HDFS-7397. Add more detail to the documentation for the conf key "dfs.client.read.shortcircuit.streams.cache.size" (Brahma Reddy Battula via Colin P. McCabe)
Project: http://git-wip-us.apache.org/repos/asf/hadoop/repo Commit: http://git-wip-us.apache.org/repos/asf/hadoop/commit/0b1e184c Tree: http://git-wip-us.apache.org/repos/asf/hadoop/tree/0b1e184c Diff: http://git-wip-us.apache.org/repos/asf/hadoop/diff/0b1e184c Branch: refs/heads/YARN-2928 Commit: 0b1e184ccb8540ff5216a21ff580314ecc92ac74 Parents: aa5c6f4 Author: Colin Patrick Mccabe <[email protected]> Authored: Mon May 4 12:50:29 2015 -0700 Committer: Zhijie Shen <[email protected]> Committed: Mon May 4 12:59:02 2015 -0700 ---------------------------------------------------------------------- hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt | 4 ++++ .../hadoop-hdfs/src/main/resources/hdfs-default.xml | 2 +- 2 files changed, 5 insertions(+), 1 deletion(-) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/hadoop/blob/0b1e184c/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt ---------------------------------------------------------------------- diff --git a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt index a365b86..21d73ba 100644 --- a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt +++ b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt @@ -500,6 +500,10 @@ Release 2.8.0 - UNRELEASED HDFS-8249. Separate HdfsConstants into the client and the server side class. (wheat9) + HDFS-7397. Add more detail to the documentation for the conf key + "dfs.client.read.shortcircuit.streams.cache.size" (Brahma Reddy Battula via + Colin P. McCabe) + OPTIMIZATIONS HDFS-8026. Trace FSOutputSummer#writeChecksumChunks rather than http://git-wip-us.apache.org/repos/asf/hadoop/blob/0b1e184c/hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml ---------------------------------------------------------------------- diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml b/hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml index f03c0fb..e3e4323 100644 --- a/hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml +++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml @@ -2063,7 +2063,7 @@ <value>256</value> <description> The DFSClient maintains a cache of recently opened file descriptors. - This parameter controls the size of that cache. + This parameter controls the maximum number of file descriptors in the cache. Setting this higher will use more file descriptors, but potentially provide better performance on workloads involving lots of seeks.
