[HADOOP-9119] Add test to FileSystemContractBaseTest to verify integrity of overwritten files

• Type: Test
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.0.3-alpha
• Component/s: fs, test
• Hadoop Flags: Reviewed

Release Note

Patches adds more tests to verify overwritten and more complex operations -write-delete-overwrite. By using differently sized datasets and different data inside, these tests verify that the overwrite really did take place. While HDFS meets all these requirements directly, eventually consistent object stores may not -hence these tests.

• Assignee: Steve Loughran
• Reporter: Steve Loughran
• Created: 05/Dec/12 14:59
• Updated: 02/May/13 02:29
• Resolved: 08/Jan/13 17:02

Description

The test FileSystemContractBaseTest.testOverwrite() is meant to verify that overwrites work -but it only overwrites a zero byte file with some data and only checks for length. This can hide problems where there overwrite was somehow corrupted.

Issue Links

• incorporates: HADOOP-9118 FileSystemContractBaseTest test data for read/write isn't rigorous enough
• is depended upon by: HADOOP-8545 Filesystem Implementation for OpenStack Swift