jojochuang commented on a change in pull request #1028: HDFS-14617 - Improve
fsimage load time by writing sub-sections to the fsimage index
URL: https://github.com/apache/hadoop/pull/1028#discussion_r310339950
##########
File path:
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSImageFormatProtobuf.java
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@@ -525,6 +689,59 @@ long save(File file, FSImageCompression compression)
throws IOException {
}
}
+ private void enableSubSectionsIfRequired() {
+ boolean parallelEnabled = conf.getBoolean(
+ DFSConfigKeys.DFS_IMAGE_PARALLEL_LOAD_KEY,
+ DFSConfigKeys.DFS_IMAGE_PARALLEL_LOAD_DEFAULT);
+ int inodeThreshold = conf.getInt(
+ DFSConfigKeys.DFS_IMAGE_PARALLEL_INODE_THRESHOLD_KEY,
+ DFSConfigKeys.DFS_IMAGE_PARALLEL_INODE_THRESHOLD_DEFAULT);
+ int targetSections = conf.getInt(
+ DFSConfigKeys.DFS_IMAGE_PARALLEL_TARGET_SECTIONS_KEY,
+ DFSConfigKeys.DFS_IMAGE_PARALLEL_TARGET_SECTIONS_DEFAULT);
+ boolean compressionEnabled = conf.getBoolean(
+ DFSConfigKeys.DFS_IMAGE_COMPRESS_KEY,
+ DFSConfigKeys.DFS_IMAGE_COMPRESS_DEFAULT);
+
+ if (parallelEnabled) {
+ if (compressionEnabled) {
+ LOG.warn("Parallel Image loading is not supported when {} is set to"
+
+ " true. Parallel loading will be disabled.",
+ DFSConfigKeys.DFS_IMAGE_COMPRESS_KEY);
+ writeSubSections = false;
+ return;
+ }
+ if (targetSections <= 0) {
+ LOG.warn("{} is set to {}. It must be greater than zero. Setting to"
+
Review comment:
Add a space between to and default.
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