On Wed, Jun 19, 2013 at 4:35 PM, Wei Zhu <wz1...@yahoo.com> wrote: > I was not aware of that. So we can avoid repair if there is no hardware > failure...I found a blog: > > http://www.datastax.com/dev/blog/modern-hinted-handoff
Well... yes but no. First, I do not believe that hardware failure is required, I believe that software failure can create a case where you have lost a hint. But presuming that you do not get an exception back at the client side and neither your software or hardware has failed/crashed, hints "should" be reliable. However, hinted handoff is not "officially" considered for consistency purposes, it is considered an optimization for repair. @JamesLee : If you have seen your hints be 100% delivered on all nodes and are still missing data, file a JIRA ticket with : 1) the environment in which you are experiencing this issue (cassandra ver, os ver, jvm version) 2) an explanation of how you generated the write workload that manifests this behavior 3) what you expect to see versus what you actually see Thanks! =Rob
