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Showing entries 1 to 30 of 15808 Next 30 Older Entries

Displaying posts with tag: mysql (reset)

Geographically distributed multi-master MySQL clusters
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In today's webinar, we discuss the multi-master capabilities of Continuent Tungsten to help you build and manage systems that spread data across multiple sites.  We cover important topics such as setting up large scale topologies, handling failures, and how to handle data privacy issues like removing personally identifiable information or handling privacy law restrictions on data movement. We
DFW Unix User group talk May 1st
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Come hear about MySQL at the May 1st DFWUUG Dallas / Fort Worth Unix User group Meeting. Always a great crowd, good pizza, and fun. Seven PM at NEW IBM Innovation Center at 1177 South Beltline Road, in Coppell,


The Perfect Server - Ubuntu 14.04 (Apache2, PHP, MySQL, PureFTPD, BIND, Dovecot, ISPConfig 3)
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The Perfect Server - Ubuntu 14.04 (Apache2, PHP, MySQL, PureFTPD, BIND, Dovecot, ISPConfig 3)

This tutorial shows how to prepare an Ubuntu 14.04 (Trusty Tahr) server (with Apache2, BIND, Dovecot) for the installation of ISPConfig 3, and how to install ISPConfig 3. ISPConfig 3 is a webhosting control panel that allows you to configure the following services through a web browser: Apache or nginx web server, Postfix mail server, Courier or Dovecot IMAP/POP3 server, MySQL, BIND or MyDNS nameserver, PureFTPd, SpamAssassin, ClamAV, and many more. This setup covers Apache (instead of nginx), BIND (instead of MyDNS), and Dovecot (instead of Courier).

MySQL at OpenSUSE Conference, Dubrovnik, Croatia & JavaScript UnConference, Hamburg, Germany
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The OpenSUSE Conference in Dubrovnik, Croatia started today and will continue till Monday April 28, 2014. MySQL team is going to be part of this event. Do not miss to visit our booth, which will be located on the ground floor as well as come to listen 2 MySQL talks (see OpenSUSE schedule):

  • Georgi Kodinov is going to have a talk about "Protect your MySQL server". His talk is scheduled for Friday, April 25, 2014 @ 13:00 in Ragusa mtg.room 
  • Norvald Ryeng will talk about "The upstream view" - Package maintenance as seen from MySQL Engineering. His talk is scheduled for Sunday, April 27, 2014 @ 13:00 in Ragusa mtg.room

For the whole conference plan you can check the

  [Read more...]
Encrypted and incremental MySQL backups with Percona XtraBackup
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We’ve recently received a number of questions on how to implement incremental MySQL backups alongside encryption with Percona XtraBackup. Some users thought it was not initially possible because with the default

--encrypt
options with XtraBackup, all files will be encrypted, but alas, that is not the case. This is where the option
--extra-lsn-dir
becomes useful, because it allows you to save LSN (Log Sequence Number) information to another directory and exclude it from encryption, allowing you to use the same information needed by incremental backups. Enough talk, let me show you.

Because you would want to usually script your backup and restore procedure, I’d use variables here as well to make you more familiar. First,

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How to Setup Centralized Authentication of ClusterControl Users with LDAP
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April 24, 2014 By Severalnines

ClusterControl 1.2.6 introduces integration with Active Directory and LDAP authentication. This allows users to log into ClusterControl by using their corporate credentials instead of a separate password. LDAP groups can be mapped onto ClusterControl user groups to apply roles to the entire group, so it is very convenient for larger organizations who have a centralized LDAP-compliant authentication system. This blog shows you how to configure LDAP authentication in ClusterControl, and allow users to use their Active Directory or LDAP username and password to log in to ClusterControl. 

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MariaDB 10.0.10 uploaded to Debian experimental
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If you’re watching the NEW queue, you’ll notice that MariaDB 10.0.10 has been uploaded targeting Debian/experimental. Package description, and to think the bug was only opened on April 2nd – pretty quick turnaround.

Related posts:

  • MariaDB in Debian unstable
  • Debian releases Lenny, MySQL 5.1 soon
  • MariaDB in Gentoo; updates for Solaris/Debian SPARC
  • Really large NLP corpora
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    Jeeze people. You’re all noisy. I’m sure it was all done for posterity’s sake.

