[
https://issues.apache.org/jira/browse/HDFS-9005?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14737842#comment-14737842
]
Ming Ma commented on HDFS-9005:
-------------------------------
Currently it caches the data. It doesn't poll the script periodically. It works
for our environment as the upgrade domains of a given node doesn't change. If
the physical machine is moved around; it will have a new host name and upgrade
domain. But I agree that if we need to dynamic update of upgrade domain or
network location for a given node, we need manual or automatic refresh
regardless if we use script or XML.
> Provide support for upgrade domain script
> -----------------------------------------
>
> Key: HDFS-9005
> URL: https://issues.apache.org/jira/browse/HDFS-9005
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Ming Ma
>
> As part of the upgrade domain feature, we need to provide a mechanism to
> specify upgrade domain for each datanode. One way to accomplish that is to
> allow admins specify an upgrade domain script that takes DN ip or hostname as
> input and return the upgrade domain. Then namenode will use it at run time to
> set {{DatanodeInfo}}'s upgrade domain string. The configuration can be
> something like:
> {noformat}
> <property>
> <name>dfs.namenode.upgrade.domain.script.file.name</name>
> <value>/etc/hadoop/conf/upgrade-domain.sh</value>
> </property>
> {noformat}
> just like topology script,
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
