Magma June 2006

magma@lists.squeakfoundation.org

7 participants
9 discussions

Magma Seaside Integration
by Martin Schubert 08 Jul '06

08 Jul '06

hey out there, does anybody know to which version of seaside (i am using the 2.6b1 branch and i get WARenderCanvas failure after following the configure link) the sushi store example : seasideSushiStoreWithMagma.cs.gz is working? best regards martin

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upgrade5To6:
by Chris Muller 15 Jun '06

15 Jun '06

I just posted an update to client and server with a method to upgrade legacy repositories. Use this utility method to update an existing repository version, generate all the needed -keys indexes and rename the existing ones to -oids. After that, they should be all ready to query. Barely tested, only do it on a backup. - Chris

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[ANN] Queries preview on SqueakSource
by Chris Muller 14 Jun '06

14 Jun '06

I have posted an early beta of the queries functionality on SqueakSource, along with some preliminary documentation on the Swiki: http://minnow.cc.gatech.edu/squeak/5859 It is only lightly tested, but has been carefully constructed so I do expect most parts to work pretty well. To load the code, just look for the individual packages dated this week and load them on top of a MagmaServerLoader (or MagmaTesterLoader, of course). I'm real pleased with how the implementation has shaped up. In particular, for standard queries, we have maintained complete "lazy" determination of the query result. Only when a page is requested does calculation on the query "resume" only for the page requested. When a query can be optimized down to one clause, sorting by the attribute of that clause is provided for "free" and #sortBy: will return the receiver instantly. If sorting is needed on a different attribute or on a complex query that could not be reduced to one clause, then Magma is required to perform a full enumeration of the result. In this case, a new MagmaCollection is with an index on the sort attribute and a reader on that index is returned from #sortBy:. This occurs in the background, allowing "results as you go" and with #fractionSorted providing the progress indication. Non-persistent object integration should be working! Some of the ugliest code in Magma related to the old way of integrated non-persistent objects has, thankfully, been deleted. Talk about addition by subtraction! It has been replaced by much cleaner and easier to understand code. Performance seems reasonably good from my initlal tests. There is still no provision for ommitting duplicates; if an object qualifies under two clauses it will be included twice in the result set. I appreciate any advice about this. I have not tested #descending sorting yet. It should work with legacy database files, I haven't tried. ==== I am leaving for an extended holiday beginning Friday evening, 6/16 to 6/26 and will be offline the entire time. I was hoping to have this work completely finished by now, but I will have to finish the test cases and other refinements after I get back. In the meantime, should you have time to try it out I, of course, appreciate your feedback. Enjoy! Chris

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Re: Magma Seaside Integration
by Chris Muller 14 Jun '06

14 Jun '06

Hi Martin, the Seaside site says that is based on a "stripped 3.7" image. Brent built the tutorial on a 3.8full image, so there are probably some issues trying to use that 3.7stripped. I know its a lot of loading, but would you mind using a 3.8 image with Seaside 2.5 or 2.6 to view the tutorial? I have not tried the tutorial recently but it is quite worthwhile. I can probably help with that image if necessary and I know there are thankfully at least a few Seaside masters here to help too should you run into any issues. Thanks.. ----- Original Message ---- From: Martin Schubert <mtin79(a)googlemail.com> To: magma(a)lists.squeakfoundation.org; The Squeak Enterprise Aubergines Server - general discussion. <seaside(a)lists.squeakfoundation.org> Sent: Wednesday, June 7, 2006 3:23:51 PM Subject: Magma Seaside Integration hey out there, does anybody know to which version of seaside (i am using the 2.6b1 branch and i get WARenderCanvas failure after following the configure link) the sushi store example : seasideSushiStoreWithMagma.cs.gz is working? best regards martin _______________________________________________ Magma mailing list Magma(a)lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/magma

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Re: Can`t find Magma Dependency : Magma client-cmm.181
by Chris Muller 08 Jun '06

08 Jun '06

This is fixed. Please let me know if you have questions or other issues. thanks! ----- Original Message ---- From: Martin Schubert <mtin79(a)googlemail.com> To: magma(a)lists.squeakfoundation.org Sent: Wednesday, June 7, 2006 7:23:08 AM Subject: Can`t find Magma Dependency : Magma client-cmm.181 hey out there, i recently had a problem to load the MagmaTesterLoader-cmm.22 package from the monticello rep. because of the following problem : Can`t find Magma Dependency : Magma client-cmm.181 shall i just ignore it ? best martin _______________________________________________ Magma mailing list Magma(a)lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/magma

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query update
by Chris Muller 07 Jun '06

07 Jun '06

Work on the new query function is coming along well; I've been testing with a relatively small 13K MagmaCollection with four indices and performance seems real good given reasonable query's. I'm really glad to have been prodded into getting this work done as it will prove extremely useful. I plan post something in the coming days. - Chris

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Float indexes
by Chris Muller 07 Jun '06

07 Jun '06

While working on the new query stuff I noticed that Float ranges spanning 0.0 won't work properly. That is, the hash values calculated for negative floats (from #asIEEE32BitWord) are greater than those for positive numbers. -3.0 asIEEE32BitWord < 3.0 asIEEE32BitWord "false" Probably no one is using it anyway but I thought it worth mentioning. Apparently there are also some Mantis bugs open on these methods too. http://bugs.impara.de/view.php?id=3133

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Can`t find Magma Dependency : Magma client-cmm.181
by Martin Schubert 07 Jun '06

07 Jun '06

hey out there, i recently had a problem to load the MagmaTesterLoader-cmm.22 package from the monticello rep. because of the following problem : Can`t find Magma Dependency : Magma client-cmm.181 shall i just ignore it ? best martin

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[ANN] The Magma File Format
by Brent Pinkney 05 Jun '06

05 Jun '06

Hi, For this interested in OODBs and Magma in particular, I have posted a PDF document describing the Magma file format to the Swiki. See http://minnow.cc.gatech.edu/squeak/2665 Thanks Brent

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Magma June 2006