Hi Dev
In short, is there a full introduction to hdfs consistency model?
I have already read some miscellaneous stuffs, e.g.
- some simple scenario
- read+read, ok
- write+write, forbidden (guaranteed be lease)
- design doc of append, truncate
- hflush/hsync
- top pages of google "hdfs consistency model"
But I didn't find a detailed doc/link to clarify this topic, especially how to
deal with concurrent read+write, e.g.:
Can a later reader can read the contents which the writer (doesn't close the
file yet) appended? Is hflush/hsync the only ways to ensure the consistency?
etc..
I known the GFS paper has a specific section to clarify this topic, so I think
hdfs may has a similar one.
Very thanks for helpful link.
--
Regards,
Hongxu.
