[Tinyos-Storage WG] Re: Meeting minutes 05/04

[Junzhao Du]

Sorry guys, missed the email, and thought all of you are TTX. will
dial in next week.

junzhao

On 5/5/07, Kevin Klues <klueska at gmail.com> wrote:
> Sorry guys.  I had a conflict today.  I wlll be there next week.
>
> Kevin
>
> On 5/4/07, Prabal Dutta <prabal at cs.berkeley.edu> wrote:
> > Participants: Gaurav Mathus, David Moss, Deepak Ganesan, Prabal Dutta
> >
> > On 5/4/07, Gaurav Mathur <gmathur at cs.umass.edu> wrote:
> > > 05/04
> > >
> > > * Working group policies
> > > ** For joining significant experience building a storage system is
> > > required, and joining 4-6 consecutive meetings
> > > ** If member misses 4-6 consecutive meetings, they are pinged to see if
> > > they want to continue.
> > >
> > > * For NAND flash, writing data sequentially within an erase block
> > > ** NOR flash states that over-writes should not be done, but in practice
> > > this works
> > > ** Not sure if this is a hard/soft constraint for NAND flashes.
> > > ** Should not enforce the softer constraints – user should be aware of
> > > the quirks. Best practice and core implementations _should_ not use any
> > > of the quirks
> > > ** Is this a performance constraint or a data reliability constraint ?
> > > ** How should this be exposed to the application ?
> > >
> > > * JEDEC
> > > ** Should FlashSettings interface query the flash dynamically ?
> > > ** Probably more useful for MMC/SD cards since they can be swapped at
> > > run-time
> > >
> > > * Multiple sector sizes
> > > ** Example: If flash supports 1 and 4 pages as erase units, then as an
> > > optimization a 4 page volume could use a single 4 page erase operation
> > > to erase the volume at one shot.
> > > ** Should the Flashsettings interface expose multiple flash sector sizes ?
> > > ** If so, how ?
> > >
> > > * Add Best/Worst Practices section to TEPS
> > > ** sequential vs non-sequential writes
> > > ** overwrites to same location on NOR/NAND flash
> > > ** Number of writes to a page
> > >
> > > * Plan for next week
> > > ** Add capsule objects to TEP 129
> > > ** Prabal to take a crack at TEP 128
> > > ** Checkpointing and Rollback support should be in a separate TEP
> > > ** Take a look at the hardness/softness of the different constraints
> > > discussed
> > >
> > >
> > >
> >
> > _______________________________________________
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> > Tinyos-Storage at millennium.berkeley.edu
> > https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-storage
> >
>
>
> --
> ~Kevin
>
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