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Posted to hdfs-user@hadoop.apache.org by dl...@comcast.net on 2015/01/26 19:30:30 UTC
NN config questions
If multiple directories are specified for dfs.namenode.name.dir and dfs.namenode.edits.dir, are the writes to the different directories done in parallel or serial?
Does dfs.namenode.shared.edits.dir support multiple directories like the properties above?
Thanks,
Dave
Re: NN config questions
Posted by Ravi Prakash <ra...@ymail.com>.
Hi Dave!
Here the class which is used to store all the edits : https://github.com/apache/hadoop/blob/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSEditLog.java#L575
HTHRavi
On Monday, January 26, 2015 10:32 AM, "dlmarion@comcast.net" <dl...@comcast.net> wrote:
If multiple directories are specified for dfs.namenode.name.dir and dfs.namenode.edits.dir, are the writes to the different directories done in parallel or serial?
Does dfs.namenode.shared.edits.dir support multiple directories like the properties above?
Thanks,
Dave
Re: NN config questions
Posted by Ravi Prakash <ra...@ymail.com>.
Hi Dave!
Here the class which is used to store all the edits : https://github.com/apache/hadoop/blob/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSEditLog.java#L575
HTHRavi
On Monday, January 26, 2015 10:32 AM, "dlmarion@comcast.net" <dl...@comcast.net> wrote:
If multiple directories are specified for dfs.namenode.name.dir and dfs.namenode.edits.dir, are the writes to the different directories done in parallel or serial?
Does dfs.namenode.shared.edits.dir support multiple directories like the properties above?
Thanks,
Dave
Re: NN config questions
Posted by Ravi Prakash <ra...@ymail.com>.
Hi Dave!
Here the class which is used to store all the edits : https://github.com/apache/hadoop/blob/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSEditLog.java#L575
HTHRavi
On Monday, January 26, 2015 10:32 AM, "dlmarion@comcast.net" <dl...@comcast.net> wrote:
If multiple directories are specified for dfs.namenode.name.dir and dfs.namenode.edits.dir, are the writes to the different directories done in parallel or serial?
Does dfs.namenode.shared.edits.dir support multiple directories like the properties above?
Thanks,
Dave
Re: NN config questions
Posted by Ravi Prakash <ra...@ymail.com>.
Hi Dave!
Here the class which is used to store all the edits : https://github.com/apache/hadoop/blob/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSEditLog.java#L575
HTHRavi
On Monday, January 26, 2015 10:32 AM, "dlmarion@comcast.net" <dl...@comcast.net> wrote:
If multiple directories are specified for dfs.namenode.name.dir and dfs.namenode.edits.dir, are the writes to the different directories done in parallel or serial?
Does dfs.namenode.shared.edits.dir support multiple directories like the properties above?
Thanks,
Dave