Yes, it's normal when memory is not enough to put the third partition, as you 
can see in your attached picture.

Thanks
Jerry

From: Haopu Wang [mailto:hw...@qilinsoft.com]
Sent: Tuesday, July 22, 2014 3:09 PM
To: user@spark.apache.org
Subject: number of "Cached Partitions" v.s. "Total Partitions"


Hi, I'm using local mode and read a text file as RDD using 
JavaSparkContext.textFile() API.

And then call "cache()" method on the result RDD.



I look at the Storage information and find the RDD has 3 partitions but 2 of 
them have been cached.

Is this a normal behavior? I assume all of partitions should be cached or none 
of them.

If I'm wrong, what are the cases when number of "cached" partitions is less 
than the total number of partitions?



[cid:image001.jpg@01CFA5C3.0AE4B440]

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