- users-list - monetdb.org

Choices of operating system
by Radovan Bičiště 12 Feb '14

12 Feb '14

Hello, We have monetdb deployed for our customers and due to decent experience we would like to solidify and standardize our enviroment. So far we've been using UBUNTU 12.04. I would like to ask for recommendation over operating system with good mix performance/support period. Internally we use Oracle Linux, but lack of prebuild packages pushed us to consider different distribution. We are looking at these options ordered by our priority: 1. Fedora, I have doubts about long term support. Is this what is used for Monet development? 2. FreeBSD, AFAIK it has different memory management and should scale better. Thank you, Radovan

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database crash
by Radovan Bičiště 11 Feb '14

11 Feb '14

Hello, I hope anyone can help with database crash. In .gdk_lock is following: USR=1001 PID=6751 TIME=Mon Feb 10 16:04:17 2014 @ LOGON USR=1001 PID=6751 TIME=Mon Feb 10 16:04:18 2014 @ !FATAL: logger_new: there is a logger catalog, but no log file. Are you sure you are using the correct combination of database (--dbpath) and log directory (--set sql_logdir)? If you have done a recent update of the server, it may be that your logs are in an old location. You should then either use --set sql_logdir=<path to old log directory> or move the old log directory to the new location (/u01/ceosdata/database/monetdb/drmax/crm/zkdev1/sql_logs/sql/). USR=1001 PID=6751 TIME=Mon Feb 10 16:04:18 2014 @ LOGOFF Anyway to start the database without logs ? Thanks, Radovan

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Announcement: (Hopefully) Final Release Candidate for Jan2014 Release
by Sjoerd Mullender 10 Feb '14

10 Feb '14

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 The MonetDB team at CWI/MonetDB BV is pleased to announce a new release candidate for the upcoming Jan2014 feature release. Many things have changed in this release compared to the previous (Feb2013) release (that's why it took so long). For a smooth upgrade I would urge you to try out this release candidate and to provide feedback on our bug tracker (http://bugs.monetdb.org) A number of bugs in the previous release candidate have been fixed. We hope that this release candidate is good enough to be the new release, but we will give it a few more days. The release candidate can be found at http://dev.monetdb.org/downloads/testing. - -- Sjoerd Mullender -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQCVAwUBUviUtz7g04AjvIQpAQJy5wQArulRMgV7YWX1NoOJMoSSKINjEQLeneZC vj4NqMJ0igxYMRxqBLd7EcSfLKvgDR3ElmP7HhDkXbmCDk6POD4PjxPRmh66AEwY uYBhT3iIEe01PFzqjMhWm2HnDnfDOTzvn8Ai4n1/qCIVmW0p14kIYOkTRXWiNX5o tcGfy384cx8= =2un1 -----END PGP SIGNATURE-----

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Some questions regarding MonetDB
by Alejandro Villamarin 07 Feb '14

07 Feb '14

Hi everyone, I've got some questions regarding MonetDB and scientifc data...more precisely, I'd like to know if MonetDB is suitable for ETL on datasets coming from NOAA in the following formats: GRIB2, NetCDF and HDF5, which all are multdimensional value grid files (to put it simple). I've already installed MonetDB and played with the tutorial, but so far I looks like a traditional RDBMS to me (yet)...any insights in this direction? Should I deep dive into the reference Manual? Another question would be...could I directly insert the data or do I have to do any parsing before? Does MonetDB provide analytical tools to do, for instance, correlation on that type of datasets? Thanks in advance, Alejandro

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Fwd: Error when running Monet as cron jobs
by Nitin Gautam 07 Feb '14

07 Feb '14

Hi I am parsing my logs hourly as part of cron jobs and then uploading the data to Monet. However sometimes I do see some error messages in the logs *unsupported hash algorithms: gorithms: gorit* *monetdbd: internal error while starting mserver, please refer to the logs* Not sure what these error messages are, are they because of a bug or limitation of the Monet DB. Regards Nitin

