We have had several issues with decommissioning in recent past. Decommissioning takes long time and operations guys have no means to find out what is taking so long. This is a change in the namenode web UI that will greatly help hadoop users to monitor the status of decommissioning and to discover cause of 'long tails' in decommissioning. Brian Bockelman's comment on the jira (HDFS-758) confirms that 'long tails' in decommissioning have been a problem not only at Yahoo but also for other hadoop users. Therefore, this feature seems to be significant enough to be backported to 21 so that it is available for our users sooner rather than later. We have backported this change to yahoo distribution of hadoop-20 as well.
Thanks jitendra On 11/25/09 11:14 AM, "Allen Wittenauer" <awittena...@linkedin.com> wrote: > > -1 > > We're never going to see 0.21 if features keep getting backported. > > > On 11/24/09 9:44 PM, "Owen O'Malley" <owen.omal...@gmail.com> wrote: > >> +1 This sounds like useful information that will and has aided debugging. >> >> -- Owen >
