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Konstantin Shvachko commented on HDFS-7056: ------------------------------------------- > Actually Guo and I have finished the POC for this several months ago. But we > couldn't open source it Hi Hu.It shows indeed in the design. Too bad you couldn't open source yours. Hope ours is similar. I know at least getBlocks(snapshotId) method is in common :-) Looking at Jing's comments. > Snapshot support for truncate > ----------------------------- > > Key: HDFS-7056 > URL: https://issues.apache.org/jira/browse/HDFS-7056 > Project: Hadoop HDFS > Issue Type: Sub-task > Components: namenode > Affects Versions: 3.0.0 > Reporter: Konstantin Shvachko > Assignee: Plamen Jeliazkov > Attachments: HDFS-3107-HDFS-7056-combined.patch, HDFS-7056.patch, > HDFSSnapshotWithTruncateDesign.docx > > > Implementation of truncate in HDFS-3107 does not allow truncating files which > are in a snapshot. It is desirable to be able to truncate and still keep the > old file state of the file in the snapshot. -- This message was sent by Atlassian JIRA (v6.3.4#6332)