hadoop-yetus commented on a change in pull request #1264: HDFS-12125. Document the missing EC removePolicy command URL: https://github.com/apache/hadoop/pull/1264#discussion_r312687560
########## File path: hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml ########## @@ -1385,6 +1385,54 @@ </description> </property> +<property> + <name>dfs.image.parallel.load</name> + <value>true</value> + <description> + If true, write sub-section entries to the fsimage index so it can + be loaded in parallel. Also controls whether parallel loading + will be used for an image previously created with sub-sections. + If the image contains sub-sections and this is set to false, + parallel loading will not be used. + </description> +</property> + +<property> + <name>dfs.image.parallel.target.sections</name> + <value>12</value> + <description> + Controls the number of sub-sections that will be written to + fsimage for each section. This should be larger than + dfs.image.parallel.threads, otherwise all threads will not be + used when loading. Ideally, have at least twice the number + of target sections as threads, so each thread must load more + than one section to avoid one long running section affecting + the load time. + </description> +</property> + +<property> + <name>dfs.image.parallel.inode.threshold</name> + <value>1000000</value> + <description> + If the image contains less inodes than this setting, then + do not write sub-sections and hence disable parallel loading. + This is because small images load very quickly in serial and + parallel loading is not needed. + </description> +</property> + +<property> + <name>dfs.image.parallel.threads</name> + <value>4</value> + <description> + The number of threads to use when dfs.image.parallel.load is Review comment: whitespace:end of line ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org
