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Re: [dm-devel] [Lsf] Preliminary Agenda and Activities for LSF




> -----Original Message-----
> From: linux-scsi-owner vger kernel org [mailto:linux-scsi-
> owner vger kernel org] On Behalf Of Ric Wheeler
> Sent: Tuesday, March 29, 2011 7:17 AM
> To: James Bottomley
> Cc: lsf lists linux-foundation org; linux-fsdevel; linux-
> scsi vger kernel org; device-mapper development
> Subject: Re: [Lsf] Preliminary Agenda and Activities for LSF
> 
> On 03/29/2011 12:36 AM, James Bottomley wrote:
> > Hi All,
> >
> > Since LSF is less than a week away, the programme committee put
> together
> > a just in time preliminary agenda for LSF.  As you can see there is
> > still plenty of empty space, which you can make suggestions (to this
> > list with appropriate general list cc's) for filling:
> >
> >
> https://spreadsheets.google.com/pub?hl=en&hl=en&key=0AiQMl7GcVa7OdFdNQz
> M5UDRXUnVEbHlYVmZUVHQ2amc&output=html
> >
> > If you don't make suggestions, the programme committee will feel
> > empowered to make arbitrary assignments based on your topic and
> attendee
> > email requests ...
> >
> > We're still not quite sure what rooms we will have at the Kabuki, but
> > we'll add them to the spreadsheet when we know (they should be close
> to
> > each other).
> >
> > The spreadsheet above also gives contact information for all the
> > attendees and the programme committee.
> >
> > Yours,
> >
> > James Bottomley
> > on behalf of LSF/MM Programme Committee
> >
> 
> Here are a few topic ideas:
> 
> (1)  The first topic that might span IO & FS tracks (or just pull in
> device
> mapper people to an FS track) could be adding new commands that would
> allow
> users to grow/shrink/etc file systems in a generic way.  The thought I
> had was
> that we have a reasonable model that we could reuse for these new
> commands like
> mount and mount.fs or fsck and fsck.fs. With btrfs coming down the
> road, it
> could be nice to identify exactly what common operations users want to
> do and
> agree on how to implement them. Alasdair pointed out in the upstream
> thread that
> we had a prototype here in fsadm.
> 
> (2) Very high speed, low latency SSD devices and testing. Have we
> settled on the
> need for these devices to all have block level drivers? For S-ATA or
> SAS
> devices, are there known performance issues that require enhancements
> in
> somewhere in the stack?
> 
> (3) The union mount versus overlayfs debate - pros and cons. What each
> do well,
> what needs doing. Do we want/need both upstream? (Maybe this can get 10
> minutes
> in Al's VFS session?)
> 
> Thanks!
> 
> Ric

A few others that I think may span across I/O, Block fs..layers.

1) Dm-thinp target vs File system thin profile vs block map based thin/trim profile. Facilitate I/O throttling for thin/trimmable storage. Online and Offline profil.
2) Interfaces for SCSI, Ethernet/*transport configuration parameters floating around in sysfs, procfs. Architecting guidelines for accepting patches for hybrid devices.
3) DM snapshot vs FS snapshots vs H/W snapshots. There is room for all and they have to help each other
4) B/W control - VM->DM->Block->Ethernet->Switch->Storage. Pick your subsystem and there are many non-cooperating B/W control constructs in each subsystem.

-Shyam


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