[Ti] Journeling.

[silvo conticello]

I think that  journaling in Panther includes also some file 
defragmentation on the fly. Or am I mistaken?
Silvo

On 5 Aug 2004, at 16:43, David DelMonte wrote:

> On Aug 5, 2004, at 6:37 PM, Glenn L. Austin wrote:
>
>> on 8/5/04 3:02 AM, David DelMonte at ddelmonte at mac.com wrote:
>>
>>> Hi all.
>>>
>>> What does disk journalling provide?
>>
>> Basically, a journalled file system provides an additional, smaller
>> operation to track changes made to the file system before the actual
>> operation is executed. After the operation is complete, the journal 
>> entry is
>> marked as complete.  Basically, the OS keeps track of what it's 
>> doing, kind
>> of "going to do this," "doing this," "done with this."
>>
>> What it means to you is that if your computer crashes at some point, 
>> then
>> restarting the computer is much faster because all that needs to be 
>> done to
>> make the disk consistent is to play back the journal entries and 
>> execute the
>> operations.
>>
>>> What resources does it cost?
>>
>> Just some disk space and cost of some disk performance when writing.
>>
Silvo Conticello
Albook 17" 1.5GHz/1.5Gb RAM/80Gb HD/OS10.3.4
iMac 1GHz/500Mb Ram/80Gb HD/OS10.3.2/17" display
E-mail: silvoc at tiscali.it
Cambridge
UK