[
https://issues.apache.org/jira/browse/BEAM-5775?focusedWorklogId=226507&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-226507
]
ASF GitHub Bot logged work on BEAM-5775:
----------------------------------------
Author: ASF GitHub Bot
Created on: 12/Apr/19 07:19
Start Date: 12/Apr/19 07:19
Worklog Time Spent: 10m
Work Description: iemejia commented on issue #6714: [BEAM-5775] Spark:
implement a custom class to lazily encode values for persistence.
URL: https://github.com/apache/beam/pull/6714#issuecomment-482466587
Run Java PreCommit
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
Issue Time Tracking
-------------------
Worklog Id: (was: 226507)
Time Spent: 8h 20m (was: 8h 10m)
> Make the spark runner not serialize data unless spark is spilling to disk
> -------------------------------------------------------------------------
>
> Key: BEAM-5775
> URL: https://issues.apache.org/jira/browse/BEAM-5775
> Project: Beam
> Issue Type: Improvement
> Components: runner-spark
> Reporter: Mike Kaplinskiy
> Assignee: Mike Kaplinskiy
> Priority: Minor
> Labels: triaged
> Time Spent: 8h 20m
> Remaining Estimate: 0h
>
> Currently for storage level MEMORY_ONLY, Beam does not coder-ify the data.
> This lets Spark keep the data in memory avoiding the serialization round
> trip. Unfortunately the logic is fairly coarse - as soon as you switch to
> MEMORY_AND_DISK, Beam coder-ifys the data even though Spark might have chosen
> to keep the data in memory, incurring the serialization overhead.
>
> Ideally Beam would serialize the data lazily - as Spark chooses to spill to
> disk. This would be a change in behavior when using beam, but luckily Spark
> has a solution for folks that want data serialized in memory -
> MEMORY_AND_DISK_SER will keep the data serialized.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
