Hello all,
Any success or horror stories with OmniBase and/or Magma? Can you report that either worked well at or got into trouble beyond any particular size (either in object count or bytes of data)? Other comments?
Bill
Wilhelm K. Schwab, Ph.D. University of Florida Department of Anesthesiology PO Box 100254 Gainesville, FL 32610-0254
Email: bschwab@anest.ufl.edu Tel: (352) 846-1285 FAX: (352) 392-7029
Hi Bill,
AFAIK you can't use omnibase in multiuser in linux. I saw in squeak source a package OSProcess.filelockcache from Avi may be is to make it able to?
I'm trying Magma and is fine by now. I'll add something I made to make it able to maintain indexes automatically that I used to use with OmniBase.
cheers,
Sebastian Sastre
-----Mensaje original----- De: squeak-dev-bounces@lists.squeakfoundation.org [mailto:squeak-dev-bounces@lists.squeakfoundation.org] En nombre de Bill Schwab Enviado el: Jueves, 28 de Febrero de 2008 20:33 Para: squeak-dev@lists.squeakfoundation.org Asunto: [squeak-dev] OmniBase/Magma - how big??
Hello all,
Any success or horror stories with OmniBase and/or Magma? Can you report that either worked well at or got into trouble beyond any particular size (either in object count or bytes of data)? Other comments?
Bill
Wilhelm K. Schwab, Ph.D. University of Florida Department of Anesthesiology PO Box 100254 Gainesville, FL 32610-0254
Email: bschwab@anest.ufl.edu Tel: (352) 846-1285 FAX: (352) 392-7029
Hi!
(ccing Magma list)
"Bill Schwab" BSchwab@anest.ufl.edu wrote:
Hello all,
Any success or horror stories with OmniBase and/or Magma? Can you report that either worked well at or got into trouble beyond any particular size (either in object count or bytes of data)? Other comments?
Bill
From the Gjallar project we can report that Magma works really nice. We
have had perhaps 2-3 buglets and Chris fixed them all quickly and promptly. IIRC they were related mainly to the query stuff which Chris pushed out fast because of our popular demand - so he was definitely not to blame. :)
Generally I would say that the only "issue" we had was slow(ish) read performance. So if you write an "interactive" application with Magma you need to take two things into account:
1. Since Magma is an ODB it builds a cache of objects into your session. So when/if the session is cold you get punished with load times. But when it is hot they are zero. Essentially what this means in Gjallar is that when a user logs in things will take a bit of time the first time she does something. But from then on things go much faster and since a Gjallar user typically is logged in for a long time - typically all day - it works fine.
2. Even with a warm session (with lots of cached objects) you can still get punished with longish load times. This can be remedied a LOT with setting up good read strategies.
IMHO I think Magma would SHINE if we somehow could boost the serialization/deserialization mechanism in it. Because I suspect this is where the bottleneck is regarding the above. An Exuperified Magma could be the answer - or some other HARD approach - I dunno. Chris?
regards, Göran
IMHO I think Magma would SHINE if we somehow could boost the serialization/deserialization mechanism in it. Because I suspect this is where the bottleneck is regarding the above. An Exuperified Magma could be the answer - or some other HARD approach - I dunno. Chris?
Magma users will appreciate the new r41Beta1 just posted Wednesday. Profiling had shown Magma spending quite a bit of time in IdentityDictionary's, largely for oid lookups. I'm still benchmarking, but with Igors new IdentityDictionary replacements I am seeing tremendous gains across the board, for both reads and commits.
I'm also excited for single-clause Readers now improved #size and #at: by a factor of 100x.. again! They're so fast now, as a joke, I demonstrated a scrolling list with more than two-hundred thousand objects (two million would work as well) The list widget only needs its underlying domain to understand #size and #at:, so the Reader plugs-in seamlessly. Scrolling performance is good, even with remote connections.
Great new Crhis. Great news
thanks for that
Sebastian Sastre
-----Mensaje original----- De: squeak-dev-bounces@lists.squeakfoundation.org [mailto:squeak-dev-bounces@lists.squeakfoundation.org] En nombre de Chris Muller Enviado el: Sábado, 01 de Marzo de 2008 01:58 Para: The general-purpose Squeak developers list CC: magma@lists.squeakfoundation.org Asunto: Re: [squeak-dev] OmniBase/Magma - how big??
IMHO I think Magma would SHINE if we somehow could boost the serialization/deserialization mechanism in it. Because I
suspect this is
where the bottleneck is regarding the above. An
Exuperified Magma could
be the answer - or some other HARD approach - I dunno. Chris?
Magma users will appreciate the new r41Beta1 just posted Wednesday. Profiling had shown Magma spending quite a bit of time in IdentityDictionary's, largely for oid lookups. I'm still benchmarking, but with Igors new IdentityDictionary replacements I am seeing tremendous gains across the board, for both reads and commits.
I'm also excited for single-clause Readers now improved #size and #at: by a factor of 100x.. again! They're so fast now, as a joke, I demonstrated a scrolling list with more than two-hundred thousand objects (two million would work as well) The list widget only needs its underlying domain to understand #size and #at:, so the Reader plugs-in seamlessly. Scrolling performance is good, even with remote connections.
