[
https://issues.apache.org/jira/browse/APEXMALHAR-2223?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Chandni Singh reassigned APEXMALHAR-2223:
-----------------------------------------
Assignee: Chandni Singh
> Managed state should parallelize WAL writes
> -------------------------------------------
>
> Key: APEXMALHAR-2223
> URL: https://issues.apache.org/jira/browse/APEXMALHAR-2223
> Project: Apache Apex Malhar
> Issue Type: Improvement
> Affects Versions: 3.4.0
> Reporter: Thomas Weise
> Assignee: Chandni Singh
>
> Currently, data is accumulated in memory and written to the WAL on checkpoint
> only. This causes a write spike on checkpoint and does not utilize the HDFS
> write pipeline. The other extreme is writing to the WAL as soon as data
> arrives and then only flush in beforeCheckpoint. The downside of this is that
> when the same key is written many times, all duplicates will be in the WAL.
> Need to find a balances approach, that the user can potentially fine tune.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
