GitHub user dding3 opened a pull request:
https://github.com/apache/spark/pull/15125
[SPARK-5484][GraphX] Periodically do checkpoint in Pregel
## What changes were proposed in this pull request?
Pregel-based iterative algorithms with more than ~50 iterations begin to
slow down and eventually fail with a StackOverflowError due to Spark's lack of
support for long lineage chains.
This PR causes Pregel to checkpoint the graph periodically if the
checkpoint directory is set.
This PR moves PeriodicGraphCheckpointer.scala from mllib to graphx, moves
PeriodicRDDCheckpointer.scala, PeriodicCheckpointer.scala from mllib to core
## How was this patch tested?
unit tests, manual tests
(Please explain how this patch was tested. E.g. unit tests, integration
tests, manual tests)
(If this patch involves UI changes, please attach a screenshot; otherwise,
remove this)
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/dding3/spark cp2_pregel
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/15125.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 #15125
----
commit 3268ca2144519a1d84484c116e16e6064553a6c1
Author: ding <[email protected]>
Date: 2016-09-16T17:51:58Z
test
commit ffeadbe96b7fdb491962e065f97ece09fd1a1282
Author: ding <[email protected]>
Date: 2016-09-16T18:13:22Z
period do checkpoint in pregel
commit 720a741db037a94ab86750fb3c9d5a54732da5e1
Author: ding <[email protected]>
Date: 2016-09-16T18:37:50Z
remove unused code
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