the same osd node where mon is); - or give each client read restriction per osd? - or maybe strictly specify read osd on mount; - or have node read delay cap (for example if node time out is larger then 2 ms then do not use such node for read as other replicas are available). - or ability to place Clients on the Crush map - so it understands that osd in - for example osd in the same data-center as client has preference, and pull data from it/them. Mounting with kernel client latest mimic. Thank you! Vlad
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