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An unexpected perf feature
LWN.net Weekly Edition for May 16, 2013
A look at the PyPy 2.0 release
PostgreSQL 9.3 beta: Federated databases and more
LWN.net Weekly Edition for May 9, 2013
The purpose of a journaling filesystem is *only* to ease and speed the task of recovery after an unclean shutdown. I can't emphasise this point strongly enough.
it's about the crashes!!!
Posted Mar 19, 2009 0:35 UTC (Thu) by butlerm (subscriber, #13312)
That is not quite correct. The primary purpose of journaling in typical
journaling filesystems is to preserve metadata integrity. Filesystem
repair tools cannot repair metadata that has never been written.
The secondary purpose of journaling is to loosen ordering restrictions on
meta data updates. Assuming you want your filesystem to be there after an
unclean shutdown, that is a major advantage.
Finally, journaling filesystems are not metaphysically prohibited from
using their journals to do other useful things, such as store meta-data
undo information, for example.
Posted Mar 19, 2009 5:56 UTC (Thu) by xoddam (subscriber, #2322)
Posted Mar 20, 2009 21:17 UTC (Fri) by butlerm (subscriber, #13312)
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