Linked by Rahul on Fri 31st Oct 2008 16:12 UTC
Linux InternetNews talks to developers and vendors about the rise of Btrfs as a successor to Ext4. Though Ext4 adds extents, Chris Mason, Btrfs developer noted that BTRFS adds a number of other features beyond that. Among those features are items like snapshotting, online file consistency checks and the ability to perform fast incremental backups. BTRFS (pronounced better FS) is currently under development in an effort led by Oracle engineer Chris Mason. With the support of Intel, Red Hat, HP, IBM, BTRFS could become the engine that brings next generation filesystem capabilities to Linux.
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RE[2]: Funny
by Arun on Sat 1st Nov 2008 19:33 UTC in reply to "RE: Funny"
Arun
Member since:
2005-07-07


In the case of silent corruption as a result of hardware, well, you aren't going to recover anything if you don't have redundancy, regardless of whether you run ZFS or not. In any event, you want to solve the issue rather than detecting it and thinking you're brilliant, and either the hardware gets fixed or you move to something else. Either way, it's a hardware issue and drives in particular need to get better and do their own data integrity checks. That issue will not change with a new filesystem.


Please elaborate how you go about fixing something you can't even detect?


I think you're funny. If ZFS (or BtrFS) detects silent corruption then you need to do something about it. If you can't, and in most cases you can't really fix it because it's an esoteric hardware or driver issue, then the feature is essentially useless. You will forever be firefighting and without redundancy you will lose data regardless.


Again if you have no clue it is happening how do you go about fixing it?

In many ways, its a feature more useful to pass on to kernel developers and hardware manufacturers because they're the ones who can do something about it. I suppose those who can make best use of it will be those with the better development community ;-).


Again if the end user can't detect corruption since it is "silent" how does one inform the developers or hardware guys?



I'm sorry, but while some form of silent corruption detection is nice, your problems have only just started. I feel for you that silent corruption detection just hasn't generated the level of excitement intended with ZFS, and henceforth Solaris, but there you are.


The only place it hasn't generated any excitement is in your head. Everyone else including BTRFS developers and Gentoo developers took notice and are doing something about it. Meanwhile you are still trumpeting a very flawed view point.

http://storagemojo.com/2007/09/19/cerns-data-corruption-research/

CERN did silent data corruption research and found it to be a major problem.

Here is the link to the paper:
http://indico.cern.ch/getFile.py/access?contribId=3&sessionId=0&res...

Edited 2008-11-01 19:50 UTC

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