Re: Does Hedged-read usually happen in real workloads?

2019-08-19 Thread Wei-Chiu Chuang
On Mon, Aug 19, 2019 at 5:30 AM Daegyu Han wrote: > Hi all, > > To my understand, Hedged-Read is a technique for copying IO to a replica > when pread () is delayed to mitigate IO latency such as speculative > execution in MapReduce. > > - Does Hedged-read really happen where it uses hbase

Re: Does Hedged-read usually happen in real workloads?

2019-08-19 Thread Stack
On Mon, Aug 19, 2019 at 5:30 AM Daegyu Han wrote: > Hi all, > > To my understand, Hedged-Read is a technique for copying IO to a replica > when pread () is delayed to mitigate IO latency such as speculative > execution in MapReduce. > > The release note on the feature has a pretty good

Does Hedged-read usually happen in real workloads?

2019-08-19 Thread Daegyu Han
Hi all, To my understand, Hedged-Read is a technique for copying IO to a replica when pread () is delayed to mitigate IO latency such as speculative execution in MapReduce. - Does Hedged-read really happen where it uses hbase databases? - Does hedged-read often occur because of a bottleneck in