- developers-list - monetdb.org

[Monetdb-developers] Announcement: New Apr2011-SP1 bugfix release
by Fabian Groffen 31 May '11

31 May '11

The MonetDB team at CWI/MonetDB BV is pleased to announce the Apr2011-SP1 bugfix release of the MonetDB suite of programs. At the time of this release, we also officially changed to our new website at http://www.monetdb.org/. This new website is our central source of information, and comes with our new logo and style. For details on this release, please see the release notes at <http://www.monetdb.org/Downloads/ReleaseNotes>.

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[Monetdb-developers] Django adapter for MonetDB 11.3.1
by Marco Quartulli 30 May '11

30 May '11

Dear all, an adapter to the Django web development framework for MonetDB 11.3.1 is available at https://github.com/marcoq/monetdb-python The code is functional and already running an experimental image retrieval site, yet full tests will need to be passed in order to consider inclusion in the Django tree as a proper backend. A merger into the source tree at https://github.com/vikram/monetdb-python has been requested. Marco

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[Monetdb-developers] Qualifying and fixing issues found by the test suite
by Gregory Burd 12 May '11

12 May '11

Hello all, I'm new to MonetDB, but I'm not new to databases or coding. I've been building the Apr2011 branch on my home system, a Fedora release 14 (Laughlin) (8x Intel(R) Xeon(R) CPU X3440 @ 2.53GHz, Memory 8187MB) using clang (clang version 2.8 (branches/release_28) Target: x86_64-redhat-linux-gnu Thread model: posix) and having great success - I am thrilled to be able to work with such an amazing piece of software that has such an elegant and well thought out engineering design and structured methodology (nice work!). Everything builds and runs as expected. However when I run "make check" there are a number of things that catch my eye and I want to know from the experts how you'd like me to help with resolving these potential issues. First, here's how I'm building things: export JAVA_HOME=/usr/java/jdk1.5.0_22 export PATH=${JAVA_HOME}/bin:$PATH export CC=clang ./configure --enable-testing --enable-developer --enable-debug --enable-assert --enable-instrument --enable-merocontrol --enable-strict --enable-warning --enable-dependency-tracking --enable-bits=64 --enable-jdbc --enable-odbc make -k --load-average=90 --jobs=`cat /proc/cpuinfo | grep processor | wc -l` && make check Failures include "major differences" found in the following: tst830.mal in mal vacuum.mal in modules/kernel attach00.mal in modules/mal common.mal in optimizer perl_dbi.MAL.sh in perl/dbi The attach differences I'm seeing don't seem (at first glance) to match those of http://bugs.monetdb.org/show_bug.cgi?id=2751 My general question is, should I report these as bugs? What kind of information from the test run would you like me to add to the bug record? How would I find out if these are already reported (I've tried a few searches already)? I'm happy to dig in and start working on these issues, contributing patches where/when I can. I hope to follow whatever established patterns there are for developing/fixing MonetDB. Also, I see a lot of output like "(attach00.test.err.FILTERED) significantly" and "(pithole.test.out.FILTERED) significantly" what does this mean? Are there tests being skipped? Is there some issue/error that's being filtered out (removing noise so as to better see the signal)? Is there a way to say, run all the tests including those that are expected to fail? Another, semi on-topic, question. I happen to use emacs, has anyone taken the time to write up a .mx mode so that it's a bit easier to develop against the .mx source files? Any debugging hints/tips/tricks hidden on the web anywhere? best, -greg

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[Monetdb-developers] JDBC 4 effort
by Christophe Galerne 01 May '11

01 May '11

Hi, Is there an effort to make the JDBC driver JDBC 4 compliant ? If this is the case, is there a way to participate ? Cdlt, Christophe

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[Monetdb-developers] Announcement: New Apr2011 feature release of MonetDB suite
by Sjoerd Mullender 28 Apr '11

28 Apr '11

The MonetDB team at CWI/MonetDB BV is pleased to announce the Apr2011 feature release of the MonetDB suite of programs. As announced one month ago to the day (March 28, 2011), this release marks the start of a new era: development of MonetDB4 and MonetDB/XQuery has ceased. Development of the Pathfinder compiler continues unabated at the University of Tübingen [1], but there is no longer a link being maintained with MonetDB. For details on this release, please see the release notes at <http://monetdb.cwi.nl/Development/Releases/Apr2011/>. [1] http://www.pathfinder-xquery.org/ -- Sjoerd Mullender

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[Monetdb-developers] Announcement: New Mar2011 feature release of MonetDB suite
by Sjoerd Mullender 28 Mar '11

