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From Bill Au <bill.w...@gmail.com>
Subject Re: adding replication status to dfshealth.jsp
Date Wed, 11 Feb 2009 21:13:30 GMT
Got it.  Thanks.

Bill

On Wed, Feb 11, 2009 at 1:16 PM, Hairong Kuang <hairong@yahoo-inc.com>wrote:

> It's available in 0.18. Remember that the file is saved at NameNode side.
> It
> took me a while for me to figure out where the file was the first time I
> used this tool.
>
> Hairong
>
>
> On 2/11/09 9:18 AM, "Bill Au" <bill.w.au@gmail.com> wrote:
>
> > 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 <rangadi@yahoo-inc.com>
> 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
> >>>
> >>>
> >>
>
>

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