Github user mridulm commented on a diff in the pull request:
https://github.com/apache/spark/pull/17295#discussion_r106779213
--- Diff: core/src/main/scala/org/apache/spark/storage/DiskStore.scala ---
@@ -17,48 +17,61 @@
package org.apache.spark.storage
-import java.io.{FileOutputStream, IOException, RandomAccessFile}
+import java.io._
import java.nio.ByteBuffer
+import java.nio.channels.{Channels, ReadableByteChannel,
WritableByteChannel}
import java.nio.channels.FileChannel.MapMode
+import java.nio.charset.StandardCharsets.UTF_8
-import com.google.common.io.Closeables
+import scala.collection.mutable.ListBuffer
-import org.apache.spark.SparkConf
+import com.google.common.io.{ByteStreams, Closeables, Files}
+import io.netty.channel.FileRegion
+import io.netty.util.AbstractReferenceCounted
+
+import org.apache.spark.{SecurityManager, SparkConf}
import org.apache.spark.internal.Logging
-import org.apache.spark.util.Utils
+import org.apache.spark.network.buffer.ManagedBuffer
+import org.apache.spark.security.CryptoStreamUtils
+import org.apache.spark.util.{ByteBufferInputStream, Utils}
import org.apache.spark.util.io.ChunkedByteBuffer
/**
* Stores BlockManager blocks on disk.
*/
-private[spark] class DiskStore(conf: SparkConf, diskManager:
DiskBlockManager) extends Logging {
+private[spark] class DiskStore(
+ conf: SparkConf,
+ diskManager: DiskBlockManager,
+ securityManager: SecurityManager) extends Logging {
private val minMemoryMapBytes =
conf.getSizeAsBytes("spark.storage.memoryMapThreshold", "2m")
def getSize(blockId: BlockId): Long = {
- diskManager.getFile(blockId.name).length
+ val file = diskManager.getMetadataFile(blockId)
+ Files.toString(file, UTF_8).toLong
}
/**
* Invokes the provided callback function to write the specific block.
*
* @throws IllegalStateException if the block already exists in the disk
store.
*/
- def put(blockId: BlockId)(writeFunc: FileOutputStream => Unit): Unit = {
+ def put(blockId: BlockId)(writeFunc: WritableByteChannel => Unit): Unit
= {
if (contains(blockId)) {
throw new IllegalStateException(s"Block $blockId is already present
in the disk store")
}
logDebug(s"Attempting to put block $blockId")
val startTime = System.currentTimeMillis
val file = diskManager.getFile(blockId)
- val fileOutputStream = new FileOutputStream(file)
+ val out = new CountingWritableChannel(openForWrite(file))
var threwException: Boolean = true
try {
- writeFunc(fileOutputStream)
+ writeFunc(out)
+ Files.write(out.getCount().toString(),
diskManager.getMetadataFile(blockId), UTF_8)
threwException = false
} finally {
try {
- Closeables.close(fileOutputStream, threwException)
+ Closeables.close(out, threwException)
--- End diff --
IOException can be thrown in close(), we will need to remove block (and
meta) in that case as well.
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