Hey Shi Yu, Some questions of yours are answered at this comment: https://issues.apache.org/jira/browse/HDFS-1623?focusedCommentId=13215309&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13215309 (and below) and at was tracked at https://issues.apache.org/jira/browse/HDFS-3010
The version of HA available already does work reasonably well, although my own personal tests with DFS+HBase were local and not long-running (as they may call it, "non-prod"). Unsure on what you mean by recovery exactly. However, 2.0.0 is a release yet to be prepared, but should come out soon per recent activity on the general lists (branch-2 is your best shot for now for the latest usable HDFS). Docs for available HA in 0.23.1 is available in the tar, or https://issues.apache.org/jira/secure/attachment/12513484/HDFSHighAvailability.html. Doesn't look like it was compiled/linked onto the 0.23.1 live docs, though it was present. Do give it a whirl and let us know! Also checkout https://issues.apache.org/jira/browse/HDFS-3042 for the remaining part of failover work. On Thu, May 3, 2012 at 7:58 PM, Shi Yu <sh...@uchicago.edu> wrote: > It sounds like an exciting feature. Does anyone have tried this in practice? > How does the hot standby namenode perform and how reliable is the HDFS > recovery? Is it now a good chance to migrate to 2.0.0, in your opinions? > > Best, > > Shi > -- Harsh J
