Pros and cons of ufs logging?
[269 byte] By [jmiturbe] at [2007-11-25 23:11:58] 
Hello,I齰e read that ufs logging eliminates ufs filesystems inconsistency, but is not enabled by default. Why? Because of extra resource usage? Which are the pros and the cons of using this filesystem feature?Thanks in advance,jmiturbe
# 1
Ufs logging is a big deal with mission critical filesystems.
With ufs logging the state of a filesystem is always in a
reported condition.
In short: If an unexpected event accours and the system is
forced to bootstrap again the time the system will be ready to
serve services will be shorter compared to a filesystem without
logging.
Ufs logging is a relativ new feature to solaris but with disksuite
it was availible within transdevices for a longer time.
Other vendors offer highperformance filesystem with the same features.
In my opinion there is no bad point about ufs logging.
It is definitly a feature not a but :-)
berndschwarz at 2007-7-5 18:01:54 >
# 2
Unless you don't count losing 5% of your filesystem to logging I'd agree with you :-) AndrewNess at 2007-7-5 18:01:54 >
# 3
are there any concerns with using ufs logging on / /var /usr ? phusniken at 2007-7-5 18:01:54 >
# 4
Nope - I run ufs logging on all my UFS partitions on my home box without any issues.--A. AndrewNess at 2007-7-5 18:01:54 >
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