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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-2802) Support for RW/RO snapshots in HDFS
Date Fri, 19 Oct 2012 00:32:03 GMT

     [ https://issues.apache.org/jira/browse/HDFS-2802?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tsz Wo (Nicholas), SZE updated HDFS-2802:
-----------------------------------------

    Attachment: Snapshots20121018.pdf

>From the last time the patch is posted for the prototype, I have been continuing work
on the code. The attachment (Snapshots20121018.pdf) is the updated design document based on
currently where the implementation is. It is still fairly highlevel, but should has enough
details to give an idea on how the snapshot feature is being implemented. I will continue
to update the design as the implementation progresses.

Here are some of the next steps:
# Split the large patch and create subtasks in this jira, to make it easy to understand the
implementation.
# Will schedule a design review meeting to go over the requirements and design in detail with
the folks who are interested. Especially to get feedback from other Hadoop projects. This
meeting will be in the week of Oct 29, post Hadoop World.
                
> Support for RW/RO snapshots in HDFS
> -----------------------------------
>
>                 Key: HDFS-2802
>                 URL: https://issues.apache.org/jira/browse/HDFS-2802
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: data-node, name-node
>            Reporter: Hari Mankude
>            Assignee: Hari Mankude
>         Attachments: snap.patch, snapshot-one-pager.pdf, Snapshots20121018.pdf
>
>
> Snapshots are point in time images of parts of the filesystem or the entire filesystem.
Snapshots can be a read-only or a read-write point in time copy of the filesystem. There are
several use cases for snapshots in HDFS. I will post a detailed write-up soon with with more
information.

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