Lars, the work to complete this is happening over in https://issues.apache.org/jira/browse/HBASE-15531. Thiruvel and Francis are bringing to Apache what they have deployed in prod at Yahoo. I believe RegionPlacementMaintainer is not being run in their prod. Correct me if I am wrong, Thiruvel/Francis. Thanks, Devaraj. ________________________________________ From: Lars George <[email protected]> Sent: Wednesday, November 09, 2016 11:19 PM To: [email protected] Subject: Status of HBASE-4755?
Hi, I am wondering where https://issues.apache.org/jira/browse/HBASE-4755 is up to? Seeing this lasting many years now, why is it not closed? It seems the balancer is in place. What worries me is that the tool to recompute a missing region server location after a failover is having a comment like this (see the TODO below): /** * A tool that is used for manipulating and viewing favored nodes information * for regions. Run with -h to get a list of the options */ @InterfaceAudience.Private // TODO: Remove? Unused. Partially implemented only. public class RegionPlacementMaintainer { If everything is in place but the recomputation, which should be automated as discussed in the JIRA years ago, what is the hold up? Why do we have such a feature lingering away? Or let me ask the other way around: who is actively using this feature, and how are they doing it? Cheers, Lars
