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Igor Stasenko

File mapping

Many OSes providing file mapping using virtual memory paging.
Is there any plugins in squeak, which allow to use them?

johnmci

Re: File mapping

FFI comes to mind, behaviour of that is very operating system, and
operating system version dependent.
What are you trying to do?

On Jul 20, 2007, at 10:20 AM, sig wrote:

> Many OSes providing file mapping using virtual memory paging.
> Is there any plugins in squeak, which allow to use them?
>

--
========================================================================
===
John M. McIntosh <[hidden email]>
Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com
========================================================================
===

Igor Stasenko

Re: File mapping

Make use of it for Magma DB persistance :)

On 20/07/07, John M McIntosh <[hidden email]> wrote:

> FFI comes to mind, behaviour of that is very operating system, and
> operating system version dependent.
> What are you trying to do?
>
> On Jul 20, 2007, at 10:20 AM, sig wrote:
>
> > Many OSes providing file mapping using virtual memory paging.
> > Is there any plugins in squeak, which allow to use them?
> >
>
> --
> ========================================================================
> ===
> John M. McIntosh <[hidden email]>
> Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com
> ========================================================================
> ===
>
>
>
>

Klaus D. Witzel

Re: File mapping

On Fri, 20 Jul 2007 21:17:12 +0200, sig wrote:

> Make use of it for Magma DB persistance :)

-
http://lists.squeakfoundation.org/pipermail/squeak-dev/2006-December/112204.html

>
> On 20/07/07, John M McIntosh <[hidden email]> wrote:
>> FFI comes to mind, behaviour of that is very operating system, and
>> operating system version dependent.
>> What are you trying to do?
>>
>> On Jul 20, 2007, at 10:20 AM, sig wrote:
>>
>> > Many OSes providing file mapping using virtual memory paging.
>> > Is there any plugins in squeak, which allow to use them?
>> >
>>
>> --
>> ========================================================================
>> ===
>> John M. McIntosh <[hidden email]>
>> Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com
>> ========================================================================
>> ===
>>
>>
>>
>>
>
>

Igor Stasenko

Re: File mapping

First: what this primitive Avi mentioned, where i can look at it?
Second: I don't want to map objects directly to file. I mean i don't
want to use a mapped file as part of VM object memory. I want to keep
it separated and use it for persisting a magma DB.
I'm just thinking about how to improve speed with which Magma can
reify objects and commit them to storage.

On 20/07/07, Klaus D. Witzel <[hidden email]> wrote:

> On Fri, 20 Jul 2007 21:17:12 +0200, sig wrote:
>
> > Make use of it for Magma DB persistance :)
>
> -
> http://lists.squeakfoundation.org/pipermail/squeak-dev/2006-December/112204.html
>
> >
> > On 20/07/07, John M McIntosh <[hidden email]> wrote:
> >> FFI comes to mind, behaviour of that is very operating system, and
> >> operating system version dependent.
> >> What are you trying to do?
> >>
> >> On Jul 20, 2007, at 10:20 AM, sig wrote:
> >>
> >> > Many OSes providing file mapping using virtual memory paging.
> >> > Is there any plugins in squeak, which allow to use them?
> >> >
> >>
> >> --
> >> ========================================================================
> >> ===
> >> John M. McIntosh <[hidden email]>
> >> Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com
> >> ========================================================================
> >> ===
> >>
> >>
> >>
> >>
> >
> >
>
>
>
>
>

Klaus D. Witzel

Re: File mapping

On Sat, 21 Jul 2007 00:25:37 +0200, sig wrote:

> First: what this primitive Avi mentioned, where i can look at it?

Class ImageSegment message category #primitives has users.

> Second: I don't want to map objects directly to file.

lol. Do objects know that you don't want that :)

> I mean i don't
> want to use a mapped file as part of VM object memory.

ImageSegments are loaded/unloaded to/from VM object memory.

> I want to keep
> it separated and use it for persisting a magma DB.

Then External* classes seem to be your choice (John mentioned FFI).

> I'm just thinking about how to improve speed with which Magma can
> reify objects and commit them to storage.
>
> On 20/07/07, Klaus D. Witzel <[hidden email]> wrote:
>> On Fri, 20 Jul 2007 21:17:12 +0200, sig wrote:
>>
>> > Make use of it for Magma DB persistance :)
>>
>> -
>> http://lists.squeakfoundation.org/pipermail/squeak-dev/2006-December/112204.html
>>
>> >
>> > On 20/07/07, John M McIntosh <[hidden email]> wrote:
>> >> FFI comes to mind, behaviour of that is very operating system, and
>> >> operating system version dependent.
>> >> What are you trying to do?
>> >>
>> >> On Jul 20, 2007, at 10:20 AM, sig wrote:
>> >>
>> >> > Many OSes providing file mapping using virtual memory paging.
>> >> > Is there any plugins in squeak, which allow to use them?
>> >> >
>> >>
>> >> --
>> >>
>> ========================================================================
>> >> ===
>> >> John M. McIntosh <[hidden email]>
>> >> Corporate Smalltalk Consulting Ltd.
>> http://www.smalltalkconsulting.com
>> >>
>> ========================================================================
>> >> ===
>> >>
>> >>
>> >>
>> >>
>> >
>> >
>>
>>
>>
>>
>>
>
>

Igor Stasenko

Re: File mapping

On 21/07/07, Klaus D. Witzel <[hidden email]> wrote:
> On Sat, 21 Jul 2007 00:25:37 +0200, sig wrote:
>
> > First: what this primitive Avi mentioned, where i can look at it?
>
> Class ImageSegment message category #primitives has users.
>
> > Second: I don't want to map objects directly to file.
>
> lol. Do objects know that you don't want that :)

If you may know, nobody asks objects about it ;)

>
> > I mean i don't
> > want to use a mapped file as part of VM object memory.
>
> ImageSegments are loaded/unloaded to/from VM object memory.
Yes, magma using same approach, but in more flexible way, rather
simple fileout a graph segment.

>
> > I want to keep
> > it separated and use it for persisting a magma DB.
>
> Then External* classes seem to be your choice (John mentioned FFI).
>
I just wanted to know, if, by chance primitives to use mapped files
already exists. As i see they not. Well, i can write own (interesting,
is Avi still needs them :)