April 2005 - users-list

[MonetDB-users] RHEL 3 RPMs
by Henk van Lingen 28 Apr '06

28 Apr '06

Hi, Is there a special reason there are no i686 RPM's anymore like there were until 4.6.0_rc2? I think it's a bit weird there are RPM's for the hobby OS 'FedoraCore' but not for the much used server OS 'RedHat Enterprise 3 (and 4)'? The FedoraCore (which Core?) needs libstdc++.so.6 whereas RHEL 3 only has libstdc++.so.5 ... There also seems to be no SRPM's. Cheers, -- Henk van Lingen, Systems & Network Administrator (o- -+ Dept. of Computer Science, Utrecht University.… [View More]

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[MonetDB-users] VOIDs and multiple BATs
by Edmund Dengler 09 May '05

09 May '05

Greetings! Just doing some more digging around MonetDB, and have a couple of questions. (1) If I am managing multiple BATs that are (supposedly) synced, how do I manage appends and the syncing? For example, I have a_p1 = BAT[void, int] and a_p2 = BAT[void, int] (a_p1 = <a> type things with property p1) (a_p2 = <a> type things with property p2) I wish to insert a new <a>=(1,2) thing. Do I do? bat("a_p1").append(1); bat("a_p2").append(2); How do I ensure that the "… [View More]

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[MonetDB-users] Counting open BATs
by Edmund Dengler 05 May '05

05 May '05

Greetings! In the architectural overview, I find the text: "Most memory resource problems in MonetDB are easily avoidable by minimizing your open BAT references (as discussed above) and making your access patterns cache friendly (see the radix module)." Is there anyplace that actually describes when a BAT is considered open? Is it a scope thing (BATs are closed as soon as they are out of scope)? Is a BAT open when I append/update? Does it close when I perform a commit? If not, is there a way … [View More]

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[MonetDB-users] Use of C/C++ prepare statements
by Edmund Dengler 21 Apr '05

21 Apr '05

Greetings! Does anybody have any working example code using mapi_prepare/map_prepare_array/mapi_execute_array showing the use of a prepare along with array substitution? I can get a sample piece working using mapi_execute. Trying mapi_execute_array causes the test program to exit with an error code of 139 (the function does not seem to return, but causes an immediate exit). Using mapi_prepare/mapi_execute_array, the program runs, but nothing is changing in the database. Regards! Ed

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[MonetDB-users] Questions
by Edmund Dengler 21 Apr '05

21 Apr '05

Howdy all! I had posted some questions regarding MonetDB, but have not received feedback on any of them. Is there a more appropriate list I should be posting to? Regards! Ed

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[MonetDB-users] Crashing server
by Edmund Dengler 18 Apr '05

18 Apr '05

Greetings! Having some problems with the MonetDB server crashing. - Start a server - Have a client perform a lot of operations (_lots_ of BATs creation, bun insertions, etc). - Every 10,000 or so operations, perform a <commit();> on the client. Total operations: approximately 7500 BATs, 17,000,000 BUNs. - Do an <ls();> on the server to confirm all tables are clean. - Now perform an <abort();> on the server with every table clean. MonetDB>abort(); #GDKmmap(6553600) … [View More]

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