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Posted to hdfs-issues@hadoop.apache.org by "Zhe Zhang (JIRA)" <ji...@apache.org> on 2015/03/31 19:49:54 UTC

[jira] [Updated] (HDFS-7653) Block Readers and Writers used in both client side and datanode side

     [ https://issues.apache.org/jira/browse/HDFS-7653?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Zhe Zhang updated HDFS-7653:
----------------------------
    Parent Issue: HDFS-8031  (was: HDFS-7285)

> Block Readers and Writers used in both client side and datanode side
> --------------------------------------------------------------------
>
>                 Key: HDFS-7653
>                 URL: https://issues.apache.org/jira/browse/HDFS-7653
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Li Bo
>            Assignee: Li Bo
>         Attachments: BlockReadersWriters.patch
>
>
> There're a lot of block read/write operations in HDFS-EC, for example, when client writes a file in striping layout, client has to write several blocks to several different datanodes; if a datanode wants to do an encoding/decoding task, it has to read several blocks from itself and other datanodes, and writes one or more blocks to itself or other datanodes.  



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