FAQ
DN should transmit absolute failed volume count rather than increments to the NN
--------------------------------------------------------------------------------

Key: HDFS-1850
URL: https://issues.apache.org/jira/browse/HDFS-1850
Project: Hadoop HDFS
Issue Type: Bug
Components: data-node, name-node
Reporter: Eli Collins
Assignee: Eli Collins
Fix For: 0.23.0


The API added in HDFS-811 for the DN to report volume failures to the NN is "inc(DN)". However the given sequence of events will result in the NN forgetting about reported failed volumes:

# DN loses a volume and reports it
# NN restarts
# DN re-registers to the new NN

A more robust interface would be to have the DN report the total number of volume failures to the NN each heart beat (the same way other volume state is transmitted).

This will likely be an incompatible change since it requires changing the Datanode protocol.

--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira

Search Discussions

Related Discussions

Discussion Navigation
viewthread | post
Discussion Overview
grouphdfs-dev @
categorieshadoop
postedApr 20, '11 at 1:39a
activeApr 20, '11 at 1:39a
posts1
users1
websitehadoop.apache.org...
irc#hadoop

1 user in discussion

Eli Collins (JIRA): 1 post

People

Translate

site design / logo © 2022 Grokbase