Mailing-List: contact hdfs-issues-help@hadoop.apache.org; run by ezmlm
Precedence: bulk
Reply-To: hdfs-issues@hadoop.apache.org
Message-ID: <26043180.220281292872024280.JavaMail.jira@thor>
Date: Mon, 20 Dec 2010 14:07:04 -0500 (EST)
From: "Konstantin Shvachko (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Subject: [jira] Commented: (HDFS-1489) breaking the dependency between
 FSEditLog and FSImage
In-Reply-To: <26973763.39371288981848238.JavaMail.jira@thor>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit


    [ https://issues.apache.org/jira/browse/HDFS-1489?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12973303#action_12973303 ] 

Konstantin Shvachko commented on HDFS-1489:
-------------------------------------------

Ivan, would also consider making the patch against trunk rather than 0.22.

> breaking the dependency between FSEditLog and FSImage
> -----------------------------------------------------
>
>                 Key: HDFS-1489
>                 URL: https://issues.apache.org/jira/browse/HDFS-1489
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: name-node
>    Affects Versions: 0.21.0
>            Reporter: Diego Marron
>         Attachments: HDFS-1489.diff, HDFS-1489.diff, HDFS-1489.pdf
>
>
> This is a refactor patch which its main concerns are:
> - breaking the dependency between FSEditLog and FSImage
> - Splitting the abstracting the error handling and directory management, 
> - Decoupling Storage from FSImage.
> In order to accomplish the above goal, we will need to introduce new classes:
> -  NNStorage: Will care about the storage. It extends Storage class, and will contain the StorageDirectories.
> -  NNUtils: Some utility static methods on FSImage and FSEditLog will be moved here.
> -  PersistenceManager: FSNameSystem will now be responsible for managing the FSImage & FSEditLog objects. There will be some logic that will have to moved out of FSImage to facilite this. For this we propose a PersistanceManager? object as follows.
> For more deep details, see the design document uploaded.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.