hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-744) Support hsync in HDFS
Date Thu, 10 May 2012 23:24:01 GMT

     [ https://issues.apache.org/jira/browse/HDFS-744?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Lars Hofhansl updated HDFS-744:

    Attachment: HDFS-744-trunk-v2.patch

Patch that I tested against HBase.
(I post the required HBase changes on the linked jira.)

HBase starts up, I can flush, and compact tables.
I verified via debugger that the sync path is correctly triggered.

*Please* have a look. For users like us (Salesforce.com) this is an important data safety

> Support hsync in HDFS
> ---------------------
>                 Key: HDFS-744
>                 URL: https://issues.apache.org/jira/browse/HDFS-744
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>            Reporter: Hairong Kuang
>         Attachments: HDFS-744-trunk-v2.patch, HDFS-744-trunk.patch, hdfs-744-v2.txt,
hdfs-744-v3.txt, hdfs-744.txt
> HDFS-731 implements hsync by default as hflush. As descriibed in HADOOP-6313, the real
expected semantics should be "flushes out to all replicas and all replicas have done posix
fsync equivalent - ie the OS has flushed it to the disk device (but the disk may have it in
its cache)." This jira aims to implement the expected behaviour.

This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira


View raw message