[jira] [Comment Edited] (HADOOP-15209) DistCp to eliminate needless deletion of files under already-deleted directories
[ https://issues.apache.org/jira/browse/HADOOP-15209?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16393356#comment-16393356 ] Steve Loughran edited comment on HADOOP-15209 at 3/9/18 6:43 PM: - Testing: local, s3a, adl, wasb IT tests, command line updates including to an s3a endpoint running inconsistently. oh, and I tried FTP. Doesn't work as a dest; never has. was (Author: ste...@apache.org): Testing: local, s3a, adl, wasb IT tests, command line updates including to an s3a endpoint running inconsistently. > DistCp to eliminate needless deletion of files under already-deleted > directories > > > Key: HADOOP-15209 > URL: https://issues.apache.org/jira/browse/HADOOP-15209 > Project: Hadoop Common > Issue Type: Improvement > Components: tools/distcp >Affects Versions: 2.9.0 >Reporter: Steve Loughran >Assignee: Steve Loughran >Priority: Major > Attachments: HADOOP-15209-001.patch, HADOOP-15209-002.patch, > HADOOP-15209-003.patch, HADOOP-15209-004.patch, HADOOP-15209-005.patch, > HADOOP-15209-006.patch, HADOOP-15209-007.patch > > > DistCP issues a delete(file) request even if is underneath an already deleted > directory. This generates needless load on filesystems/object stores, and, if > the store throttles delete, can dramatically slow down the delete operation. > If the distcp delete operation can build a history of deleted directories, > then it will know when it does not need to issue those deletes. > Care is needed here to make sure that whatever structure is created does not > overload the heap of the process. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org
[jira] [Comment Edited] (HADOOP-15209) DistCp to eliminate needless deletion of files under already-deleted directories
[ https://issues.apache.org/jira/browse/HADOOP-15209?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16392038#comment-16392038 ] Aaron Fabbri edited comment on HADOOP-15209 at 3/8/18 10:42 PM: I will try to review / test this today. You feel like this is ready to commit? was (Author: fabbri): I will try to review / test this today. > DistCp to eliminate needless deletion of files under already-deleted > directories > > > Key: HADOOP-15209 > URL: https://issues.apache.org/jira/browse/HADOOP-15209 > Project: Hadoop Common > Issue Type: Improvement > Components: tools/distcp >Affects Versions: 2.9.0 >Reporter: Steve Loughran >Assignee: Steve Loughran >Priority: Major > Attachments: HADOOP-15209-001.patch, HADOOP-15209-002.patch, > HADOOP-15209-003.patch, HADOOP-15209-004.patch, HADOOP-15209-005.patch, > HADOOP-15209-006.patch > > > DistCP issues a delete(file) request even if is underneath an already deleted > directory. This generates needless load on filesystems/object stores, and, if > the store throttles delete, can dramatically slow down the delete operation. > If the distcp delete operation can build a history of deleted directories, > then it will know when it does not need to issue those deletes. > Care is needed here to make sure that whatever structure is created does not > overload the heap of the process. -- This message was sent by Atlassian JIRA (v7.6.3#76005) - To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org
