I have a CEPH cluster with 9 nodes (6 data nodes & 3 mon/mds nodes) And i setup 4 separate nodes to test performance of Rados-GW: - 2 node run Rados-GW - 2 node run multi-process put file to [multi] Rados-GW
Result: a) When i use 1 RadosGW node & 1 upload-node, speed upload = 50MB/s /upload-node, Rados-GW input/output speed = 50MB/s b) When i use 2 RadosGW node & 1 upload-node, speed upload = 50MB/s /upload-node; each RadosGW have input/output = 25MB/s ==> sum input/ouput of 2 Rados-GW = 50MB/s c) When i use 1 RadosGW node & 2 upload-node, speed upload = 25MB/s /upload-node ==> sum output of 2 upload-node = 50MB/s, RadosGW have input/output = 50MB/s d) When i use 2 RadosGW node & 2 upload-node, speed upload = 25MB/s /upload-node ==> sum output of 2 upload-node = 50MB/s; each RadosGW have input/output = 25MB/s ==> sum input/ouput of 2 Rados-GW = 50MB/s *Problem*: i can pass limit 50MB/s when put file over Rados-GW, regardless of the number Rados-GW nodes and upload-nodes. When i use this CEPH cluster over librados (openstack/kvm), i can easily achieve > 300MB/s I don't know why performance of RadosGW is so low. What's bottleneck? Thank you very much!
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