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https://issues.apache.org/jira/browse/SAMZA-41?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14598581#comment-14598581
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Monal Daxini commented on SAMZA-41:
-----------------------------------
Patch is ready.
I have updated the design docs.
As per my conversation with Yi Pan, I have attached the patch for SAMZA-41
built and tested against 0.9.1 branch, along with updated docs and unit tests.
The changes are pretty non-intrusive, and I am hoping this makes it into the
0.9.1 release.
Here is the review board link ([~nickpan47] I have added you as a reviewer.
Please feel free to add others):
https://reviews.apache.org/r/35809/
Link to the pull request:
https://github.com/apache/samza/pull/4
I can send a separate pull request for master later on.
> Support static partition assignment in LocalJobFactory
> ------------------------------------------------------
>
> Key: SAMZA-41
> URL: https://issues.apache.org/jira/browse/SAMZA-41
> Project: Samza
> Issue Type: Bug
> Components: container
> Affects Versions: 0.6.0
> Reporter: Chris Riccomini
> Labels: project
> Attachments: samza-41-design-doc.md, samza-41-design-doc.pdf
>
>
> LocalJobFactory currently creates a single container (either in ProcessJob or
> ThreadJob) and assigns all partitions to it using:
> {code}
> val partitions = Util.getMaxInputStreamPartitions(config)
> {code}
> This works in the case where you only wish to run a single container that
> processes all messages. There are situations where one container is not
> enough, though. If you aren't using YARN, we don't provide an easy way to run
> multiple containers that split partitions between them. This support would be
> useful for running containers in EC2, for example, where you'd wish to run
> two EC2 instances (for example) that host Samza containers that share
> partitions for a single job.
> Some potential solutions:
> 1. Let developers statically assign partitions in config file.
> 2. Let developers define a container ID and container count, and let
> LocalJobFactory/ProcessJob/ThreadJob figure out which partitions the
> container should own. For example, a container with id 0 and container count
> 2 would own partitions 0, 2, 4, 6, 8, etc.
> 3. Write a different JobFactory for this case (e.g. EC2JobFactory)
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