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Date: Mon, 26 Jan 2015 19:36:27 +0000 (UTC)
From: Ravi Prakash <ravihoo@ymail.com>
Reply-To: Ravi Prakash <ravihoo@ymail.com>
To: "user@hadoop.apache.org" <user@hadoop.apache.org>
Message-ID: <643101745.743165.1422300988011.JavaMail.yahoo@mail.yahoo.com>
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Subject: Re: NN config questions
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Hi Dave!
Here the class which is used to store all the edits : https://github.com/ap=
ache/hadoop/blob/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/ap=
ache/hadoop/hdfs/server/namenode/FSEditLog.java#L575
HTHRavi
=20

     On Monday, January 26, 2015 10:32 AM, "dlmarion@comcast.net" <dlmarion=
@comcast.net> wrote:
  =20

=20
=C2=A0If multiple directories are specified for dfs.namenode.name.dir and d=
fs.namenode.edits.dir, are the writes to the different directories done in =
parallel or serial?

=C2=A0Does dfs.namenode.shared.edits.dir support multiple directories like =
the properties above?

Thanks,
Dave


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<html><body><div style=3D"color:#000; background-color:#fff; font-family:He=
lveticaNeue-Light, Helvetica Neue Light, Helvetica Neue, Helvetica, Arial, =
Lucida Grande, sans-serif;font-size:16px"><div id=3D"yui_3_16_0_1_142229806=
3343_55152">Hi Dave!</div><div id=3D"yui_3_16_0_1_1422298063343_55153"><br>=
</div><div id=3D"yui_3_16_0_1_1422298063343_55134" dir=3D"ltr">Here the cla=
ss which is used to store all the edits : <a id=3D"yui_3_16_0_1_14222980633=
43_55133" href=3D"https://github.com/apache/hadoop/blob/trunk/hadoop-hdfs-p=
roject/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSE=
ditLog.java#L575">https://github.com/apache/hadoop/blob/trunk/hadoop-hdfs-p=
roject/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSE=
ditLog.java#L575</a></div><div id=3D"yui_3_16_0_1_1422298063343_55154" dir=
=3D"ltr"><br></div><div id=3D"yui_3_16_0_1_1422298063343_55155" dir=3D"ltr"=
>HTH</div><div id=3D"yui_3_16_0_1_1422298063343_55313" dir=3D"ltr">Ravi<br>=
</div><div id=3D"yui_3_16_0_1_1422298063343_55314"><span></span></div> <div=
 class=3D"qtdSeparateBR"><br><br></div><div style=3D"display: block;" class=
=3D"yahoo_quoted"> <div style=3D"font-family: HelveticaNeue-Light, Helvetic=
a Neue Light, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; =
font-size: 16px;"> <div style=3D"font-family: HelveticaNeue, Helvetica Neue=
, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir=
=3D"ltr"> <font face=3D"Arial" size=3D"2"> On Monday, January 26, 2015 10:3=
2 AM, "dlmarion@comcast.net" &lt;dlmarion@comcast.net&gt; wrote:<br> </font=
> </div>  <br><br> <div class=3D"y_msg_container"><div id=3D"yiv3901269589"=
><div><div style=3D"font-family:Arial;font-size:12pt;color:#000000;"><div><=
br></div><div>&nbsp;If multiple directories are specified for dfs.namenode.=
name.dir and dfs.namenode.edits.dir, are the writes to the different direct=
ories done in parallel or serial?<br></div><div><br></div><div>&nbsp;Does <=
a href=3D"" rel=3D"nofollow" class=3D"yiv3901269589mceItemAnchor" name=3D"d=
fs.namenode.shared.edits.dir"></a>dfs.namenode.shared.edits.dir support mul=
tiple directories like the properties above?<br></div><div><br></div><div>T=
hanks,<br></div><div>Dave<br></div></div></div></div><br><br></div>  </div>=
 </div>  </div> </div></body></html>
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