Hi Tsz-Wo, I’ll check how HDFS supports reconfiguration in runtime. Filed an issue to track it: https://issues.apache.org/jira/browse/RATIS-1724 <https://issues.apache.org/jira/browse/RATIS-1724>.
William > 2022年10月11日 23:08，Tsz Wo Sze <[email protected]> 写道： > > Hi William, > > It is a great idea to support hot updates! Recall that HDFS does support > reconfiguration (hdfs dfsadmin -reconfig) to change configuration properties > in runtime. We might have a similar approach. > > Tsz-Wo > > > On Tue, Oct 11, 2022 at 8:01 PM William Song <[email protected] > <mailto:[email protected]>> wrote: > Hi, > > We are trying to impose resource restrictions (mainly memory/network) on > Ratis Server. However, configurations (such as bufferLimit of > PendingRequests) in RaftServerConfigKeys are fixed after starting up and we > cannot hot update them. > > Consider the scenario: when we detect that a single group becomes the > hotspot, we would like to increase its resource quota so that it can better > serve the peak traffic. A workaround is that we can estimate the peak value > and pre-allocate corresponding resource quote during start-up, but the extra > resources are wasted during normal traffic. Also, the estimation may not > always be accurate. > > Is it possible to dynamically hot update the resource quota? Or are there > other resolutions on above scenario? > > Regards, > William > >
