lkml.org 
[lkml]   [2006]   [Nov]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: New filesystem for Linux
On Fri, 3 November 2006 02:19:05 +0100, Mikulas Patocka wrote:
> >On Thu, 2 November 2006 22:52:47 +0100, Mikulas Patocka wrote:
> >>
> >>new method to keep data consistent in case of crashes (instead of
> >>journaling),
> >
> >Your 32-bit transaction counter will overflow in the real world. It
> >will take a setup with millions of transactions per second and even
> >then not trigger for a few years, but when it hits your filesystem,
> >the administrator of such a beast won't be happy at all. :)
>
> If it overflows, it increases crash count instead. So really you have 2^47
> transactions or 65536 crashes and 2^31 transactions between each crash.

I am fully aware the counters are effectively 48-bit. If they were
just 32-bit, you would likely have hit the problem yourself already.

Jörn

--
Data expands to fill the space available for storage.
-- Parkinson's Law
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-11-03 11:21    [W:0.087 / U:6.752 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site