Hi (your name?), first step.... how does your client look like ? WriteHandle writer = bookkeeper.createLedgerOp().....execute().get();
BAD WAY writer.append() ---> SYNC, will block until fsync on bookies !!! writer.append() ---> SYNC writer.append() ---> SYNC writer.append() ---> SYNC writer.append() ---> SYNC GOOD WAY writer.appendAsync() ---> ASYNC writer.appendAsync() ---> ASYNC writer.appendAsync() ---> ASYNC writer.appendAsync() ---> ASYNC writer.appendAsync() ---> ASYNC writer.appendAsync() ---> ASYNC writer.appendAsync().get() BLOCK ONLY ON THE last entry (or after a batch of X entries) Cheers Enrico Il giorno ven 6 lug 2018 alle ore 08:46 li.peng...@zhaopin.com.cn < li.peng...@zhaopin.com.cn> ha scritto: > > Hi > > I try to use bookkeeper. i care latency of write. so start a > test in single thread. get 400 ops/s in double SSD. > > how to improve performance to get the low-latency. > > Thanks. > > ------------------------------ > li.peng...@zhaopin.com.cn >
