mukund-thakur commented on a change in pull request #3110:
URL: https://github.com/apache/hadoop/pull/3110#discussion_r655109352
##########
File path:
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/AbfsConfiguration.java
##########
@@ -878,6 +884,10 @@ public SASTokenProvider getSASTokenProvider() throws
AzureBlobFileSystemExceptio
}
}
+ public int getReadAheadRange() {
+ return this.readAheadRange;
Review comment:
Yes but it is just a getter and consistent with other getters.
##########
File path:
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/constants/FileSystemConfigurations.java
##########
@@ -62,6 +62,8 @@
public static final boolean DEFAULT_OPTIMIZE_FOOTER_READ = false;
public static final boolean DEFAULT_ALWAYS_READ_BUFFER_SIZE = false;
public static final int DEFAULT_READ_AHEAD_BLOCK_SIZE = 4 * ONE_MB;
+ // Default value of read ahead range.
+ public static final int DEFAULT_READ_AHEAD_RANGE = 64 * ONE_KB; // 64 KB
Review comment:
Ok. This as per suggestion from Rajesh after his experiments.
https://github.com/apache/hadoop/pull/2307#issuecomment-694159756
##########
File path:
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/services/AbfsInputStreamContext.java
##########
@@ -115,6 +124,8 @@ public AbfsInputStreamContext build() {
readAheadBlockSize = readBufferSize;
}
// Validation of parameters to be done here.
+ Preconditions.checkArgument(readAheadRange > 0,
Review comment:
It doesn't makes sense right? If set to 0 means disabling readAhead.
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