[
https://issues.apache.org/jira/browse/HDFS-16429?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Mingxiang Li updated HDFS-16429:
--------------------------------
Parent: HDFS-15382
Issue Type: Sub-task (was: Improvement)
> Add DataSetLockManager to maintain locks for FsDataSetImpl
> ----------------------------------------------------------
>
> Key: HDFS-16429
> URL: https://issues.apache.org/jira/browse/HDFS-16429
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: hdfs
> Affects Versions: 3.2.0
> Reporter: Mingxiang Li
> Assignee: Mingxiang Li
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.2.0
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> 1、Use lockManager to maintain two level lock for FsDataSetImpl.
> The simple lock model like this.Parts of implemented as follows
> * As for finalizeReplica(),append(),createRbw()....First get BlockPoolLock
> read lock，and then get BlockPoolLock-volume-lock write lock.
> * As for getStoredBlock(),getMetaDataInputStream()....First get
> BlockPoolLock read lock，and the then get BlockPoolLock-volume-lock read lock.
> * As for deepCopyReplica(),getBlockReports() get the BlockPoolLock read lock.
> * As for delete hold the BlockPoolLock write lock.
> 2、Make LightWeightResizableGSet become thread safe.It not become performance
> bottleneck if we make it thread safe.We can reduce lock grain size for
> ReplicaMap when make LightWeightResizableGSet thread safe.
--
This message was sent by Atlassian Jira
(v8.20.1#820001)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
