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From: Vishnu Viswanath <vishnu.viswanath25@gmail.com>
Date: Sat, 28 Dec 2013 08:40:49 +0530
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 <CAK2z7j7VUUgvLcRu1PL=p+Ar_FS+1502GrrtZz-7cGQBLb6O8A@mail.gmail.com>
Subject: Re: block replication
To: "user@hadoop.apache.org" <user@hadoop.apache.org>, chris@embree.us
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well i couldn't find any property in
http://hadoop.apache.org/docs/r1.2.1/hdfs-default.html that sets the time
interval time consider a node as dead.

I saw there is a property dfs.namenode.heartbeat.recheck-interval or
heartbeat.recheck.interval, but i couldn't find it there. is it removed?
or am i looking at wrong place?


On Sat, Dec 28, 2013 at 7:36 AM, Chris Embree <cembree@gmail.com> wrote:

> Maybe I'm just grouchy tonight.. it's seems all of these questions can be
> answered by RTFM.
> http://hadoop.apache.org/docs/current2/hadoop-project-dist/hadoop-hdfs/HdfsUserGuide.html
>
> What's the balance between encouraging learning by New to Hadoop users and
> OMG!?
>
>
> On Fri, Dec 27, 2013 at 8:58 PM, Vishnu Viswanath <
> vishnu.viswanath25@gmail.com> wrote:
>
>> Hi all,
>>
>> Can someone tell me these:
>>
>> 1) which property in hadoop conf sets the time limit to consider a node
>> as dead?
>> 2) after detecting a node as dead, after how much time does hadoop
>> replicates the block to another node?
>> 3) if the dead node comes alive again, in how much time does hadoop
>> identifies a block as over-replicated and when does it deletes that block?
>>
>> Regards,
>>
>
>

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<div dir=3D"ltr">well i couldn&#39;t find any property in=A0<a href=3D"http=
://hadoop.apache.org/docs/r1.2.1/hdfs-default.html">http://hadoop.apache.or=
g/docs/r1.2.1/hdfs-default.html</a>=A0that sets the time interval time cons=
ider a node as dead.=A0<div>

<br><div>I saw there is a property=A0dfs.namenode.heartbeat.recheck-interva=
l or heartbeat.recheck.interval, but i couldn&#39;t find it there. is it re=
moved?</div><div>or am i looking at wrong place?</div></div></div><div clas=
s=3D"gmail_extra">

<br><br><div class=3D"gmail_quote">On Sat, Dec 28, 2013 at 7:36 AM, Chris E=
mbree <span dir=3D"ltr">&lt;<a href=3D"mailto:cembree@gmail.com" target=3D"=
_blank">cembree@gmail.com</a>&gt;</span> wrote:<br><blockquote class=3D"gma=
il_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-lef=
t:1ex">

<div dir=3D"ltr">Maybe I&#39;m just grouchy tonight.. it&#39;s seems all of=
 these questions can be answered by RTFM. =A0<a href=3D"http://hadoop.apach=
e.org/docs/current2/hadoop-project-dist/hadoop-hdfs/HdfsUserGuide.html" tar=
get=3D"_blank">http://hadoop.apache.org/docs/current2/hadoop-project-dist/h=
adoop-hdfs/HdfsUserGuide.html</a><div>


<br></div><div>What&#39;s the balance between encouraging learning by New t=
o Hadoop users and OMG!? =A0</div></div><div class=3D"HOEnZb"><div class=3D=
"h5"><div class=3D"gmail_extra"><br><br><div class=3D"gmail_quote">On Fri, =
Dec 27, 2013 at 8:58 PM, Vishnu Viswanath <span dir=3D"ltr">&lt;<a href=3D"=
mailto:vishnu.viswanath25@gmail.com" target=3D"_blank">vishnu.viswanath25@g=
mail.com</a>&gt;</span> wrote:<br>


<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><div dir=3D"ltr">Hi all,<div><br></div><div>=
Can someone tell me these:</div><div><br></div><div><div>1) which property =
in hadoop conf sets the time limit to consider a node as dead?</div>


<div>2) after detecting a node as dead, after how much time does hadoop rep=
licates the block to another node?</div>

<div>3) if the dead node comes alive again, in how much time does hadoop id=
entifies a block as over-replicated and when does it deletes that block?</d=
iv></div><div><br></div><div>Regards,</div></div>
</blockquote></div><br></div>
</div></div></blockquote></div><br></div>

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