[ https://issues.apache.org/jira/browse/HADOOP-14520?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Georgi Chalakov updated HADOOP-14520: ------------------------------------- Status: Patch Available (was: Open) fixes javadoc issues. > WASB: Block compaction for Azure Block Blobs > -------------------------------------------- > > Key: HADOOP-14520 > URL: https://issues.apache.org/jira/browse/HADOOP-14520 > Project: Hadoop Common > Issue Type: Improvement > Components: fs/azure > Affects Versions: 3.0.0-alpha3 > Reporter: Georgi Chalakov > Assignee: Georgi Chalakov > Attachments: HADOOP-14520-006.patch, HADOOP-14520-05.patch, > HADOOP_14520_07.patch, HADOOP_14520_08.patch, HADOOP_14520_09.patch > > > Block Compaction for WASB allows uploading new blocks for every hflush/hsync > call. When the number of blocks is above 32000, next hflush/hsync triggers > the block compaction process. Block compaction replaces a sequence of blocks > with one block. From all the sequences with total length less than 4M, > compaction chooses the longest one. It is a greedy algorithm that preserve > all potential candidates for the next round. Block Compaction for WASB > increases data durability and allows using block blobs instead of page blobs. > By default, block compaction is disabled. Similar to the configuration for > page blobs, the client needs to specify HDFS folders where block compaction > over block blobs is enabled. > Results for HADOOP_14520_07.patch > tested endpoint: fs.azure.account.key.hdfs4.blob.core.windows.net > Tests run: 777, Failures: 0, Errors: 0, Skipped: 155 -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org