Thanks Ted. On Thu, Sep 18, 2014 at 3:34 PM, Ted Yu <yuzhih...@gmail.com> wrote:
> DFSClient would resume reading from where it stops from the next data node. > > Cheers > > On Thu, Sep 18, 2014 at 11:53 AM, Biju N <bijuatapa...@gmail.com> wrote: > > > It is for the duration of the restart. The concern is what will happen to > > any reads which is inflight that is using the data node. Will HDFS client > > know the offset to start reading from where the read failed using another > > DN? > > > > On Thu, Sep 18, 2014 at 1:57 PM, Ted Yu <yuzhih...@gmail.com> wrote: > > > > > How long would your datanode be out of service ? > > > > > > If the duration is long (say 1 day), you'd better decommission it > first. > > > > > > Otherwise, datanode restart can be done without going through > > > decommissioning. > > > > > > On Thu, Sep 18, 2014 at 8:25 AM, Biju N <bijuatapa...@gmail.com> > wrote: > > > > > > > Hello There, > > > > Can individual datanodes restarted (through service command) or > do > > > we > > > > need to add it to the exclude file in NN, restart DN it, remove it > from > > > the > > > > exclude file in NN as if the data node is being decommissioned and > put > > > > back? Any feedback on this is much appreciated. > > > > > > > > Thanks, > > > > Biju > > > > > > > > > >
