Mailing-List: contact hdfs-issues-help@hadoop.apache.org; run by ezmlm
Precedence: bulk
Date: Mon, 20 Mar 2017 22:35:41 +0000 (UTC)
From: "Anu Engineer (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: <JIRA.13037159.1485203278000.72536.1490049341917@Atlassian.JIRA>
In-Reply-To: <JIRA.13037159.1485203278000@Atlassian.JIRA>
References: <JIRA.13037159.1485203278000@Atlassian.JIRA> <JIRA.13037159.1485203278882@jira-lw-us.apache.org>
Subject: [jira] [Commented] (HDFS-11361) Block Storage : add cache interface
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
archived-at: Mon, 20 Mar 2017 22:35:48 -0000


    [ https://issues.apache.org/jira/browse/HDFS-11361?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15933737#comment-15933737 ] 

Anu Engineer commented on HDFS-11361:
-------------------------------------

[~vagarychen] Thanks for contributing this patch. From code reading it looks quite good. But can we add some unit tests ?

> Block Storage : add cache interface
> -----------------------------------
>
>                 Key: HDFS-11361
>                 URL: https://issues.apache.org/jira/browse/HDFS-11361
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: hdfs
>            Reporter: Chen Liang
>            Assignee: Chen Liang
>         Attachments: HDFS-11361-HDFS-7240.001.patch, HDFS-11361-HDFS-7240.002.patch, HDFS-11361-HDFS-7240.003.patch
>
>
> This JIRA includes two major pieces: 1. the interface exposed to upper layer operating system that mounts the file system; and 2. the interface exposed to lower layer container storage layer.
> On one hand, to make CBlock mountable and accessible for a POSIX OS, we need to implement file system protocol. We chose to do this by running cblock with jSCSI (http://jscsi.org/) which is a java implementation of iSCSI protocol. More specifically, CBlock volume will exposed as an java-based iSCSI target, and any machine that has iSCSI installed will be able to talk to CBlock volume and mounted locally just as any disks. This is JIRA make a starting point by introducing jSCSI and implementing its {{IStorageModule}}. This will be registered to jSCSI server in future JIRA. 
> One the other hand, to be able to have the CBlock talk to container layer with better performance, CBlock should be able to cache data locally. More specifically, clients' read/write should be performed on the locally disk cache, while threads are pushing and retrieving data in backend. This JIRA takes the first step by defining interfaces for the local cache. 


--
This message was sent by Atlassian JIRA
(v6.3.15#6346)

---------------------------------------------------------------------
To unsubscribe, e-mail: hdfs-issues-unsubscribe@hadoop.apache.org
For additional commands, e-mail: hdfs-issues-help@hadoop.apache.org