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

[Kevin Klues]

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
> >
> >
> >
>
> _______________________________________________
> Tinyos-Storage mailing list
> Tinyos-Storage at millennium.berkeley.edu
> https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-storage
>


-- 
~Kevin