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

[Vivek Goyal]

On Tue, Mar 29, 2011 at 10:20:57AM -0700, Shyam_Iyer at dell.com wrote:
> 
> 
> > -----Original Message-----
> > From: linux-scsi-owner at vger.kernel.org [mailto:linux-scsi-
> > owner at vger.kernel.org] On Behalf Of Ric Wheeler
> > Sent: Tuesday, March 29, 2011 7:17 AM
> > To: James Bottomley
> > Cc: lsf at lists.linux-foundation.org; linux-fsdevel; linux-
> > scsi at 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.

Is above any different from block IO throttling we have got for block
devices?

> 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.

Above is pretty generic. Do you have specific needs/ideas/concerns?

Thanks
Vivek