>>>>> "TLS" == Thor Lancelot Simon <tls@rek.tjls.com> writes:

TLS> Ding!  Read John Kohl's paper on online backup of LFS using a special
TLS> cleaner (also note that this is how WAFL does snapshots).  LFS makes
TLS> things like this very, very simple, elegant, and clean.

Wow, someone read that from 10 years ago?  Winter USENIX 1993, San
Diego.

HighLight: Using a Log-structured File System for Tertiary Storage Management
John T. Kohl, University of California, Berkeley and Digital Equipment
Corporation; Carl Staelin, Hewlett-Packard Laboratories; Michael
Stonebraker, University of California, Berkeley 

It's also my MS thesis and published as a TR from UC Berkeley.
http://s2k-ftp.cs.berkeley.edu:8000/postgres/papers/UCB-MS-jtkohl.pdf

It didn't go very far (to my knowledge, nobody picked it up afterwards,
and I didn't deep get into any of the interesting policy questions).
-- 
==John Kohl <jtk@kolvir.arlington.ma.us>, <john_kohl@alum.mit.edu>
Home page: <http://john.kohl.home.attbi.com/>