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mserver5 parameters from monetdbd
by Javier Picorel 06 Feb '14

06 Feb '14

Hello, I want to profile the data that is being read or created (e.g., tables, intermediate results) during the execution of a query. I would like to have more info than the tomograph or stethoscope show. I'm thinking about using the gdk_debug parameter (ALLOCMASK and HEAPMASK). However, I cannot specify the parameters of mserver5 when I run monetdbd. Running mserver5 manually doesn't seem to work. How can I specify the mserver5 parameter when starting the farm through monetdbd? Thanks! Regards, Javier

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MonetDB Next Release Feature Wishlist
by Martin Kersten 04 Feb '14

04 Feb '14

LS, A major MonetDB feature release is pending, called Jan2014. To plan our (always scarce) resources, we would like to learn from the community in what areas the functionality or performance should be further improved. Please drop us an email on info(a)monetdb.org to share your thoughts. And, please, enlighten us on how you use the product, or modify/deploy/expand it to better suite your environment. regards, Martin Kersten

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Re: problem with Jan2014 build
by Ying Zhang 29 Jan '14

29 Jan '14

Hai Bas, We hebben vandaag een probleem met substring gefixed die waarschijnlijk met jou probleem te maken heeft. Zou je misschien willen kijken of die fix iets voor je doet? We kunnen dat helaas zelf niet testen. Mvg, Jennie On Jan 27, 2014, at 15:02, Ying Zhang <ying.zhang(a)monetdb.com> wrote: > Hai Bas, > > Thanks again for the information. I was hoping that with some luck your problems might be gone in RC2 due to various fixes, unfortunately they are not. I'd like to look more deeply into the problems you have reported. Problems like not effective updates are rather show stoppers. > > Would you please provide me the ASC files with which the problems can be reproduced? You can send the files directly to me if necessary. Thanks! > > Regards, > > Jennie > > On Jan 27, 2014, at 13:05, Bas Kaptijn <b.kaptijn(a)chs.nl> wrote: > >> Tested with Jan 2014 RC2. All mentioned problems still occur with this release. >> >> Also, with the no_mitosis_pipe my program has problems with DELETE’s and possibly other queries >> not taking place effectively somehow. For me the investigation of the Jan2014 build stops here >> until some of the problems mentioned here are fixed >> >> Regards, Bas >> >> Van: Bas Kaptijn >> Verzonden: dinsdag 21 januari 2014 12:55 >> Aan: 'users-list(a)monetdb.org' >> Onderwerp: RE: problem with Jan2014 build >> >> Some last info: the problem disappears when using the no_mitosis_pipe optimizer pipeline. >> >> sql>set optimizer='no_mitosis_pipe'; >> operation successful (0.139ms) >> sql>SELECT * FROM source1 WHERE SUBSTRING(SOURCE,1,2)='04' LIMIT 1 OFFSET 400000; >> +-----------------------------------------------------------------------------+--------+----------------------------------------------------------------------------------------------------------------------------------------------------+ >> | file | line | source | >> +=============================================================================+========+====================================================================================================================================================+ >> | /home/bkaptijn/DDDB/.tmpinputdir/9772_9999_20130501_20130531_Schade_516.ASC | 430664 | 04999999999999999999999999999999999999999 >> : >> +-----------------------------------------------------------------------------+--------+----------------------------------------------------------------------------------------------------------------------------------------------------+ >> 1 tuple (1.1s) >> sql>set optimizer='default_pipe'; >> operation successful (0.305ms) >> sql>SELECT * FROM source1 WHERE SUBSTRING(SOURCE,1,2)='04' LIMIT 1 OFFSET 400000; >> +------+------+--------+ >> | file | line | source | >> +======+======+========+ >> +------+------+--------+ >> 0 tuples (798.870ms) >> >> Regards, Bas >> _______________________________________________ >> users-list mailing list >> users-list(a)monetdb.org >> https://www.monetdb.org/mailman/listinfo/users-list >

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Dynamic queries
by imad hajj chahine 28 Jan '14

28 Jan '14

Hi, What is the recommended way to work with dynamic queries, any optimization techniques, is there a way to avoid them using functions written in MAL.

