SSD IO performance

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Hi ALL:
    I've built a ceph0.8 cluster including 2 nodes ,which  contains 5 osds(ssd) each , with 100MB/s network . Testing a rbd device with default configuration ,the result is no ideal.To got better performance ,except the capability of random r/w  of  SSD, which should to give a change? 
     
    2 nodes  5 osds(SSD) *2  , 1 mon, 32GB RAM 
    100MB/S network
and now the whole iops is just 500 . Should we change the filestore or journal part ? Thanks for any help!
  


lixuehui555 at 126.com
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