|
|
Re: Persistence, UI, etc.: msg#00075
|
Subject: |
Re: Persistence, UI, etc. |
On Friday 11 March 2005 16:47, you wrote:
> Marcus Sundman wrote:
> > Nope, EROS also use a single level store, like UUU.
> > E.g.: http://www.eros-os.org/papers/storedesign2002.pdf
>
> Then their talk about taking checkpoints of the memory is then basically
> qualified nonsense.
No. Even if RAM is just a cache of the disk changes to the RAM still needs
to be flushed to disk every once in a while if you want them to persist.
Instead of flushing a dirty page in memory to its correct location on the
disk (which would cause a lot of disk head movement and thus take a lot of
time) all dirty pages can be written to one continuous area on the disk and
then when there is more time the correct pages on the disk can be updated.
- Marcus Sundman
|
| |
