Steve Loughran created HADOOP-15492: ---------------------------------------
Summary: increase performance of s3guard import command Key: HADOOP-15492 URL: https://issues.apache.org/jira/browse/HADOOP-15492 Project: Hadoop Common Issue Type: Sub-task Components: fs/s3 Reporter: Steve Loughran Some perf improvements which spring to mind having looked at the s3guard import command Key points: it can handle the import of a tree with existing data better # if the bucket is already under s3guard, then the listing will return all listed files, which will then be put() again. # import calls {{putParentsIfNotPresent()}}, but DDBMetaStore.put() will do the parent creation anyway # For each entry in the store (i.e. a file), the full parent listing is created, then a batch write created to put all the parents and the actual file As a result, it's at risk of doing many more put calls than needed, especially for wide/deep directory trees. It would be much more efficient to put all files in a single directory as part of 1+ batch request, with 1 parent tree. Better yet: a get() of that parent could skip the put of parent entries. -- 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