The performance hit is supposed to be up to 10% during intense disk activity. In practice, if there is a hit, I haven't noticed it in the 9+ months it's been turned on. The point of a journaling is being able to quickly return a disk to a stable pre-crash state following an improper shutdown. That's an issue for anyone, not just servers.

I don't believe in taking chances with file system corruption, yet checking an entire volume is an unattractive alternative; it takes too long and isn't really necessary. Journaling allows for automatic checking of only those files open at the time of a crash (etc).

People who regularly use OS 9 should not use journaling, unless they want to turn it off and back on before and after every restart out of OS X. Those who do heavy A/V work on their boot drives may find the performance hit matters and will want to avoid that. (Doing heavy A/V work on your boot drive, itself, isn't recommended, but that's another matter.)

On Sunday, August 31, 2003, at 10:23 AM, John Wilson wrote:

I'm not entirely sure (but the people on the list will be glad to jump down my throat if I'm wrong) but I remember reading when journaling first became available (10.2?) that it could cause as much as a 20% performance hit. Also, the article stated that it was mainly for servers where adminstrators needed to be able to restore the system to a point prior to a crash. John


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