Hi, my name is gildas, i'm a student in 4th year in IT Management and i would like to use Magma for my project of implementation of an accounting software in squeak... The problem is that i'm used to use sql for the databases and i'm a little bit lost with Magma, i would like to know if there is any tutorial for magma which can explain how to create a server, how to create data and how to read it...
Sorry i'm really a begginer, but i really want to use magma which seems to be really integrated to squeak instead of an sql database.
Thank you, regards,
Gildas. _________________________________________________________________ Votre contact a choisi Hotmail, l'e-mail nouvelle génération. Créez un compte. http://www.windowslive.fr/hotmail/default.asp
Gildas,
Magma isn't too difficult to get going. The main swiki page is located here:
http://wiki.squeak.org/squeak/2665
And you may want to start with 'Getting Started with Magma':
http://wiki.squeak.org/squeak/2689
I've not seen any full tutorials for Magma, but maybe someone else has.
Magma is well factored and I would recommend browsing the categories for the server and client api. Main classes of interest will be;
MagmaRepositoryController MagmaSession MaReadStrategy MagmaCollectionReader
I hope this helps as a start,
Travis
Travis
On Sat, 2008-03-01 at 17:00 +0100, Gildas Le Mentec wrote:
Hi, my name is gildas, i'm a student in 4th year in IT Management and i would like to use Magma for my project of implementation of an accounting software in squeak... The problem is that i'm used to use sql for the databases and i'm a little bit lost with Magma, i would like to know if there is any tutorial for magma which can explain how to create a server, how to create data and how to read it...
Sorry i'm really a begginer, but i really want to use magma which seems to be really integrated to squeak instead of an sql database.
Thank you, regards,
Gildas. _________________________________________________________________ Votre contact a choisi Hotmail, l'e-mail nouvelle génération. Créez un compte. http://www.windowslive.fr/hotmail/default.asp
Also you will find some guidelines on the context of using with Seaside, on the tutorial:
http://www.swa.hpi.uni-potsdam.de/seaside/tutorial (See Chapter 8 - Persistence).
hth. gsa.
2008/3/2, Travis Kay tlk@nb.sympatico.ca:
Gildas,
Magma isn't too difficult to get going. The main swiki page is located here:
http://wiki.squeak.org/squeak/2665
And you may want to start with 'Getting Started with Magma':
http://wiki.squeak.org/squeak/2689
I've not seen any full tutorials for Magma, but maybe someone else has.
Magma is well factored and I would recommend browsing the categories for the server and client api. Main classes of interest will be;
MagmaRepositoryController MagmaSession MaReadStrategy MagmaCollectionReader
I hope this helps as a start,
Travis
Travis
On Sat, 2008-03-01 at 17:00 +0100, Gildas Le Mentec wrote:
Hi, my name is gildas, i'm a student in 4th year in IT Management and i would like to use Magma for my project of implementation of an accounting software in squeak... The problem is that i'm used to use sql for the databases and i'm a little bit lost with Magma, i would like to know if there is any tutorial for magma which can explain how to create a server, how to create data and how to read it...
Sorry i'm really a begginer, but i really want to use magma which seems to be really integrated to squeak instead of an sql database.
Thank you, regards,
Gildas. _________________________________________________________________ Votre contact a choisi Hotmail, l'e-mail nouvelle génération. Créez un compte. http://www.windowslive.fr/hotmail/default.asp
On Sun, Mar 2, 2008 at 5:00 AM, Gildas Le Mentec zihildaah@hotmail.com wrote:
Hi, my name is gildas, i'm a student in 4th year in IT Management and i would like to use Magma for my project of implementation of an accounting software in squeak... The problem is that i'm used to use sql for the databases and i'm a little bit lost with Magma, i would like to know if there is any tutorial for magma which can explain how to create a server, how to create data and how to read it...
Sorry i'm really a begginer, but i really want to use magma which seems to be really integrated to squeak instead of an sql database.
Hi Gildas.
Welcome to the community! I assume Travis's answer is suffiencient.
There's a special mailing list for beginners where people such as yourself can get advice on Squeak. The details for joining are at http://www.squeak.org/Community.
Gulik.
Newbie question, but posted where? I can't find it in Monticello or on squeaksource. ...Stan
Chris Muller-3 wrote:
Magma users will appreciate the new r41Beta1 just posted Wednesday.
I hope this helps.
http://lists.squeakfoundation.org/pipermail/magma/2008-March/001030.html
Cheers.
On Wed, 2 Apr 2008 05:35:36 -0700 (PDT) stan shepherd squeak414@free.fr wrote:
Newbie question, but posted where? I can't find it in Monticello or on squeaksource. ...Stan
Chris Muller-3 wrote:
Magma users will appreciate the new r41Beta1 just posted Wednesday.
-- View this message in context: http://www.nabble.com/-squeak-dev--OmniBase-Magma---how-big---tp15748712p164... Sent from the Squeak - Dev mailing list archive at Nabble.com.
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Bill Schwab -
Chris Muller -
Germán Arduino -
Gildas Le Mentec -
Giuseppe Luigi Punzi -
goran＠krampe.se -
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Sebastian Sastre -
stan shepherd -
Travis Kay