Messages in this thread | | | Date | Fri, 3 Nov 2006 11:19:01 +0100 | From | Jörn Engel <> | Subject | Re: New filesystem for Linux |
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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
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