- discuss - lists.mariadb.org

[Maria-discuss] Question about MariaDB Non-blocking Client
by Mike Gibson 07 Aug '13

07 Aug '13

Greetings, I'm using the MariaDB Non-blocking API to write a C++ client, but I've hit a wall regarding connection checking. I've been referencing the binding from node-mariasql ( https://github.com/mscdex/node-mariasql/blob/master/src/binding.cc) My app parses a config and creates new objects for each query, where each object has a MYSQL struct and MYSQL *pointer. Then, for each I set state to STATE_CONNECT and call doWork(). This works fine, when I can connect right away. The problem I'm experiencing is if I have a connection and kill the server (/etc/init.d/mysql stop) and then start it back (/etc/init.d/mysql start), I can never get clean reconnects. It's usually a mixture of errcode 2058, 2003, 2013. I'm really confused how to gracefully manage connections. Before I was using the official MySQL C++ connector, and it provides a connection->isConnected() method. I'm wondering how I can get something similar with MariaDB's client, as I need the non-blocking interface. Given: MYSQL mysql, *mysqlHandle; Look at the mysql_real_connect_start() or cont() functions. I provide MYSQL struct and on connect I get a copy of the struct stored in *mysqlHandle. It's not clear to me what the purpose of the copy is at this point as I still use the initial struct to call query(). In the case that I can detect a disconnection, how do I properly clean up the connection and attempt reconnect? Do I mysql_close(&mysql) and/or mysql_close(mysqlHandle), shutdown/close the file descriptor, mysql_init() a new handle and go through mysql_real_connect_start/cont()? Does it even make sense for each object to have its own MYSQL struct that I mysql_init(), or would it be better to have layer on top that mysql_init()s a single MYSQL struct, connects, and passes the returned *mysqlHandle to each query? Thanks for providing the async client, any help is appreciated.

2 2

[Maria-discuss] New Question: Web Applications do not receive all data in Galera Cluster
by AskMonty KB 07 Aug '13

07 Aug '13

Hello, A new question has been asked in "Replication" by confidus: -------------------------------- Hello, I have a real strange issue. I have a web application that appears to not show the correct records. I am using a load balancer for a web farm for a billing system. I am also using a load balancer for the Galera cluster. When a trouble ticket is generated, sometimes that ticket is not available on all the web servers, but when I look at each individual MariaDB server, I see the record. Data commits are synced and all looks good from the cluster side of things. I can perform a mysqldump to another database and point the billing system to that database and all is good. If I reboot each MariaDB server one by one, things start working again. It almost seems like there is some caching where the database cluster at times only shows records that were generated by that web server. I did check that all the web servers in the farm are using the same load balanced ip address for the MariaDB farm and they are. I have replicated this on two different web applications (A CRM & Billing system) both on different web farms. -------------------------------- To view or answer this question please visit: http://kb.askmonty.org/en/web-applications-do-not-receive-all-data-in-galer…

1 0

Re: [Maria-discuss] MariaDB-Galera plans?
by Daniel Bartholomew 07 Aug '13

07 Aug '13

On Tue, Aug 6, 2013 at 3:30 AM, Jan Kirchhoff <j.kirchhoff(a)logical-line.de> wrote: > any news on this? I have a 5.5.29 cluster running fine for some time > now, but I'd actually like to have some functionality of MariaDB 10, > so I am waiting for a 10.0-Galera-release... > what's the packaging problem about? The packaging issues I'm involved with are: https://mariadb.atlassian.net/browse/MDEV-4229 and https://mariadb.atlassian.net/browse/MDEV-4141 I'm hoping to have some sort of fix for both issues within a day or so, and shortly after that to have a release. I don't know the status of MariaDB Galera Cluster 10.0. Thanks. -- Daniel Bartholomew Google+ - http://gplus.to/dbart Twitter - http://twitter.com/daniel_bart MariaDB: An Enhanced Drop-in Replacement for MySQL Website - http://mariadb.org Twitter - http://twitter.com/mariadb Google+ - http://google.com/+mariadb Facebook - http://fb.com/MariaDB.dbms Knowledgebase - http://kb.askmonty.org

1 0

[Maria-discuss] MariaDB-Galera plans?
by Aleksey Sanin 06 Aug '13

06 Aug '13

Hello, There have been no MariaDB-Galera releases since March and I am curious if you still plan to support it going forward. It feels that MariaDB-Galera development stopped completely and I wonder if I should be switching to Percona instead. Best, Aleksey

3 3

[Maria-discuss] Compiling
by Roberto Spadim 05 Aug '13

05 Aug '13

Hi guys, i installed slackware-14 downloaded the mariadb-source of 10.0.3 tar -zxf mariadb.tgz cd mariadb-10.0.3 BUILD/configure-pentium64-max and it stoped at: [ 37%] Building CXX object libmysqld/CMakeFiles/sql_embedded.dir/__/sql/sql_yacc.cc.o Linking CXX static library libsql_embedded.a [ 37%] Built target sql_embedded gmake: *** [all] Error 2 the point is... why? any log or something like it to check what happened? -- Roberto Spadim

2 10

[Maria-discuss] New Question: mariadb on Cubieboard (ARM AllWinner A10)
by AskMonty KB 04 Aug '13

04 Aug '13

Hello, A new question has been asked in "Does MariaDB support..." by aemlin: -------------------------------- Hello, I'm using mariadb on Cubieboard (within a debian server). The compile of the sources for 5.5 did work perfectly but the 10.0 does not compile , is it possible to have some help to get it running ? Also is there a way to make my mariadb 5.5 available for other users (by exemple as a .deb file)? -------------------------------- To view or answer this question please visit: http://kb.askmonty.org/en/mariadb-on-cubieboard-arm-allwinner-a10/

