Thanks for the info. What version(s) is "-metaSave" available for? I am running 0.18.2 and it doesn't work there.
Bill On Tue, Feb 10, 2009 at 9:04 PM, Raghu Angadi <[email protected]> wrote: > > one more thing I forgot : > > Another useful tool is 'bin/hadoop dfsadmin -metaSave' > > This lists all the blocks that are under replicated. This is not very > official and not used much. It needs to be more user friendly (currently it > writes to a file on the NameNode)... I might improve (and/or rename) it as a > follow up to HADOOP-4103. > > Stats like dfs.FSNamesystem.UnderReplicatedBlocks that Brain mentioned are > useful to find if there is some problem. And the commands like the one above > help in finding which specific blocks are in these states. > > Raghu. > > > > Bill Au wrote: > >> I am in the process of setting up remote monitoring of my Hadoop cluster. >> I >> seems to me that the replication status can only be obtained from the >> command line by the fsck command. Has anyone though about adding >> replication status to the NameNode web UI in dfshealth.jsp? Or is that >> something that I really shouldn't worry about since Hadoop will fix things >> all by itself? >> >> Bill >> >> >
