How to minimize the number of writes to CF card?

[Michael Sierchio]

On Wed, Aug 26, 2015 at 1:57 PM, Christian Weisgerber <naddy at mips.inka.de>
wrote:

> On 2015-08-25, Matthew Seaman <matthew at FreeBSD.org> wrote:
>
> > However, I don't think softupdates has much effect on the /number/ or
> > writes made to the filesystem.  It's all about re-ordering writes to
> > ensure metadata consistency.
>
> Time to re-read Kirk's original paper.
>
> http://www.usenix.org/publications/library/proceedings/usenix99/full_papers/mckusick/mckusick.pdf
>
> See section 5.  Choice quote:
>
> "Overall, 4.4BSD systems tend to require 40 percent fewer disk
>  writes and complete tasks 25 percent more quickly than when using
>  the default 4.4BSD fast filesystem implementation."
>
>
At a cost, including the fact that unlink and other directory operations
are not atomic - eventual consistency is promised.

- M