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  • Mysql ndb cluster - node restart.

    - by Arafat
    Hi guys! I just setup a mysql cluster on a fairly decent baby (IBM x3650 M3) with 24GB memory, xeon 6core, SAS 6Gbps HDD. Running Debian Lenny 5. 64bits. Ndb version is 7.1.9a. Our database size on MyISAM is around 3.2 GB. Ndb_size estimation is 58GB for ndbengine. A little info about my database is as follows. 150 common tables for global purpose. 130 tables for each clients. So it goes like this, 130 x 115(clients) = 14950 tables. Is it normal or usual to have 14000 tables on one database? The reasons why we did this was, Easy maintenance and per client based customization. Now, the problem is, ndb cluster can only support, 20320 tables. But it can support 5,000,000,000 rows in one table if I'm not wrong. My real head ache is my cluster data node takes less than two minutes to startup with out any data. But as soon as convert my tables into ndb, that too only 2000 tables, data node takes at least 30 to 40 mins to start up. Is it normal? If I convertt all my tables into ndb, will it take even longer? Or let's say if consolidate my 14000 table's data into one, which is 130 tables, will it help? Or is there anything idiotically wrong which I'm doing? I'll attach my config.ini file soon. here's the simple overview of my config Datamemory = 14G Indexmemory = 3GB Maxnooftable = 14000 Maxnoofattributes = 78000 I'm just testing these values with 2000 tables first. Please advise, how to increase the start up speed. Please point out where I'm going wrong. Thanks in advance guys!

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  • No password mysql under linux?

    - by ripper234
    I was told that mysql user, similar to root user, by default "has no password". Not an empty password, but rather "no password". I wasn't aware this situation was possible - I thought every user on a linux had to have a password. Am I wrong? Can you point me to a link that explain this?

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  • No mysql password under linux?

    - by ripper234
    I was told that mysql user, similar to root user, by default "has no password". Not an empty password, but rather "no password". I wasn't aware this situation was possible - I thought every user on a linux had to have a password. Am I wrong? Can you point me to a link that explain this?

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  • MySQL: Load database to memory

    - by Adam Matan
    Hi, Is there a way to load an entire MySQL database to the RAM, especially on en EC2 server? The database is quite small (~500 MegaBytes) I have enough memory Speed issues are crucial - the resulted queries are used to serve a dynamic webpage. Thanks, Adam

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  • Tomcat cannot connect to MySQL on localhost

    - by David
    Hi, I have deployed an application on my Tomcat server with JDBC resources defined. What is puzzling me is that I can connect to the database (which is running locally on the server) only using the server's IP. When I change the resource host to localhost (or 127.0.0.1) then MySQL rejects the connection. I don't want to be connection via the server's IP but rather locally. What do I do? Thanks!

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  • MySQL keeps adding additional user without rights from specific IP

    - by Niels B.
    I'm running MySQL Server 5.5.29 on Ubuntu Server 13.04 I have a created a user with a wildcard host access % and given him various privileges. However, whenever this user connects from 194.182.245.61, a new user account is created for that specific IP address with no rights and he is unable to exercise his privileges. When he connects from other internet connections, such as his home IP, it works just as it should. Why does this happen and how can I stop it from happening?

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  • Is this a HPC or HA mySQL cluster?

    - by Louise Hoffman
    Can someone tell me if this is a High Performance Compute or High Available mySQL cluster? There is a picture of the setup. This is part of the config.ini they talk about [ndbd default] NoOfReplicas=2 # Number of replicas Is it correct understood that NoOfReplicas determines if I have a HPC or a HA cluster?

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  • Check mysql slow queries

    - by Rafal Kaminski
    Is it possible to monitoring mysql like: if some queries is run more then 300 seconds - it will be warnings if some queries is run more then 500 seconds - it will be critical I tried: /usr/lib/nagios/plugins/check_mysql_health --hostname localhost --username icinga --password XXX --mode slow-queries --warning 300 But is show only rate slow_queries/per second :( Do you have some idea how i can monitoring sth. like i want? Thank you for help. Br,

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  • Are these mySQL user settings vulnerable?

    - by Kavon Farvardin
    I'm using myphpadmin to manage the databases and I'm new to SQL in general. Am I suppose to keep an open anonymous user on localhost so things like drupal can access mySQL? It seems like having a non-passworded root on my server's hostname is retarded but I don't know what I'm doing with this in general. The user who's name starts with a b is the one I use to login and do things like make a database.

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  • MySQL 5.1.34 on NFS w/NetApp

    - by shrisha
    Is this still a bad idea? I know older versions of MySQL performed poorly with NFS. I imagine the issue lies with the usage of fsnc() and/or O_DIRECT. If the issues are mostly resolved, are there common pitfalls/gotchas, specifically around a large (multiple tables with tens of millions of records) InnoDB database that may see up to 20-50 reads/sec

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  • Changing the character encoding of a MySQL database

    - by Julien Genestoux
    Our whole application is now able to handle UTF-8 and it will be our choice in terms of encoding all across our architecture. The last step is to change the encoding of our MySQL databases. Of course, ALTER TABLE db_table CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci; should be able to convert each of the tables to the right UTF8 encoding, yet, is there anything else I should do? I believe that the my.cnf configuration file needs to be changed as well.

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  • Graphical MySQL tools

    - by Shlomo Shmai
    Are there any good graphical tools (preferably free) for navigating a MySQL database? I find myself doing a lot of the same SQL queries to look at data in the tables. I would imagine there's a GUI for doing this that makes life easier. Any one know of such a thing? Thanks a lot.

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  • Upload database backup from mysql to Amazon S3 or Glacier without creating local file

    - by Rubem Azenha
    Is there a tool that makes possible to backup a Mysql database to Amazon S3 or Amazon Glacier without having o create a local file with the database contents? Something like that: mysqldump -u root -ppass -h host --all-databases | magical-s3-tool s3-bucket backup-yyyy-mm-dd.sql This magical tool would use the pipe data and transfer the backup data directly to S3, without creating a local file.

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  • MySQL: table is marked as crashed

    - by DrStalker
    After a disk full issue one of the MySQL DBs on the server is coming up with the following error when I try to back it up: [root@mybox ~]# mysqldump -p --result-file=/tmp/dbbackup.sql --database myDBname Enter password: mysqldump: Got error: 145: Table './myDBname/myTable1' is marked as crashed and should be repaired when using LOCK TABLES A bit of investigation shows two tables have this issue. What needs to be done to fix up the damaged tables?

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