    23M     irclogs/MagNET/#perl.log
    29M     irclogs/freenode/#mysql.log
    36M     irclogs/freenode/#debian.log
    37M     irclogs/foonetic/#xkcd.log
    39M     irclogs/OFTC/#debian.log
    43M     irclogs/freenode/#jquery.log
    44M     irclogs/freenode/#perl.log
    
    Concurrent, read-only, not cached: MongoDB, TokuMX, MySQL
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    I repeated the tests described here using a database larger than RAM. The test database has 8 collections/tables with 400M documents/rows per table. I previously reported results for this workload using a server with 24 CPU cores and a slightly different flash storage device. This time I provide a graph and use a server with more CPU cores. The goal for this test is to determine whether the DBMS can use the capacity of a high-performance storage device, the impact from different filesystem readahead settings for MongoDB and TokuMX and the impact from different read page sizes for TokuMX and InnoDB. It will take two blog posts to share everything. I think I will have much better QPS  [Read more...]
    RW locks are hard
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    MongoDB and TokuMX saturated at a lower QPS rate then MySQL when running read-only workloads on a cached database with high concurrency. Many of the stalls were on the per-database RW-lock and I was curious about the benefit from removing that lock. I hacked MongoDB to not use the RW-lock per query (not safe for production) and repeated the test. I got less than 5% more QPS at 32 concurrent clients. I expected more, looked at performance with PMP and quickly realized there were several other sources of mutex contention that are largely hidden by contention on the per-database RW-lock. So this problem won't be easy to fix but I think it can be fixed.

    The easy way to implement a reader-writer lock uses the pattern

      [Read more...]
    Newbie password mistake
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    I received a panic call from a newbie MySQL DBA. Or should I say the ‘Linux Admin’/’MySQl DBA’/’CSS guru’/’PHP Programmer’/’Network Admin’/’Backup Operator’/’CIO’ of a small business. He had reset his password was was now locked out. Luckily, he had only changed his password and still had root access.

    What he did:
    mysql>use mysql;
    SET PASSWORD for 'mrdoesall'@'10.%' to 'bigsecret';
    mysql>

    Long time MySQL DBAs should be groaning at this with a wince remembering when it happened to them. For those of you who did not catch the problem, what happened is that he value in the user.password table is set to the string ‘bigsecret’. When our friend tries to login, the password is encrypted and compared to the value





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    Percona Live 2014 behind; MySQL ahead
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    I started using MySQL 11 years ago.  That’s not too long compared to other people in the industry, but nonetheless here’s my perspective on the state of the MySQL industry after attending Percona Live MySQL Conference & Expo 2104.

    In short, the attitude around MySQL has changed from “Does it work?” to “Is it fast and reliable?” to “How do we manage it?” To further generalize, these periods correspond roughly to the original MySQL AB team, Percona and Oracle, and the last period is the current period so key players are emerging, like WebScaleSQL.

    Does it work?

    Peter Zaitsev said in one of his

      [Read more...]
    Ubuntu 14.04 – some MySQL ecosystem notes
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    Following my previous post on the launch, I just rolled Ubuntu 14.04 LTS on an Amazon EC2 t1.micro instance (not something you expect to run a database server on, for sure – 1 vCPU, 0.613GiB RAM). If you do an apt-cache search mysql you get 435 return result sets with the default configuration (trusty: main & universe).

    If you do apt-get install mysql-server, you get MySQL 5.5. You enter the password of choice, and before you know it, MySQL is installed (a SELECT VERSION() will return 5.5.35-1ubuntu1).

