[HDFS-16730] Update the doc that append to EC files is supported

• Type: Task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.4.0
• Fix Version/s: 3.4.0
• Component/s: documentation, erasure-coding
• Labels: pull-request-available
• Target Version/s: 3.4.0
• Hadoop Flags: Reviewed
• Assignee: Ashutosh Gupta
• Reporter: Wei-Chiu Chuang
• Created: 16/Aug/22 19:48
• Updated: 28/Jan/24 08:15
• Resolved: 16/Aug/22 21:41

Description

Our doc has a statement regarding EC limitations:
https://hadoop.apache.org/docs/r3.3.0/hadoop-project-dist/hadoop-hdfs/HDFSErasureCoding.html#Limitations

append() and truncate() on an erasure coded file will throw IOException.

In fact, HDFS-7663 added the support since Hadoop 3.3.0. The caveat is that it supports "Append to a closed striped file, with NEW_BLOCK flag enabled"

Issue Links

• is related to: HDFS-7663 Erasure Coding: Append on striped file
• links to: GitHub Pull Request #4749