[
https://issues.apache.org/jira/browse/FLINK-9352?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16493204#comment-16493204
]
ASF GitHub Bot commented on FLINK-9352:
---------------------------------------
GitHub user yanghua opened a pull request:
https://github.com/apache/flink/pull/6092
[FLINK-9352] In Standalone checkpoint recover mode many jobs with same
checkpoint interval cause IO pressure
## What is the purpose of the change
*This pull request fixed a problem : In Standalone checkpoint recover mode
many jobs with same checkpoint interval cause IO pressure*
## Brief change log
- *Replace the scheduler's initial delay time from baseInterval to a
random num between min pause and base interval*
## Verifying this change
This change is a trivial rework / code cleanup without any test coverage.
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (yes / **no**)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (yes / **no**)
- The serializers: (yes / **no** / don't know)
- The runtime per-record code paths (performance sensitive): (yes /
**no** / don't know)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Yarn/Mesos, ZooKeeper: (yes / **no** / don't know)
- The S3 file system connector: (yes / **no** / don't know)
## Documentation
- Does this pull request introduce a new feature? (yes / **no**)
- If yes, how is the feature documented? (not applicable / docs /
JavaDocs / **not documented**)
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/yanghua/flink FLINK-9352
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/6092.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #6092
----
commit 1eb432833bf2dd23187194500b6e1c6523f30605
Author: yanghua <yanghua1127@...>
Date: 2018-05-29T07:59:48Z
[FLINK-9352] In Standalone checkpoint recover mode many jobs with same
checkpoint interval cause IO pressure
----
> In Standalone checkpoint recover mode many jobs with same checkpoint interval
> cause IO pressure
> -----------------------------------------------------------------------------------------------
>
> Key: FLINK-9352
> URL: https://issues.apache.org/jira/browse/FLINK-9352
> Project: Flink
> Issue Type: Improvement
> Components: State Backends, Checkpointing
> Affects Versions: 1.5.0, 1.4.2, 1.6.0
> Reporter: vinoyang
> Assignee: vinoyang
> Priority: Major
>
> currently, the periodic checkpoint coordinator startCheckpointScheduler uses
> *baseInterval* as the initialDelay parameter. the *baseInterval* is also the
> checkpoint interval.
> In standalone checkpoint mode, many jobs config the same checkpoint interval.
> When all jobs being recovered (the cluster restart or jobmanager leadership
> switched), all jobs' checkpoint period will tend to accordance. All jobs'
> CheckpointCoordinator would start and trigger in a approximate time point.
> This caused the high IO cost in the same time period in our production
> scenario.
> I suggest let the scheduleAtFixedRate's initial delay parameter as a API
> config which can let user scatter checkpoint in this scenario.
>
> cc [~StephanEwen] [~Zentol]
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
