users-list July 2007

users-list@monetdb.org

24 participants
29 discussions

by Colin Foss

Is there any method, besides restarting the database, of shrinking the sql log file? When I am performing a large set of large inserts (via COPY INTO) the log file gets very large. I wish there was a way to cycle the log file. Also during these large batches of inserts the database server becomes less and less responsive until I am forced to restart the server. Upon restart and the normal recovery monet returns to a very responsive state.

14 years, 3 months

[MonetDB-users] Not responding after sql server restart

by Franco Guidoli

Hi all: I'm trying to measure the response time of MonetDB against a commercial RDBMS, so I've made a dump of the data from my current database in order to load into MonetDB. I have approximately 2.6 million rows, divided into 26 flat files of 100k rows each one, which I load using then SQL command "copy into....". Everything works ok with the data load (performing a commit after each 100k file), and I can make use of that data in the same session from which I've loaded the data, but when I restart MonetDB Server, I can't login via SQL (I can start MonetDB Server, but SQL Client doesn't respond). Apparently, from what I can realize, after the shutdown of MonetDB Server, there is a big log file in Monet's sql_logs directory, and when I get a response from SQL Client, the log file is apparently empty (I've realized this loading only 200k rows). Is this the expected behaviour for the MonetDB SQL Server? Did I miss anything in order to avoid this? After the second start of the server, this doesn't happen anymore until I load new data. I'm working with MonetDB Server v5.0.0_beta1_2 (downloaded msi from sourceforge) over Windows XP, and the SQL Client is via JDBC. Thanks in advance for any help you can give me. Franco -- View this message in context: http://www.nabble.com/Not-responding-after-sql-server-restart-tf3762198.htm… Sent from the monetdb-users mailing list archive at Nabble.com.

14 years, 10 months

[MonetDB-users] (no subject)

by Webber

14 years, 12 months

[MonetDB-users] SQL Explorer - SQL Frontend for MonetDB/SQL

by Bharani

Hi, I know Monetdb works with aqua studio,sql view. But if you are working with eclipse it is nice to have a plugin that talks to monetdb. I have just came across http://eclipsesql.sourceforge.net/. It looks really nice and is jdbc compliant. There is a standalone version as well if you dont use eclipse. Thanks Bharani -- View this message in context: http://www.nabble.com/SQL-Explorer---SQL-Frontend-for-MonetDB-SQL-tf4168853… Sent from the monetdb-users mailing list archive at Nabble.com.

14 years, 12 months

[MonetDB-users] 税务代理

by 王先生

振兴贸易有限公司致公司财务部: 很抱歉打扰您的宝贵时间,希望对贵司在业务运作、补账、作账会有所帮助。我司因进项多，并受多家公司委托，可代开些余额的发票（普通国税、地税、商品销售、公路内河运输、国际海运业、广告、服务、建筑安装、）以及其它发票等，数额大可优惠。票据都是税务局开出或由企业直接开出，可先验证票据后付款的方式合作。愿与您一起诚信合作，互惠互利！欢迎来电来邮联系！业务手机:13824479828 联系人:王先生 QQ:286055683 李小姐QQ:122750996 联系邮箱:papass2006@126.com 顺祝商祺! 如有朋友客户需要麻烦转告，回扣再议！！

14 years, 12 months

[MonetDB-users] 税务代理

by 王先生

15 years

[MonetDB-users] Database backup/restore

by Venks

Hi, I am trying to test the backup/restore of a MonetDB database. I installed MonetDB latest version on a 32Bit Red hat Linux. I created a database on Machine-1, created a table and loaded the table with 1M rows. After that I shutdown the database and took a back-up of the entire "dbfarm" directory. I moved the backup to Machine-2 where the "dbfarm" directory points to the similar location as Machine-1. I then opened the database on Machine-2 but there is no table/data on Machine2 even though the directory contents between the 2 machines appear the same. Please let me know if I am missing something. I also made sure that Machine-2 is not creating the database in any other location, except the location where I copied all the files. The idea here is to create the database on one machine and then move the database to different machine using simple file system COPY. Thanks, - Venks

15 years

Re: [MonetDB-users] Pictures

by Erick Hays

Hello! I am bored today. I am nice girl that would like to chat with you. Email me at onauz(a)imailmessage.info only, because I am writing not from my personal email. Wanna see some pictures of me?

15 years

[MonetDB-users] 怎样才能使产品更具市场竞争力

by 艾尔产品设计

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15 years

[MonetDB-users] Introducing the Merovingian: a MonetDB 5 database keeper

by Fabian Groffen

Hi all, I'd like to bring a little program to your attention that may or may not be useful to you: merovingian. Merovingian is meant as end-user program to start and stop one or more MonetDB databases. The program allows itself to be naturally used into start and stop scripts, as well as manual use from the console. It is aimed at MonetDB5/SQL users. In short, merovingian performs two basic tasks: 1. handle connections from clients and redirect those connections to the appropriate mserver process, and 2. start an mserver process in case it is not running (any more). Currently, an appropriate mserver process is defined by the database a client requests for. Since each mserver process only serves one database, multiple mserver processes are necessary to deal with multiple databases. Because merovingian can start mserver processes on demand, it has the potential to (attempt to) restart an mserver after it has crashed. Since merovingian will (currently only) start mserver processes, output of those processes might get confusing, especially when multiple servers are started. Also, interacting with them is non-trivial. For this reason, merovingian starts mserver processes as daemon processes in the background and catches their outputs to display it in a log-like fashion. Distinction is made between messages and errors. Not surprisingly both outputs can be written to a logfile on disk or just outputted to the console. An example output on the console would look like this: % merovingian demo MSG merovingian[30160]: Merovingian 0.3 starting ... MSG mserver5[30162]: executing 'bin/mserver5' for database 'demo' MSG merovingian[30160]: monitoring dbfarm var/MonetDB5/dbfarm MSG merovingian[30160]: listening for connections on pegasus.ins.cwi.nl:50000 MSG merovingian[30160]: starting database 'demo' ERR mserver5[30162]: #warning: please don't forget to set your vault key! ERR mserver5[30162]: #(see etc/monetdb5.conf) MSG mserver5[30162]: # MonetDB server v5.1.0, based on kernel v1.19.0 MSG mserver5[30162]: # Serving database 'demo' MSG mserver5[30162]: # Compiled for x86_64-pc-linux-gnu/64bit with 64bit OIDs dynamically linked MSG mserver5[30162]: # Copyright (c) 1993-2007 CWI, all rights reserved MSG mserver5[30162]: # Visit http://monetdb.cwi.nl/ for further information MSG mserver5[30162]: # Listening for connection requests on mapi:monetdb://127.0.0.1:50001/ In this example merovingian was requested to start database demo upfront, without waiting for a client to ask for it. Without the demo argument, merovingian waits for connections that ask for a database and starts it at that time. An arbitrary number of databases can be given as "pre-start" arguments. Pre-starting databases can be important when clients are used that do not request for a specific database. In such case, the client is redirected to the first database that is running at that moment. Please look at the Merovingian section in the etc/monetdb5.conf file for more options for merovingian. The section is still small, but it might grow. Merovingian is available in the development branch (CVS head) of the MonetDB5 repository. Feedback is welcome.

15 years

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users-list July 2007