    Next you decide to install MariaDB. I run an apt-get install mariadb-server. It pulls in libjemalloc (for TokuDB) and I expect future releases to ship this engine by default. You enter the password, and

      [Read more...]
    Concurrent, read-only & cached: MongoDB, TokuMX, MySQL
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    This has results for a read-only workload where all data is cached. The test query fetches all columns in one doucment/row by PK. For InnoDB all data is in the buffer pool. For TokuMX and MongoDB all data is in the OS filesystem cache and accessed via mmap'd files. The test server has 40 CPU cores with HT enabled and the test clients share the host with mysqld/mongod to reduce variance from network latency. This was similar to a previous test, except the database is in cache and the test host has more CPU cores. The summary of my results is:
    • MongoDB 2.6 has a performance regression from using more CPU per query. The regression might be limited to simple queries that do single row lookups on the _id index. I spent a bit of time rediscovering how to get hierarchical

      [Read more...]
    Using mysqldump and the MySQL binary log – a quick guide on how to backup and restore MySQL databases
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    Be sure to check out my other posts on mysqldump:
    - Scripting Backups of MySQL with Perl via mysqldump
    - Splitting a MySQL Dump File Into Smaller Files Via Perl
    - Creating and restoring database backups with mysqldump and MySQL Enterprise Backup – Part 1 of 2
    - Creating and restoring database backups with mysqldump and



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    MySQL Community Awards: Community Contributor of the Year 2014
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    As one decompresses from the active month that April brings to the MySQL ecosystem, its worth noting that I received a MySQL Community Award – Community Contributor of the Year 2014 award at the Percona Live MySQL Conference & Expo 2014 in Santa Clara. I was extremely happy and thankful to receive such an award and I still am. Thank you MySQL Community.

    My reason for winning, now immortalised:

    Colin’s list of service to the MySQL Community goes back almost 10

      [Read more...]
    See you at ICTexpo Helsinki 2014
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    ICTexpo Helsinki 2014 offers two effective days full of innovations, inspiration and information - the biggest professional IT show in the Nordics with large scale of solutions to help you to take your business to the next level. Continuent will be exhibiting in Red Hat Village [booth 5f31], which gathers the most significant enterprise level companies from the Open Source ecosystem in Finland
    MySQL April Newsletter: Latest MySQL Product Releases and More
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    MySQL April Newsletter is now available! Read this edition to learn more details about the abundant product announcements we made recently, including MySQL 5.7 Development Milestone Release, MySQL Workbench 6.1 GA, as well as the Release Candidate of MySQL Fabric. You'll also find information regarding the latest white papers (http://www.mysql.com/why-mysql/white-papers/), upcoming webinars (http://www.mysql.com/news-and-events/web-seminars/) and events (http://www.mysql.com/news-and-events/events/), and technical blogs for tips and tricks using MySQL.

    Enjoy and hope you find it informative! 

    MySQL for Visual Studio 1.2.0 alpha has been released
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    MySQL for Visual Studio is a product including all of the Visual Studio integration previously available as part of Connector/Net. The 1.2.0 version is an alpha release of this product that intents to introduce users to the new features in this version.
    ClusterControl 1.2.6 Released
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    April 22, 2014 By Severalnines

    The Severalnines team is pleased to announce the release of ClusterControl 1.2.6. This release contains key new features along with performance improvements and bug fixes. We have outlined some of the key features below. 

    Highlights of ClusterControl 1.2.6 include:

    • Centralized Authentication using LDAP or Active Directory
    • Role-Based Access Control 
    • OpenStack: Galera Deployment Automation
    • Hybrid setups with Galera and Asynchronous MySQL Replication
    • Manage multiple Galera Clusters with single Controller
      [Read more...]
    MariaDB Galera Cluster 10.0.10 now available
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    The MariaDB project is pleased to announce the immediate availability of MariaDB Galera Cluster 10.0.10. This is a Beta release.

    See the Release Notes and Changelog for detailed information on this release and the What is MariaDB Galera Cluster? page in the MariaDB Knowledge Base for general information about MariaDB Galera Cluster.

    Download MariaDB Galera Cluster 10.0.10

    Release Notes

      [Read more...]
    Making Use of Boost Geometry in MySQL GIS
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    This post talks about how we make use of Boost.Geometry in MySQL to implement reliable and efficient GIS functionality, as well as changes to the GIS features in the lab release. Now that InnoDB is the default storage engine for MySQL, our user base is rapidly transitioning to InnoDB. One capability that they have been demanding is a performant and scalable GIS implementation. Along with adding R-tree index support to InnoDB, we also decided to replace the original GIS algorithms with a more powerful, reliable, effective and efficient geometric engine.
    MySQL 5.7 and GIS, an Example
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    This post will offer a very simple demonstration of how you can use MySQL 5.7 for Spatial features within your applications. In order to demonstrate this, I’ll walk through how we can determine the 10 closest Thai restaurants to a particular location.
    Percona University @Montevideo, FISL & São Paulo MySQL Meetup
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    Peter Zaitsev at last year’s Percona University event in Montevideo

    Later this week I’m excited to depart on a trip to South America. First I will stop in Montevideo, Uruguay, to meet with Percona’s team out there as well as to participate in our next Percona University event on April 29.

