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Posted to common-issues@hadoop.apache.org by GitBox <gi...@apache.org> on 2019/08/13 16:02:27 UTC
[GitHub] [hadoop] sodonnel commented on a change in pull request #1028:
HDFS-14617 - Improve fsimage load time by writing sub-sections to the
fsimage index
sodonnel 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_r313481427
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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.",
Review comment:
I have added a note to hdfs-default.xml for this.
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