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 > > > > > >