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Bug when using BAT UDFs with grouped aggregates and mitosis (related to 3396)
by Alastair McKinley 27 Jan '14

27 Jan '14

Dear all, I have been trying to integrate a BAT UDF to test the performance of MonetDB for a particular query. I am currently testing on Ubuntu 13.04 with MonetDB 11.15.19. My BAT UDF works in some cases and in others fails with the error message "b and g must be aligned" in gdk_aggr.c:89. Using gdb I can see that the BATcount() function returns different values for the length of b and g. For a minimal test case, I created a very simple BAT UDF that just multiples two doubles together in the input bats. I believe this is related to bug 3396 as passing --forcemito to mserver triggers the bug. If only the scalar version of the UDF is defined the query works correctly in all cases. Below I have included my test sql and the query plans of the working and non-working usages. I hope this enough to help track this down. Best regards, Alastair // SQL create table tab1 (group_by_col int, index_col int, f float); create table tab2 (index_col int, f float); insert into tab1 values (1,1,0.1),(1,2,0.2),(2,1,0.3),(2,2,0.4),(3,1,0.5),(3,2,0.6); insert into tab2 values (1,0.1),(2,0.2); select tab1.group_by_col,SUM(udf_multiply_dbl(tab1.f,tab2.f)) from tab2 inner join tab1 on tab1.index_col = tab2.index_col group by tab1.group_by_col; drop table tab1; drop table tab2; // Working MAL +-------------------------------------------------------------------------+ | mal | +=========================================================================+ | function user.s2_1{autoCommit=true}():void; | | X_36 := nil:bat[:oid,:int]; | | X_57:bat[:oid,:dbl] := nil:bat[:oid,:dbl]; | | barrier X_86 := language.dataflow(); | | X_2 := sql.mvc(); | | X_3:bat[:oid,:oid] := sql.tid(X_2,"sys","tab1"); | | X_6 := sql.bind(X_2,"sys","tab1","index_col",0); | | (X_9,r1_9) := sql.bind(X_2,"sys","tab1","index_col",2); | | X_12 := sql.bind(X_2,"sys","tab1","index_col",1); | | X_14 := sql.delta(X_6,X_9,r1_9,X_12); | | X_15 := algebra.leftfetchjoin(X_3,X_14); | | X_16:bat[:oid,:oid] := sql.tid(X_2,"sys","tab2"); | | X_18 := sql.bind(X_2,"sys","tab2","index_col",0); | | (X_19,r1_19) := sql.bind(X_2,"sys","tab2","index_col",2); | | X_21 := sql.bind(X_2,"sys","tab2","index_col",1); | | X_22 := sql.delta(X_18,X_19,r1_19,X_21); | | X_23 := algebra.leftfetchjoin(X_16,X_22); | | (X_24,r1_24) := algebra.join(X_15,X_23); | | X_85 := algebra.leftfetchjoin(X_24,X_3); | | X_26 := sql.bind(X_2,"sys","tab1","group_by_col",0); | | (X_28,r1_28) := sql.bind(X_2,"sys","tab1","group_by_col",2); | | X_30 := sql.bind(X_2,"sys","tab1","group_by_col",1); | | X_31 := sql.delta(X_26,X_28,r1_28,X_30); | | X_32:bat[:oid,:int] := algebra.leftfetchjoin(X_85,X_31); | | (X_33,r1_34,r2_34) := group.subgroupdone(X_32); | | X_36 := algebra.leftfetchjoin(r1_34,X_32); | | X_37 := sql.bind(X_2,"sys","tab1","f",0); | | (X_42,r1_43) := sql.bind(X_2,"sys","tab1","f",2); | | X_45 := sql.bind(X_2,"sys","tab1","f",1); | | X_47 := sql.delta(X_37,X_42,r1_43,X_45); | | X_48:bat[:oid,:dbl] := algebra.leftfetchjoin(X_85,X_47); | | X_49 := sql.bind(X_2,"sys","tab2","f",0); | | (X_51,r1_53) := sql.bind(X_2,"sys","tab2","f",2); | | X_53 := sql.bind(X_2,"sys","tab2","f",1); | | X_54 := sql.delta(X_49,X_51,r1_53,X_53); | | X_55:bat[:oid,:dbl] := algebra.leftfetchjoinPath(r1_24,X_16,X_54); | | X_56:bat[:oid,:dbl] := batudf.udf_multiply_dbl(X_48,X_55); | | X_57:bat[:oid,:dbl] := aggr.subsum(X_56,X_33,r1_34,true,true); | | language.pass(X_3); | | language.pass(X_32); | | language.pass(X_85); | | language.pass(X_16); | | language.pass(r1_34); | | exit X_86; | | X_59 := sql.resultSet(2,1,X_36); | | sql.rsColumn(X_59,"sys.tab1","group_by_col","int",32,0,X_36); | | sql.rsColumn(X_59,"sys.L1","L1","double",53,0,X_57); | | X_71 := io.stdout(); | | sql.exportResult(X_71,X_59); | | end s2_1; | +-------------------------------------------------------------------------+ // Non working MAL with --forcemito +-------------------------------------------------------------------------------------------------------+ | mal | +=======================================================================================================+ | function user.s2_1{autoCommit=true}():void; | | X_23 := nil:bat[:oid,:int]; | | X_41:bat[:oid,:dbl] := nil:bat[:oid,:dbl]; | | barrier X_196 := language.dataflow(); | | X_2 := sql.mvc(); | | X_70:bat[:oid,:oid] := sql.tid(X_2,"sys","tab1",0,4); | | X_78:bat[:oid,:int] := sql.bind(X_2,"sys","tab1","index_col",0,0,4); | | (X_82:bat[:oid,:oid] ,X_83:bat[:oid,:int] ) := sql.bind(X_2,"sys","tab1","index_col",2,0,4); | | X_119 := sql.delta(X_78,X_82,X_83); | | X_123 := algebra.leftfetchjoin(X_70,X_119); | | X_10:bat[:oid,:oid] := sql.tid(X_2,"sys","tab2"); | | X_12 := sql.bind(X_2,"sys","tab2","index_col",0); | | (X_13,r1_19) := sql.bind(X_2,"sys","tab2","index_col",2); | | X_15 := sql.bind(X_2,"sys","tab2","index_col",1); | | X_16 := sql.delta(X_12,X_13,r1_19,X_15); | | X_17 := algebra.leftfetchjoin(X_10,X_16); | | (X_127,X_128) := algebra.join(X_123,X_17); | | X_180 := algebra.leftfetchjoin(X_127,X_70); | | X_90:bat[:oid,:int] := sql.bind(X_2,"sys","tab1","group_by_col",0,0,4); | | (X_94:bat[:oid,:oid] ,X_95:bat[:oid,:int] ) := sql.bind(X_2,"sys","tab1","group_by_col",2,0,4); | | X_136 := sql.delta(X_90,X_94,X_95); | | X_143:bat[:oid,:int] := algebra.leftfetchjoin(X_180,X_136); | | (X_147,X_148,X_149) := group.subgroupdone(X_143); | | X_150 := algebra.leftfetchjoin(X_148,X_143); | | X_72:bat[:oid,:oid] := sql.tid(X_2,"sys","tab1",1,4); | | X_79:bat[:oid,:int] := sql.bind(X_2,"sys","tab1","index_col",0,1,4); | | (X_84:bat[:oid,:oid] ,X_85:bat[:oid,:int] ) := sql.bind(X_2,"sys","tab1","index_col",2,1,4); | | X_120 := sql.delta(X_79,X_84,X_85); | | X_124 := algebra.leftfetchjoin(X_72,X_120); | | (X_129,X_130) := algebra.join(X_124,X_17); | | X_181 := algebra.leftfetchjoin(X_129,X_72); | | X_91:bat[:oid,:int] := sql.bind(X_2,"sys","tab1","group_by_col",0,1,4); | | (X_96:bat[:oid,:oid] ,X_97:bat[:oid,:int] ) := sql.bind(X_2,"sys","tab1","group_by_col",2,1,4); | | X_138 := sql.delta(X_91,X_96,X_97); | | X_144:bat[:oid,:int] := algebra.leftfetchjoin(X_181,X_138); | | (X_151,X_152,X_153) := group.subgroupdone(X_144); | | X_154 := algebra.leftfetchjoin(X_152,X_144); | | X_74:bat[:oid,:oid] := sql.tid(X_2,"sys","tab1",2,4); | | X_80:bat[:oid,:int] := sql.bind(X_2,"sys","tab1","index_col",0,2,4); | | (X_86:bat[:oid,:oid] ,X_87:bat[:oid,:int] ) := sql.bind(X_2,"sys","tab1","index_col",2,2,4); | | X_121 := sql.delta(X_80,X_86,X_87); | | X_125 := algebra.leftfetchjoin(X_74,X_121); | | (X_131,X_132) := algebra.join(X_125,X_17); | | X_182 := algebra.leftfetchjoin(X_131,X_74); | | X_92:bat[:oid,:int] := sql.bind(X_2,"sys","tab1","group_by_col",0,2,4); | | (X_98:bat[:oid,:oid] ,X_99:bat[:oid,:int] ) := sql.bind(X_2,"sys","tab1","group_by_col",2,2,4); | | X_140 := sql.delta(X_92,X_98,X_99); | | X_145:bat[:oid,:int] := algebra.leftfetchjoin(X_182,X_140); | | (X_155,X_156,X_157) := group.subgroupdone(X_145); | | X_158 := algebra.leftfetchjoin(X_156,X_145); | | X_76:bat[:oid,:oid] := sql.tid(X_2,"sys","tab1",3,4); | | X_81:bat[:oid,:int] := sql.bind(X_2,"sys","tab1","index_col",0,3,4); | | (X_88:bat[:oid,:oid] ,X_89:bat[:oid,:int] ) := sql.bind(X_2,"sys","tab1","index_col",2,3,4); | | X_8 := sql.bind(X_2,"sys","tab1","index_col",1); | | X_122 := sql.delta(X_81,X_88,X_89,X_8); | | X_126 := algebra.leftfetchjoin(X_76,X_122); | | (X_133,X_134) := algebra.join(X_126,X_17); | | X_183 := algebra.leftfetchjoin(X_133,X_76); | | X_93:bat[:oid,:int] := sql.bind(X_2,"sys","tab1","group_by_col",0,3,4); | | (X_100:bat[:oid,:oid] ,X_101:bat[:oid,:int] ) := sql.bind(X_2,"sys","tab1","group_by_col",2,3,4); | | X_19 := sql.bind(X_2,"sys","tab1","group_by_col",1); | | X_142 := sql.delta(X_93,X_100,X_101,X_19); | | X_146:bat[:oid,:int] := algebra.leftfetchjoin(X_183,X_142); | | (X_159,X_160,X_161) := group.subgroupdone(X_146); | | X_162 := algebra.leftfetchjoin(X_160,X_146); | | X_184 := mat.packIncrement(X_150,4); | | X_185 := mat.packIncrement(X_184,X_154); | | X_186 := mat.packIncrement(X_185,X_158); | | X_20 := mat.packIncrement(X_186,X_162); | | (X_21,r1_34,X_163) := group.subgroupdone(X_20); | | X_23 := algebra.leftfetchjoin(r1_34,X_20); | | X_103:bat[:oid,:dbl] := sql.bind(X_2,"sys","tab1","f",0,0,4); | | (X_111:bat[:oid,:oid] ,X_112:bat[:oid,:dbl] ) := sql.bind(X_2,"sys","tab1","f",2,0,4); | | X_168 := sql.delta(X_103,X_111,X_112); | | X_172:bat[:oid,:dbl] := algebra.leftfetchjoin(X_180,X_168); | | X_105:bat[:oid,:dbl] := sql.bind(X_2,"sys","tab1","f",0,1,4); | | (X_113:bat[:oid,:oid] ,X_114:bat[:oid,:dbl] ) := sql.bind(X_2,"sys","tab1","f",2,1,4); | | X_169 := sql.delta(X_105,X_113,X_114); | | X_173:bat[:oid,:dbl] := algebra.leftfetchjoin(X_181,X_169); | | X_107:bat[:oid,:dbl] := sql.bind(X_2,"sys","tab1","f",0,2,4); | | (X_115:bat[:oid,:oid] ,X_116:bat[:oid,:dbl] ) := sql.bind(X_2,"sys","tab1","f",2,2,4); | | X_170 := sql.delta(X_107,X_115,X_116); | | X_174:bat[:oid,:dbl] := algebra.leftfetchjoin(X_182,X_170); | | X_109:bat[:oid,:dbl] := sql.bind(X_2,"sys","tab1","f",0,3,4); | | (X_117:bat[:oid,:oid] ,X_118:bat[:oid,:dbl] ) := sql.bind(X_2,"sys","tab1","f",2,3,4); | | X_29 := sql.bind(X_2,"sys","tab1","f",1); | | X_171 := sql.delta(X_109,X_117,X_118,X_29); | | X_175:bat[:oid,:dbl] := algebra.leftfetchjoin(X_183,X_171); | | X_188 := mat.packIncrement(X_172,4); | | X_189 := mat.packIncrement(X_188,X_173); | | X_190 := mat.packIncrement(X_189,X_174); | | X_31 := mat.packIncrement(X_190,X_175); | | X_32 := sql.bind(X_2,"sys","tab2","f",0); | | (X_34,r1_53) := sql.bind(X_2,"sys","tab2","f",2); | | X_36 := sql.bind(X_2,"sys","tab2","f",1); | | X_37 := sql.delta(X_32,X_34,r1_53,X_36); | | X_38 := algebra.leftfetchjoin(X_10,X_37); | | X_176 := algebra.leftfetchjoin(X_128,X_38); | | X_177 := algebra.leftfetchjoin(X_130,X_38); | | X_178 := algebra.leftfetchjoin(X_132,X_38); | | X_179 := algebra.leftfetchjoin(X_134,X_38); | | X_192 := mat.packIncrement(X_176,4); | | X_193 := mat.packIncrement(X_192,X_177); | | X_194 := mat.packIncrement(X_193,X_178); | | X_39 := mat.packIncrement(X_194,X_179); | | X_40:bat[:oid,:dbl] := batudf.udf_multiply_dbl(X_31,X_39); | | X_41:bat[:oid,:dbl] := aggr.subsum(X_40,X_21,r1_34,true,true); | | language.pass(X_70); | | language.pass(X_143); | | language.pass(X_72); | | language.pass(X_144); | | language.pass(X_74); | | language.pass(X_145); | | language.pass(X_17); | | language.pass(X_76); | | language.pass(X_146); | | language.pass(X_20); | | language.pass(X_180); | | language.pass(X_181); | | language.pass(X_182); | | language.pass(X_183); | | language.pass(X_10); | | language.pass(X_38); | | language.pass(r1_34); | | exit X_196; | | X_187:bat[:oid,:int] := nil:bat[:oid,:int]; | | X_191:bat[:oid,:dbl] := nil:bat[:oid,:dbl]; | | X_195:bat[:oid,:dbl] := nil:bat[:oid,:dbl]; | | X_43 := sql.resultSet(2,1,X_23); | | sql.rsColumn(X_43,"sys.tab1","group_by_col","int",32,0,X_23); | | sql.rsColumn(X_43,"sys.L1","L1","double",53,0,X_41); | | X_55 := io.stdout(); | | sql.exportResult(X_55,X_43); | | end s2_1; | +-------------------------------------------------------------------------------------------------------+

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