[jira] Commented: (MAPREDUCE-2257) distcp can copy blocks in parallel
[ https://issues.apache.org/jira/browse/MAPREDUCE-2257?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13008557#comment-13008557 ] gopikannan venugopalsamy commented on MAPREDUCE-2257: - I wanna work on this, hey nikhil .. would you like to discuss > distcp can copy blocks in parallel > -- > > Key: MAPREDUCE-2257 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-2257 > Project: Hadoop Map/Reduce > Issue Type: Improvement > Components: distcp >Reporter: dhruba borthakur >Assignee: dhruba borthakur > > The minimum unit of work for a distcp task is a file. We have files that are > greater than 1 TB with a block size of 1 GB. If we use distcp to copy these > files, the tasks either take a long long long time or finally fails. A better > way for distcp would be to copy all the source blocks in parallel, and then > stich the blocks back to files at the destination via the HDFS Concat API > (HDFS-222) -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira
[jira] Commented: (MAPREDUCE-2257) distcp can copy blocks in parallel
[ https://issues.apache.org/jira/browse/MAPREDUCE-2257?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12989456#comment-12989456 ] gopikannan venugopalsamy commented on MAPREDUCE-2257: - Hello, I wish to contribute to this issue but I am new to this project.Can you guys give some tips for where to start from > distcp can copy blocks in parallel > -- > > Key: MAPREDUCE-2257 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-2257 > Project: Hadoop Map/Reduce > Issue Type: Improvement > Components: distcp >Reporter: dhruba borthakur >Assignee: dhruba borthakur > > The minimum unit of work for a distcp task is a file. We have files that are > greater than 1 TB with a block size of 1 GB. If we use distcp to copy these > files, the tasks either take a long long long time or finally fails. A better > way for distcp would be to copy all the source blocks in parallel, and then > stich the blocks back to files at the destination via the HDFS Concat API > (HDFS-222) -- This message is automatically generated by JIRA. - For more information on JIRA, see: http://www.atlassian.com/software/jira