28 Mar '11

The MonetDB team at CWI/MonetDB BV is pleased to announce the Mar2011 feature release of the MonetDB suite of programs. This release marks the last planned release of MonetDB4 and Pathfinder, and hence the last planned release of MonetDB/XQuery. Development of the Pathfinder compiler continues at the University of Tübingen. The next release, currently planned for April 2011, should be a smooth upgrade from this release, even if MonetDB/XQuery is installed (which will of course then not be upgraded). This release also marks the first release of the new way of building the MonetDB suite. For details on both these issues, and on the other features and bug fixes of this release, please see the release notes at <http://monetdb.cwi.nl/Development/Releases/Mar2011/>. As usual, the download location is <http://dev.monetdb.org/downloads/>. -- Sjoerd Mullender

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[Monetdb-developers] snappy library for BAT compression?
by Roberto Cornacchia 25 Mar '11

25 Mar '11

>From opt_compression.mx: @f opt_compression @- The compressed database Column stores mostly exploit some form of compression to reduce the footprint on disk and to improve disk/memory/cache bandwidth at the expense of cpu/memory cycles. A naive approach is to take a (*preferrably lightweight*) compression algorithm and deploy it against the units of access, e.g. disk/buffers. In MonetDB our granularity is a BAT, which therefore forms the basis for (de)compressed access. I don't know whether this is still an actively developed idea. If it is, perhaps this can help: http://code.google.com/p/snappy/ Roberto

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[Monetdb-developers] New Apr2011 stable branch created
by Sjoerd Mullender 22 Mar '11

22 Mar '11

I have created new stable branches for the next feature release. This branch was created in order to stabilize the code before the feature release. From now on *only* bug fixes may go to this new stable branch. I reserve the right to undo any changes that do not comply with this rule. I also reserve the right to admit changes that are not strictly bug fixes. The name for the branch is Apr2011. So in each of your stable checkout directories you can do hg pull hg update -r to update to this new branch. Note that there is still the Mar2011 branch as well. -- Sjoerd Mullender

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[Monetdb-developers] Search MonetDB Source - character processing at light speed :-)
by Arjen P. de Vries 21 Mar '11

21 Mar '11

Dear MonetDB enthusiasts, Feel free to use the suffix array search demo of the MonetDB source tree where you see fit: http://devel.spinque.com/SearchMonetDBSource/ The index is refreshed every night! You will interactively view all the exact matches of the string you type (with their count); while you type it - like Google Instant, but then per character instead of word. (Nice examples for a first try: allready, is build, != null, ...) For more complex needs, an extended syntax is supported. Here, all individual operands have to be delimited by single quotes. (Infix) operators supported are < and > for before and after, respectively, and ~ for "near". After the second operand, specify the window size in characters. Examples: '#define'<('max','min')30 finds occurrences of #define before either max or min, in a 30 character window. 'if'<'== -1'80~'&&'50 Finds 'if' appearing before '== -1' in an 80 char window, together with '&&' in a char window. We are open to suggestions (send to info(a)spinque.com to reach all of us), and keen to hear about your successful (and even the unsuccessful) uses of the demo. Many greetings, The Spinque team Arjen, Roberto and Wouter -- ==================================================================== CWI, room L333 Centre for Mathematics and Computer Science Science Park 123 Email: Arjen.de.Vries(a)cwi.nl 1098 XG Amsterdam tel: +31-(0)20-5924306 The Netherlands fax: +31-(0)20-5924199 ===================== http://www.cwi.nl/~arjen/ ====================

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[Monetdb-developers] draft message
by Martin Kersten 01 Mar '11

01 Mar '11

Dear MonetDB users and developers, The preparations for the March 2011 release are on target. This release will feature a much simplified installation and compilation process using a unified bootstrap/configure/make/install. Ofcourse, installers and RPMs are also provided. Furthermore, the March 2011 release will be the freeze of the MonetDB XQuery source tree. It will remain downloadable from the website, but no active development or maintenance is foreseen. In April 2011 a MonetDB/SQL feature release will mark the split of the two code bases. From that point onward, we will primarily be concerned with SQL and its enhancements. Saying goodbye to the very old mserver4 code base, also triggered a major code renovation activity. The MonetDB/SQL code base will be cleaned from legacy code, 1-time experimental code, and all that is not strictly needed for the intended functionality. We expect that this cleanup will simplify maintenance in the future. The results of the renovation step will become visible in the fall of 2011. We plan for a smooth transition step for existing SQL environments. However, under the hood, we will change the MAL and kernel library interfaces significantly. To assess the consequences in the community we would like to learn about projects that directly address the MAL or GDK layer. Please send us an email at info(a)monetdb.org with the project highlights. regards, Martin Kersten

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