Jay Kreps created KAFKA-667:
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Summary: Rename .highwatermark file
Key: KAFKA-667
URL: https://issues.apache.org/jira/browse/KAFKA-667
Project: Kafka
Issue Type: Improvement
Affects Versions: 0.8
Reporter: Jay Kreps
Assignee: Jay Kreps
Priority: Minor
The 0.8 branch currently has a file in each log directory called
.highwatermark
Soon we hope to add two more files in the same format. One will hold the
cleaner position for log deduplication, and the other will hold the flusher
position for log flush. Each of these is sort of a "highwater mark". It would
be good to rename .highwatermark to be a little bit more intuitive when we add
these other files. I propose:
replication-offset-checkpoint
flusher-offset-checkpoint
cleaner-offset-checkpoint
replication-offset-checkpoint would replace the .highwatermark file. I am not
making them dot files since they represent an important part of the persistent
state and so the user should see it. Also shell * doesn't match hidden files,
so if you did something like cp my_log/* to my_backup_log/* you would not get
corresponding .highwatermark file.
I am filing this bug now because it might be nice to just make this trivial
change now and avoid having to handle backwards compatibility later.
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