On hdfs see
http://wiki.apache.org/hadoop/FAQ#15
In addition to the James's suggestion you can also specify dfs.name.dir
for the name-node to store extra copies of the namespace.
James Moore wrote:
On Tue, Jul 29, 2008 at 6:37 PM, Rafael Turk <[EMAIL PROTECTED]> wrote:
Hi All,
I´m setting up a cluster with 4 disks per server. Is there any way to make
Hadoop aware of this setup and take benefits from that?
I believe all you need to do is give four directories (one on each
drive) as the value for dfs.data.dir and mapred.local.dir. Something
like:
<property>
<name>dfs.data.dir</name>
<value>/drive1/myDfsDir,/drive2/myDfsDir,/drive3/myDfsDir,/drive4/myDfsDir</value>
<description>Determines where on the local filesystem an DFS data node
should store its blocks. If this is a comma-delimited
list of directories, then data will be stored in all named
directories, typically on different devices.
Directories that do not exist are ignored.
</description>
</property>
