[
https://issues.apache.org/jira/browse/HDFS-15087?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17253850#comment-17253850
]
GANG LIAO commented on HDFS-15087:
----------------------------------
I think this is an interesting idea. In your introduction, the 5th step updates
the mount table on Routers after the previous steps complete.
I have a few questions:
# Are you directly updating the status of Zookeeper (state store)? Or update
the cached mount table of each router? Or both?
# Is this update synchronized? In other words, the state store and all routers
must be updated with the latest mount table entries in order to release the
lock, right?
> RBF: Balance/Rename across federation namespaces
> ------------------------------------------------
>
> Key: HDFS-15087
> URL: https://issues.apache.org/jira/browse/HDFS-15087
> Project: Hadoop HDFS
> Issue Type: New Feature
> Reporter: Jinglun
> Assignee: Jinglun
> Priority: Major
> Attachments: HDFS-15087.initial.patch, HFR_Rename Across Federation
> Namespaces.pdf
>
>
> The Xiaomi storage team has developed a new feature called HFR(HDFS
> Federation Rename) that enables us to do balance/rename across federation
> namespaces. The idea is to first move the meta to the dst NameNode and then
> link all the replicas. It has been working in our largest production cluster
> for 2 months. We use it to balance the namespaces. It turns out HFR is fast
> and flexible. The detail could be found in the design doc.
> Looking forward to a lively discussion.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
