Re: dedicated logging devices

From: I Lee Hetherington (ilh@sls.lcs.mit.edu)
Date: Fri Jun 09 2000 - 12:52:47 EST


Andreas Dilger wrote:

> Xuan, you write:
> > Is it reasonable to use the 50 bytes of /dev/nvram for logging or is it just
> > too small?
>
> It is definitely too small to write any transactions there, although it
> may be possible to use it for a bitmap of some sort (400 bits). However,
> my understanding would be that the CMOS NVRAM would be much too slow to
> use reasonably, and it only has a limited number of writes, so using it
> for part of a filesystem will surely mean death for it. Correct me if
> I'm wrong for modern motherboard NVRAM.

For example, our NetApp F760 has 32MB of NVRAM.

--Lee Hetherington

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