1 0

[Maria-discuss] RFC opengis and libs
by Roberto Spadim 02 Aug '13

02 Aug '13

hi guys, does we use one lib for opengis? i was using this one with php and c, and i think it's a nice library, maybe a port of this to mariadb should be nice http://trac.osgeo.org/geos/ -- Roberto Spadim SPAEmpresarial

1 0

Re: [Maria-discuss] Compiling
by Roberto Spadim 02 Aug '13

02 Aug '13

please remove this user from list, his email don't exists anymore: alexandre.almeida(a)hti.com.br thanks 2013/8/2 <alexandre(a)hti.com.br>: > Esta conta de email não está mais em uso. A mensagem não foi entregue. Favor reenvie para alexandre.almeida(a)hti.com.br > > This account is no longer in use. The message wasn't delivered. Please resend the message to alexandre.almeida(a)hti.com.br > > -- Roberto Spadim SPAEmpresarial

1 0

Re: [Maria-discuss] Which JOIN
by Richard Couture 31 Jul '13

31 Jul '13

On 07/30/2013 09:17 PM, Roberto Spadim wrote: > ---- > other tip, instead of full table name, *USE* alias > FROM ArticulosPedidos AS a, PedidosIndex AS b, CartArticulos AS c > b.NumDePedido=a.NumDePedido AND > a.ArticuloID=c.ArticuloID > > this decrease TCP/IP or UNIX SOCKET packets... if you have a very high qps > (query per second) this can save a lot of ethernet, example > 1000 queries of 1KB=1MB/second , if you can save near to 50B per query, you > will use 950*1000 = 950KB, in other words, you can send 5% more bytes over > network without changing hardware > --- > The idea is good but the syntax fails The following syntax however does work select sum( CantidadPedida ) as SumPedida, sum( CantidadRecibida ) as SumRecibida, ArticuloCodigo, ArticuloNombre, ArticuloCosto, ArticulosDisponibles, ArticuloUnidad from ArticulosPedidos as a inner join PedidosIndex as b on b.NumDePedido = a.NumDePedido inner join CatArticulos as c on a.ArticuloID = c.ArticuloID where a.Fecha between '{$_POST{'MovsDelAno'}}-{$_POST{'MovsDelMes'}}-{$_POST{'MovsDelDia'}}' and '{$_POST{'MovsAlAno'}}-{$_POST{'MovsAlMes'}}-{$_POST{'MovsAlDia'}}' group by a.ArticuloID order by SumPedida DESC limit 500; Thanks for the tip Richard -- LinuxCabal Asociación Civil Ing. Richard Couture Novell CNE, ECNE, MCNE HP/Compaq ASE Tel.: (+52) (333) 145-2638 Cel.: (+52) (044) 333 377-7505 Cel.: (+52) (044) 333 377-7506 Web: http://www.LinuxCabal.org E-Mail: rrc(a)linuxcabal.org Hosted en la nube Cloud Sigma - www.CloudSigma.com AVISO DE CONFIDENCIALIDAD: Este correo electrónico, incluyendo en su caso, los archivos adjuntos al mismo, pueden contener información de carácter confidencial y/o privilegiada, y se envían a la atención única y exclusivamente de la persona y/o entidad a quien va dirigido. La copia, revisión, uso, revelación y/o distribución de dicha información confidencial sin la autorización por escrito de LinuxCabal está prohibida. Si usted no es el destinatario a quien se dirige el presente correo, favor de contactar al remitente respondiendo al presente correo y eliminar el correo original incluyendo sus archivos, así como cualesquiera copia del mismo. Mediante la recepción del presente correo usted reconoce y acepta que en caso de incumplimiento de su parte y/o de sus representantes a los términos antes mencionados, LinuxCabal tendrá derecho a los daños y perjuicios que esto le cause.

1 0

[Maria-discuss] Which JOIN
by Richard Couture 31 Jul '13

31 Jul '13

I have a table of transactions for ArticleID bought and sold. I want to create a report of the fileds in that table sorted by the SUM of each ArticleID. Any suggestions??? Thanks Richard -- LinuxCabal Asociación Civil Ing. Richard Couture Novell CNE, ECNE, MCNE HP/Compaq ASE Tel.: (+52) (333) 145-2638 Cel.: (+52) (044) 333 377-7505 Cel.: (+52) (044) 333 377-7506 Web: http://www.LinuxCabal.org E-Mail: rrc(a)linuxcabal.org Hosted en la nube Cloud Sigma - www.CloudSigma.com AVISO DE CONFIDENCIALIDAD: Este correo electrónico, incluyendo en su caso, los archivos adjuntos al mismo, pueden contener información de carácter confidencial y/o privilegiada, y se envían a la atención única y exclusivamente de la persona y/o entidad a quien va dirigido. La copia, revisión, uso, revelación y/o distribución de dicha información confidencial sin la autorización por escrito de LinuxCabal está prohibida. Si usted no es el destinatario a quien se dirige el presente correo, favor de contactar al remitente respondiendo al presente correo y eliminar el correo original incluyendo sus archivos, así como cualesquiera copia del mismo. Mediante la recepción del presente correo usted reconoce y acepta que en caso de incumplimiento de su parte y/o de sus representantes a los términos antes mencionados, LinuxCabal tendrá derecho a los daños y perjuicios que esto le cause.

2 3