hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Hairong Kuang (JIRA)" <j...@apache.org>
Subject [jira] Created: (HDFS-1436) LeaseRenew RPC does not need to grab fsnamesystem write lock
Date Fri, 01 Oct 2010 00:05:33 GMT
LeaseRenew RPC does not need to grab fsnamesystem write lock
------------------------------------------------------------

                 Key: HDFS-1436
                 URL: https://issues.apache.org/jira/browse/HDFS-1436
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: name-node
    Affects Versions: 0.22.0
            Reporter: Hairong Kuang
            Assignee: Hairong Kuang
             Fix For: 0.22.0


Lease renew RPC changes neither fsdirectory nor blocksMap. It only updates lease related data
structure. Since all accesses of lease related data structures are already synced on leaseManager
lock, I do not think the lease renew RPC needs to grab the fsnamesystem write lock. This will
greatly reduce the pressure on NameNode when there are large number of files are open for
writing in an HDFS cluster.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message