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Wei-Chiu Chuang commented on HADOOP-18596: ------------------------------------------ This change and HADOOP-18633 failed a hbase-filesystem test. Should this behavior be turned on by default or should we fix the test in hbase-filesystem? > Distcp -update between different cloud stores to use modification time while > checking for file skip. > ---------------------------------------------------------------------------------------------------- > > Key: HADOOP-18596 > URL: https://issues.apache.org/jira/browse/HADOOP-18596 > Project: Hadoop Common > Issue Type: Improvement > Components: tools/distcp > Reporter: Mehakmeet Singh > Assignee: Mehakmeet Singh > Priority: Major > Labels: pull-request-available > Fix For: 3.3.6 > > > Distcp -update currently relies on File size, block size, and Checksum > comparisons to figure out which files should be skipped or copied. > Since different cloud stores have different checksum algorithms we should > check for modification time as well to the checks. > This would ensure that while performing -update if the files are perceived to > be out of sync we should copy them. The machines between which the file > transfers occur should be in time sync to avoid any extra copies. > Improving testing and documentation for modification time checks between > different object stores to ensure no incorrect skipping of files. -- This message was sent by Atlassian Jira (v8.20.10#820010) --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org