[HADOOP-7133] CLONE to COMMON - HDFS-1445 Batch the calls in DataStorage to FileUtil.createHardLink(), so we call it once per directory instead of once per file

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.20.2
• Fix Version/s: 0.23.0
• Component/s: util

Release Note

This is the COMMON portion of a fix requiring coordinated change of COMMON and HDFS. Please see HDFS-1445 for HDFS portion and release note.

• Tags: hard links, upgrade, snapshot
• Assignee: Matthew Foley
• Reporter: Matthew Foley
• Created: 09/Feb/11 18:47
• Updated: 15/Nov/11 00:51
• Resolved: 10/Mar/11 23:34

Description

The fix for HDFS-1445 "Batch the calls in DataStorage to FileUtil.createHardLink(), so we call it once per directory instead of once per file" requires coordinated change in COMMON and HDFS. This is the COMMON portion, submitted here under a separate bug to activate the automated testing.

Warning: this patch to COMMON, by itself, will break HDFS. It requires coordinated commit of the HDFS portion of the patch in HDFS-1445.

Issue Links

• blocks: HDFS-1445 Batch the calls in DataStorage to FileUtil.createHardLink(), so we call it once per directory instead of once per file
• blocks: HADOOP-7181 use ThreadLocal for HardLink command buffers