Guoqiang Li created SPARK-3623:
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Summary: GraphX does not support the checkpoint operation
Key: SPARK-3623
URL: https://issues.apache.org/jira/browse/SPARK-3623
Project: Spark
Issue Type: Improvement
Components: GraphX
Affects Versions: 1.1.0, 1.0.2
Reporter: Guoqiang Li
Priority: Critical
Consider the following code:
{code}
for (i <- 0 until totalIter) {
val previousCorpus = corpus
logInfo("Start Gibbs sampling (Iteration %d/%d)".format(i, totalIter))
val corpusTopicDist = collectTermTopicDist(corpus, globalTopicCounter,
sumTerms,
numTerms, numTopics, alpha, beta).persist(storageLevel)
val corpusSampleTopics = sampleTopics(corpusTopicDist,
globalTopicCounter, sumTerms, numTerms,
numTopics, alpha, beta).persist(storageLevel)
corpus = updateCounter(corpusSampleTopics,
numTopics).persist(storageLevel)
globalTopicCounter = collectGlobalCounter(corpus, numTopics)
assert(bsum(globalTopicCounter) == sumTerms)
previousCorpus.unpersistVertices()
corpusTopicDist.unpersistVertices()
corpusSampleTopics.unpersistVertices()
}
{code}
If there is no checkpoint operation will appear the following problems.
1. The RDD of corpus dependencies are too deep
2. The shuffle files are too large.
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