On 21 August 2011 12:34, Yan Chunlu <springri...@gmail.com> wrote: > since "nodetool cleanup" could remove hinted handoff, will it cause the > data loss?
Hi Yan, Hints are not guaranteed to be delivered and "nodetool cleanup" is one of the reasons for that. This will only cause data-loss if you are writing at CL.ANY where a hint counts as a write. If you are writing at CL.ONE or above then at least one replica must receive the data for the write to succeed, so losing hints will not cause data-loss. If a hint is not delivered then the replica to which it was intended will become consistent after a read-repair, or after manual anti-entropy repair. Sam -- Sam Overton Acunu | http://www.acunu.com | @acunu
