[ https://issues.apache.org/jira/browse/HDFS-15255?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Lisheng Sun updated HDFS-15255: ------------------------------- Description: When only one replica of a block is SDD, the others are HDD. When the client reads the data, the current logic is that it considers the distance between the client and the dn. I think it should also consider the StorageType of the replica. Priority to return a replica of the fastest feed StorageType when the distance is same. was: When only one replica of a block is SDD, the others are HDD. When the client reads the data, the current logic is that it considers the distance between the client and the dn. I think it should also consider the StorageType of the replica. Priority to return a replica of the fastest feed StorageType > Consider StorageType when DatanodeManager#sortLocatedBlock() > ------------------------------------------------------------ > > Key: HDFS-15255 > URL: https://issues.apache.org/jira/browse/HDFS-15255 > Project: Hadoop HDFS > Issue Type: Improvement > Reporter: Lisheng Sun > Assignee: Lisheng Sun > Priority: Major > Attachments: HDFS-15255.001.patch, HDFS-15255.002.patch, > HDFS-15255.003.patch, HDFS-15255.004.patch > > > When only one replica of a block is SDD, the others are HDD. > When the client reads the data, the current logic is that it considers the > distance between the client and the dn. I think it should also consider the > StorageType of the replica. Priority to return a replica of the fastest feed > StorageType when the distance is same. -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org