How to minimize the number of writes to CF card?
kudzu at tenebras.com
Wed Aug 26 21:18:31 UTC 2015
On Wed, Aug 26, 2015 at 1:57 PM, Christian Weisgerber <naddy at mips.inka.de>
> 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.
> 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.
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