A Journaled file system does not "fatten" up your files. It is an excellent
level of protection for your file system.

The Journaled file system in some instances will increase write performance.
In the event of a system crash the time required to repair a journaled file
system is a fraction of the time to repair a non journaled file system.

Journaled file system tracks the outstanding writes to disk. In the event of
a system crash, when the system is restarted only the writes to disk that
have not been "committed" are repaired or re-committed. In layman terms;
When the system comes back up and detects a "dirty" file system the log
journal is re-played and only items in the journal are verified.

In a non journalled file system the file system utility has to verify every
single data file on the entire disk to ensure all the file system and
directory information is in tact.

Here is an example; 200 Gig Partition on a SUN Server 12 400MHz CPU without
a journaled file system. System has a kernel panic and crashes. System takes
1.5 hours to perform the file system integrity tests. If the same system had
a journaled file system the time to perform a file system integrity test
would have been moments.

If you are performing system updates on a system without a journaled file
system it would be a very wise idea to check your OS before and after
applying a patch!



---------------------------


I've turned off Journaling on my eMac's 40GB Hard Drive. I've purchased 
too much music, and made too many data bases to allow journaling to 
fatten up my files. True it could potentially make it a little more 
unstable, but I haven't had a problem yet, and I still have 10GB free! 
So the whole, make sure everything is okay before I start deal is 
something I have to practice. And others should too, if they have 
journaling turned off.

  - Jonathan
---------------------------


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