Hi Josh, So then 2^31 (2.2Bilion) * 2^6 (length of double) = 128GB would be max array byte length with Doubles?
2014-03-12 11:30 GMT-07:00 Josh Marcus <jmar...@meetup.com>: > Aureliano, > > Just to answer your second question (unrelated to Spark), arrays in java > and scala can't be larger than the maximum value of an Integer > (Integer.MAX_VALUE), which means that arrays are limited to about 2.2 > billion elements. > > --j > > > > On Wed, Mar 12, 2014 at 1:08 PM, Aureliano Buendia > <buendia...@gmail.com>wrote: > >> Hi, >> >> I asked a similar question a while ago, didn't get any answers. >> >> I'd like to share a 10 gb double array between 50 to 100 workers. The >> physical memory of workers is over 40 gb, so it can fit in each memory. The >> reason I'm sharing this array is that a cartesian operation is applied to >> this array, and I want to avoid network shuffling. >> >> 1. Is Spark broadcast built for pushing variables of gb size? Does it >> need special configurations (eg akka config, etc) to work under this >> condition? >> >> 2. (Not directly related to spark) Is the an upper limit for scala/java >> arrays other than the physical memory? Do they stop working when the array >> elements count exceeds a certain number? >> > >
