Github user liyezhang556520 commented on the pull request:
https://github.com/apache/spark/pull/2134#issuecomment-67598353
Hi @andrewor14 ,
[PR#3629](https://github.com/apache/spark/pull/3629) solved the problem
that I pointed out in your original patch
[PR#1165](https://github.com/apache/spark/pull/1165), you can check the comment
history on Aug 12th.
This PR mainly not focus on this bug, but resolved this bug meanwhile.
This PR mainly focus on the disk IO issue, which is memory dropping
problem. There is only one thread dropping memory when cached RDD memory need
to evict to disk. This problem also pointed out in
[PR#791](https://github.com/apache/spark/pull/791). The main difference between
this PR and [PR#791](https://github.com/apache/spark/pull/791) is that this PR
also make the `tryToPut` process in parallel. And the memory maintain will be
more complex. Also this PR make some change with testSuite file.
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