    For those who do not know, Percona University events are free to attend and packed with technical presentations about MySQL and surrounding technologies, delivered by members of the Percona

      [Read more...]
    Percona Live 2014 Impressions
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    Three weeks ago I had the privilege of attending my first Percona Live MySQL conference, which was incredible! In particular, there were two things that I found impressive about the conference.

    First, was the amount of knowledge sharing and support that MySQL users provide each other; it truly is a community. Coming from EMC, I’ve attended several conferences in the past, but I’ve always considered them more of a marketing focused event, mostly spent doing product launches and company roadmaps and not much time fostering knowledge sharing and informal get-togethers: Percona Live was different. There were well thought out tutorials, information packed presentations, and keynotes rife with practical knowledge culled from the real world. I had many great conversations at our booth with people that have evaluated TokuDB or TokuMX or were planning to as soon as they got back into

      [Read more...]
    If you use MySQL in the Amazon cloud, you need to ask yourself this question
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    Join 25,000 others and follow Sean Hull on twitter @hullsean. Are you serious about backups? If you’re just using Amazon EBS snapshots, that may not be sufficient. There’s a good chance it won’t protect you against your next data loss. That’s why I like to have a few different types of backups Also: 5 more […]
    Using Apache Hadoop and Impala together with MySQL for data analysis
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    Apache Hadoop is commonly used for data analysis. It is fast for data loads and scalable. In a previous post I showed how to integrate MySQL with Hadoop. In this post I will show how to export a table from  MySQL to Hadoop, load the data to Cloudera Impala (columnar format) and run a reporting on top of that. For the examples below I will use the “ontime flight performance” data from my previous post (Increasing MySQL performance with parallel query execution). I’ve used the

      [Read more...]
    Start Learning MySQL Database at Your Own Pace
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    The MySQL for Beginners training course is your first step to mastering relational databases concepts, using MySQL products.

    You can take this training course at your own pace through the Training-on-Demand delivery option. Watch recorded training sessions by Oracle expert instructors and have access to a dedicated lab environment to get hands-on experience. With a Training-on-Demand course, you can start training within 24 hours of registration, booking time to do lab exercises at your own convenience.

    In the MySQL for Beginners course, you will use the world's most popular open source database to:

        [Read more...]
      The mystery of MySQL 5.6 excessive buffer pool flushing
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      I'm experimenting with upgrading to MySQL 5.6 and am experiencing an unexplained increase in disk I/O utilization. After discussing this with several people I'm publishing in the hope that someone has an enlightenment on this.

      We have a few dozens servers in a normal replication topology. On this particular replication topology we've already evaluated that STATEMENT based replication is faster than ROW based replication, and so we use SBR. We have two different workloads on our slaves, applied by two different HAProxy groups, on three different data centres. Hardware-wise, servers of two groups use either Virident SSD cards or normal SAS spindle disks.

      Our servers are I/O bound. A common query used by both workloads looks up data that does not necessarily have a hotspot, and is

        [Read more...]
      Monitoring DML/slow queries with graphite
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      pt-query-digest, Anemometer or "Anemomaster" do a great job of analysing your queries and giving you visibility into what's going on with your MySQL servers. However, the place where the query digests are written is just some MySQL tables on some server. Do you have monitoring/alerts on that table? How will you verify a specific query does not exceed some runtime/execution count threshold, and get notified when it does?

      At Outbrain we use Graphite to collect almost all of our data. We like it for its simplicity and for the fact it has a "push" strategy as opposed to "pull" strategy: every

        [Read more...]
      Showing entries 1 to 30 of 15808 Next 30 Older Entries

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