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From "Chandni Singh (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (APEXMALHAR-2031) Allow Window Data Manager to store data in a user specified directory
Date Sun, 27 Mar 2016 03:58:25 GMT

    [ https://issues.apache.org/jira/browse/APEXMALHAR-2031?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15213320#comment-15213320

Chandni Singh commented on APEXMALHAR-2031:

In Managed State this can be useful as follows:

Each Bucket contains a Meta file. This meta file contains certain information about each TimeBucket-
one such item is the last transferred window id.
So let's say  Bucket 1-> TimeBucket1 has last transferred window id as 10. Now if during
transfer of window id 10 there was a failure and then the  application was re-started (cold).

If the window files are outside the older app's path, the new application can see that window
10 was not deleted but Bucket1->TimeBucket 1 has window 10 as last transferred window id.
With this information it is certain that there was a failure during transfer of this file
and its data should be transferred to the bucket data.
This will be a slight improvement.

> Allow Window Data Manager to store data in a user specified directory
> ---------------------------------------------------------------------
>                 Key: APEXMALHAR-2031
>                 URL: https://issues.apache.org/jira/browse/APEXMALHAR-2031
>             Project: Apache Apex Malhar
>          Issue Type: Improvement
>            Reporter: Timothy Farkas
>            Assignee: Chandni Singh
> The Window Data Manager stores data in the application path, but some uses require the
data to be stored in a user definable absolute path so that the data can be reused across
different application launches.
> This update is required for one of our users.

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