[jira] [Comment Edited] (IGNITE-5558) Add ability to read WAL outside of an Ignite node

["Ilya Lantukh (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IGNITE-5558?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16055637#comment-16055637 ] 

Ilya Lantukh edited comment on IGNITE-5558 at 6/20/17 12:04 PM:
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I think that many of our WAL record types don't make sense outside of scope of ignite node {{(BTREE_*, META_PAGE_UPDATE_*)}}. Should we consider adding ability to filter out certain record types from such public iterator?


was (Author: ilantukh):
I think that many of our WAL record types don't make sense outside of scope of ignite node (BTREE_*, META_PAGE_UPDATE_*). Should we consider adding ability to filter out certain record types from such public iterator?

> 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
>             Fix For: 2.2
>
>
> 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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