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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.spark.scheduler
import org.apache.spark.storage.BlockManagerId
import org.apache.spark.{SparkConf, SparkFunSuite}
import org.apache.spark.serializer.JavaSerializer
import org.roaringbitmap.RoaringBitmap
import scala.util.Random
class MapStatusSuite extends SparkFunSuite {
test("compressSize") {
assert(MapStatus.compressSize(0L) === 0)
assert(MapStatus.compressSize(1L) === 1)
assert(MapStatus.compressSize(2L) === 8)
assert(MapStatus.compressSize(10L) === 25)
assert((MapStatus.compressSize(1000000L) & 0xFF) === 145)
assert((MapStatus.compressSize(1000000000L) & 0xFF) === 218)
// This last size is bigger than we can encode in a byte, so check that we just return 255
assert((MapStatus.compressSize(1000000000000000000L) & 0xFF) === 255)
}
test("decompressSize") {
assert(MapStatus.decompressSize(0) === 0)
for (size <- Seq(2L, 10L, 100L, 50000L, 1000000L, 1000000000L)) {
val size2 = MapStatus.decompressSize(MapStatus.compressSize(size))
assert(size2 >= 0.99 * size && size2 <= 1.11 * size,
"size " + size + " decompressed to " + size2 + ", which is out of range")
}
}
test("MapStatus should never report non-empty blocks' sizes as 0") {
import Math._
for (
numSizes <- Seq(1, 10, 100, 1000, 10000);
mean <- Seq(0L, 100L, 10000L, Int.MaxValue.toLong);
stddev <- Seq(0.0, 0.01, 0.5, 1.0)
) {
val sizes = Array.fill[Long](numSizes)(abs(round(Random.nextGaussian() * stddev)) + mean)
val status = MapStatus(BlockManagerId("a", "b", 10), sizes)
val status1 = compressAndDecompressMapStatus(status)
for (i <- 0 until numSizes) {
if (sizes(i) != 0) {
val failureMessage = s"Failed with $numSizes sizes with mean=$mean, stddev=$stddev"
assert(status.getSizeForBlock(i) !== 0, failureMessage)
assert(status1.getSizeForBlock(i) !== 0, failureMessage)
}
}
}
}
test("large tasks should use " + classOf[HighlyCompressedMapStatus].getName) {
val sizes = Array.fill[Long](2001)(150L)
val status = MapStatus(null, sizes)
assert(status.isInstanceOf[HighlyCompressedMapStatus])
assert(status.getSizeForBlock(10) === 150L)
assert(status.getSizeForBlock(50) === 150L)
assert(status.getSizeForBlock(99) === 150L)
assert(status.getSizeForBlock(2000) === 150L)
}
test("HighlyCompressedMapStatus: estimated size should be the average non-empty block size") {
val sizes = Array.tabulate[Long](3000) { i => i.toLong }
val avg = sizes.sum / sizes.filter(_ != 0).length
val loc = BlockManagerId("a", "b", 10)
val status = MapStatus(loc, sizes)
val status1 = compressAndDecompressMapStatus(status)
assert(status1.isInstanceOf[HighlyCompressedMapStatus])
assert(status1.location == loc)
for (i <- 0 until 3000) {
val estimate = status1.getSizeForBlock(i)
if (sizes(i) > 0) {
assert(estimate === avg)
}
}
}
def compressAndDecompressMapStatus(status: MapStatus): MapStatus = {
val ser = new JavaSerializer(new SparkConf)
val buf = ser.newInstance().serialize(status)
ser.newInstance().deserialize[MapStatus](buf)
}
test("RoaringBitmap: runOptimize succeeded") {
val r = new RoaringBitmap
(1 to 200000).foreach(i =>
if (i % 200 != 0) {
r.add(i)
}
)
val size1 = r.getSizeInBytes
val success = r.runOptimize()
r.trim()
val size2 = r.getSizeInBytes
assert(size1 > size2)
assert(success)
}
test("RoaringBitmap: runOptimize failed") {
val r = new RoaringBitmap
(1 to 200000).foreach(i =>
if (i % 200 == 0) {
r.add(i)
}
)
val size1 = r.getSizeInBytes
val success = r.runOptimize()
r.trim()
val size2 = r.getSizeInBytes
assert(size1 === size2)
assert(!success)
}
}
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