[ug-bosug] Belenix 0.7 can boot from RAM

[Sriram Narayanan]

On Sun, May 4, 2008 at 7:10 PM, Ajey Gore <ajey at thoughtworks.net> wrote:
> Okay this has taken a very wrong turn here.
>
>  I simply meant ­ a practical use of this application where we want to run a
>  production size build and deploy pipeline will require a good amount of RAM.
>  I did not say that minimum requirement is 2 GB.
>
>  Nothing more and nothing less.
>

+1, Ajey. I see your point and agree to it.

Sham, Ajey was referring to a particular use case that I had mentioned
- running Belenix as a Xen based VM instance for use in build and
deployment pipelines - something that we use very often at work (Ajey
and I are colleagues in the same company but different countries).


>
>
>  On 5/4/08 8:58 PM, "sham pavman" <shampavman.cg at gmail.com> wrote:
>
>  > Hi all,
>
> > The aim of this project is to,
>  > Provide boottime option to load cdrom contents into ramdisk or a harddisk
>  > partition. This will speed up subsequent bootup. The Ramdisk module currently
>  > depends on contiguous chunk of physical memory available to do this. This may
>  > not be available early on in Boot. It needs to be investigated whether the
>  > Ramdisk module can be extended to use an array of non-contiguous storage
>  > chunks.
>  >
>  > (flicked from belenix.org <http://belenix.org>  :))
>
>
> >
>  > Regards
>  > Shampavman
>  >
>  > On Mon, May 5, 2008 at 7:24 AM, sham pavman <shampavman.cg at gmail.com> wrote:
>  >> Hi all,
>  >> This is in response to Ajey's queries!!!
>  >> I am not clearing understanding what your trying to say?
>  >> Could you be more specific?
>  >> If your telling that one needs to have atleast 2gb of ram for all this to be
>  >> working then its worng!!
>  >> I did all my testing ,on virtualbox and i had allocated a gb of ram ...
>  >> I did not see any performance hits at all,also if its the case on Virtualbox
>  >> then i guess you could be pretty sure that performace hits are unlikely when
>  >> run on the physical machine itslef!!!!
>  >> Could you be more specific?
>  >>
>  >> Regards
>  >> Shampavman
>  >>
>  >> On Mon, May 5, 2008 at 7:05 AM, Ajey Gore <ajey at thoughtworks.net> wrote:
>  >>> No.. I am not. Basically, What I did not realize that mail did not go
>  >>> throught completely.
>  >>>
>  >>> That means we need 160 GB Ram :-)
>  >>>
>  >>> If we have to run one of the build and deployment environment of live CD.
>  >>>
>  >>> Or if want to do a LOT of stuff on high computing. Then I do not think that
>  >>> you can eventually do everything off normal 2 - 4 GB Ram.
>  >>>
>  >>> It was not a criticism, its kind of realization that whats happening in
>  >>> other world. Google already has almost everything in Ram.
>  >>>
>  >>>
>  >>> On 5/4/08 3:56 PM, "Sriram Narayanan" <sriramnrn at gmail.com> wrote:
>  >>>
>  >>>> What does "That means we need 160 GB Ram :-) " mean ?
>  >>>>
>  >>>> Other folks on this list are like me - we take things literally and
>  >>>> would assume that you have either mis understood or are criticizing
>  >>>> this notion.
>  >>>>
>  >>>> -- Ram
>  >>>>
>  >>>> ---------- Forwarded message ----------
>  >>>> From: Ajey Gore <ajey at thoughtworks.net>
>  >>>> Date: Sun, May 4, 2008 at 1:23 PM
>  >>>> Subject: Re: [ug-bosug] Belenix 0.7 can boot from RAM
>  >>>> To: Bangalore OpenSolaris User Group <ug-bosug at opensolaris.org>,
>  >>>> Moinak Ghosh <moinakg at gmail.com>
>  >>>>
>  >>>>
>  >>>> That means we need 160 GB Ram :-)
>  >>>>
>  >>>>
>  >>>>
>  >>>>
>  >>>>  On 5/4/08 2:11 PM, "Moinak Ghosh" <moinakg at gmail.com> wrote:
>  >>>>
>  >>>>> On Mon, May 5, 2008 at 12:29 AM, Sriram Narayanan
>  >>>> <sriramnrn at gmail.com> wrote:
>  >>>>>> Wow ! :) Now that is a cool thing :)
>  >>>>>>
>  >>>>>>
>  >>>>>>  On Sun, May 4, 2008 at 10:52 AM, Joseph George <Joe.G at sun.com> wrote:
>  >>>>>>> I am not sure everyone on this list understands what this means to
>  >>>>>>>  BeleniX or another OpenSolaris LiveCD.
>  >>>>>>>
>  >>>>>>
>  >>>>>>  I agree.
>  >>>>>>
>  >>>>>>  I can think of three different meanings for "Belenix boots from RAM" :D
>  >>>>>>
>  >>>>>>  Some questions for you:
>  >>>>>>  - Would I now be able to do a PXE boot of Belenix ?
>  >>>>>
>  >>>>>    No. This is a different piece. Loading the compressed image from
>  >>>>>    CDROM to RAM.
>  >>>>>
>  >>>>>>  - Does this mean that I now have a means to remove the LiveCD
>  >>>> after bootup ?
>  >>>>>
>  >>>>>    Yes.
>  >>>>>
>  >>>>>>  - Would this mean that Xen could now boot the OS off RAM ?
>  >>>>>
>  >>>>>    Should be yes.
>  >>>>>
>  >>>>>>                 High speed bootups of VM instances containing Tomcat +
>  >>>>>>  a web app is a common use case in the Build + Virtualization world.
>  >>>>>
>  >>>>>   If you want to do that you are better off using a different method.
>  >>>>> Create
>  >>>>>   a ramdisk using ramdiskadm and boot a VM off that.
>  >>>>>
>  >>>>>   This work essentially gives a slow bootup (5+mins) but blinding fast
>  >>>>>   execution and very fast installation after being booted - since
>  >>>>> everything
>  >>>>>   is running off RAM.
>  >>>>>
>  >>>>> Regards,
>  >>>>> Moinak.
>  >>>>>
>  >>>>>>
>  >>>>>>  It's really great to see new stuff, and I'm looking forward to seeing
>  >>>>>>  your presentation at BOSUG !
>  >>>>>>
>  >>>>>>  -- Sriram
>  >>>>>>
>  >>>>>>
>  >>>>>>
>  >>>>>>
>  >>>>>>>  ~Joe
>  >>>>>>>
>  >>>>>>>
>  >>>>>>>
>  >>>>>>>  On 04-May-08, at 10:32 PM, S h i v wrote:
>  >>>>>>>
>  >>>>>>>> On Sun, May 4, 2008 at 9:55 AM, sham pavman
>  >>>>>>>> <shampavman.cg at gmail.com> wrote:
>  >>>>>>>>> Hi all,
>  >>>>>>>>>
>  >>>>>>>>> Its done now.
>  >>>>>>>>> Belenix 0.7 can now boot from RAM!!!!
>  >>>>>>>>>
>  >>>>>>>>
>  >>>>>>>> Sounds good !
>  >>>>>>>> You should talk about it in the next UG meeting.
>  >>>>>>>>
>  >>>>>>>> -Shiv
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