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Yang Yun commented on HDFS-15377: --------------------------------- Thanks [~elgoiri] for the review. I'm sorry for the mistake. updated to HDFS-15377.002.patch. I fixed one checkstyles issue, I think the other one private issue can be ignore for variable 'scanPartSize' is a member of class Conf. > BlockScanner scans one part per round, expect full scans after several rounds > ----------------------------------------------------------------------------- > > Key: HDFS-15377 > URL: https://issues.apache.org/jira/browse/HDFS-15377 > Project: Hadoop HDFS > Issue Type: Improvement > Reporter: Yang Yun > Assignee: Yang Yun > Priority: Minor > Attachments: HDFS-15377.002.patch > > > For reducing disk IO, one block is separated to multiple parts, BlockScanner > scans only one part per round. Expect that after several rounds, the full > block should be scanned > Add a new option "dfs.block.scanner.part.size". the maximum data size per > scan by the block scanner. this value should be the multiple of chunk size, > for example, 512, 1024, 4096 ... > Default value is -1, will disable partial scan. -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org