Re: ext4 features

[Benny Amorsen]

>>>>> "DC" == Diego Calleja <diegocg@xxxxxxxxx> writes:

DC> El Mon, 03 Jul 2006 15:46:55 -0600, "Jeff V. Merkey"
DC> <jmerkey@xxxxxxxxxxxxxxxxxxxxx> escribiÃ:

>> Add a salvagable file system to ext4, i.e. when a file is deleted,
>> you just rename it and move it to a directory called DELETED.SAV
>> and recycle the files as people allocate new ones. Easy to do
>> (internal "mv" of


DC> Easily doable in userspace, why bother with kernel programming

In userspace you can't automatically delete the files when the space
becomes needed. The LD_PRELOAD/glibc methods also have the
disadvantage of having to figure out where a file goes when it's
deleted, depending on which device it happens to reside on. Demanding
read access to /proc/mounts just to do rm could cause problems.

Userspace has had 10 years to invent a good solution. If it was so
easy, it would probably have been done.


/Benny


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