Journalling FS and Soft Updates comparision

[Xin LI]

Hi, David,

在 2005-02-15二的 22:35 -0500，David Rhodus写道：
> > Softupdates really aren't a whole lot different from journalling.  Both
> 
> No, journalling and soft updates are orthogonal technologies; they
> do not solve the same problem space, although there is some minor
> overlap.  Soft updates is not able to solve all the problems which
> journaling can.

Would you please give some examples?  I think a file system journalling
is different from what we have seen in applications, e.g. databases,
since the primary goal of having a journal is to make the file system
recoverable to last checkpoint, is that correct, or maybe I have missed
something?

Thanks!

Cheers,
-- 
Xin LI <delphij delphij net>  http://www.delphij.net/
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