[HADOOP-6732] Improve FsShell's heap consumption by switching to listStatus that returns an iterator

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Incomplete
• Assignee: Daryn Sharp
• Reporter: Hairong Kuang
• Created: 29/Apr/10 00:37
• Updated: 30/Jul/14 18:34
• Resolved: 30/Jul/14 18:34

Description

When listing a large directory from the command line using the default heap configuration, FsShell often runs out of memory. This is because all stats of the entries under the directory need to be in memory before printing them. The new API listStatus that returns an iterator of FileStatus, which implemented in HDFS-1091, no longer requires that all entries are fetched first. Thus switching to this new API will greatly improve the use of heap space.

Issue Links

• is blocked by: HADOOP-6424 Port FsShell to FileContext