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From "Dmitriy Pavlov (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (IGNITE-5558) Add ability to read WAL outside of an Ignite node
Date Mon, 26 Jun 2017 15:50:00 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-5558?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16063282#comment-16063282

Dmitriy Pavlov edited comment on IGNITE-5558 at 6/26/17 3:49 PM:


was (Author: dpavlov):

> Add ability to read WAL outside of an Ignite node
> -------------------------------------------------
>                 Key: IGNITE-5558
>                 URL: https://issues.apache.org/jira/browse/IGNITE-5558
>             Project: Ignite
>          Issue Type: Improvement
>          Components: cache
>    Affects Versions: 2.1
>            Reporter: Alexey Goncharuk
>            Assignee: Dmitriy Pavlov
>             Fix For: 2.1
> Currently, the WAL iterator can be obtained from the WAL manager when an Ignite node
is up and running.
> However, it may be extremely useful to read WAL in an 'offline' mode, when a node is
not started up. This may be required for crash analysis or to export committed data to some
external systems.
> In the future we can make this even a public interface, however as a starting point,
I would like to keep it in private package because moving to the public package will require
Iterator and records to be public too.
> So, as a starting point, we need:
>  * An object that will allow us to get WALIterator instances (probably, should be closeable)
>  * A method on this object which will create an iterator by a file name or file names
> Using this object should not require an active Ignite instance running.

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