hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Arpit Agarwal (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6685) Archival Storage: Update Balancer to preserve storage type of replicas
Date Tue, 29 Jul 2014 23:08:39 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6685?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14078563#comment-14078563

Arpit Agarwal commented on HDFS-6685:

If the Balancer is an older version than the DNs it may not know of some newer StorageTypes.
I think with your changes we will just avoid considering unknown storage types in the balancing
which sounds like acceptable behavior to me.

Nitpick - comment on line 357 needs update.

+1 otherwise, the storageGroup approach is rather neat!

> Archival Storage: Update Balancer to preserve storage type of replicas
> ----------------------------------------------------------------------
>                 Key: HDFS-6685
>                 URL: https://issues.apache.org/jira/browse/HDFS-6685
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: balancer
>            Reporter: Tsz Wo Nicholas Sze
>            Assignee: Tsz Wo Nicholas Sze
>         Attachments: h6685_20140728.patch, h6685_20140729.patch
> In order to maintain storage policy requirement, Balancer always moves replicas from
a storage with any type to another storage with the same type, i.e. it preserves storage type
of replicas.  In this way, Balancer does not require to know storage policy information.

This message was sent by Atlassian JIRA

View raw message