Hi,Alex.Here comes the new update: We apply cache='writeback' to the vm. then the performance improve,however, not quite much,the speed is 9.9MB/s,increased by 3.9MB/s. any other advise for us? thanks a lot. Best regards. -- Allen 在 2013-06-28 15:54:07，"Alex Bligh" <alex@xxxxxxxxxxx> 写道： > >On 28 Jun 2013, at 08:41, 华仔 wrote: > >> write speed: wget http://remote server ip/2GB.file , we get a write speed at an average speed of 6MB/s.(far behind expected) >> (we must get something wrong there, we would appreciate a lot if any help comes from you. we think the problems comes from the kvm emulator, but we are not sure, can you give us some advice to improve our vm's disk performance in the aspect of writing speed?) > >Are you using cache=writeback on your kvm command line? What about librbd caching? What versions of kvm & ceph? > >-- >Alex Bligh > > > > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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