[FLUME-1968] FileChannel new format while being backwards compatible

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Channel, File Channel
• Assignee: Unassigned
• Reporter: Brock Noland
• Created: 04/Apr/13 16:03
• Updated: 12/Jun/13 03:51

Description

There are a couple issues with the current format:

1) We have to track the offset at checkpoint time and write the offset to a special location so we can seek to that offset during replay. In FLUME-1516 we are tracking two offsets.

2) We have no way to detect partial writes FLUME-1967

3) We can only checksum the body of the event, not the entire record FLUME-1485 and therefore cannot detect corruption outside an event body.

Issue Links

• blocks: FLUME-1946 Tolerate disk failure in FileChannel
• is related to: FLUME-2077 Umbrella JIRA to track file channel improvments
• relates to: FLUME-1967 FileChannel should write trailing indicator
• relates to: FLUME-1485 FileChannel should support checksum
• relates to: FLUME-1516 FileChannel Write Dual Checkpoints to avoid replays
• relates to: FLUME-1580 FileChannel some sets of log files cannot be replayed

Sub-Tasks

• Create filechannel v2: Open
• Create file channel file system abstraction: Open