Planet MySQL Planet MySQL: Meta Deutsch Español Français Italiano 日本語 Русский Português 中文
Showing entries 1 to 10 of 33884 10 Older Entries
MMUG11: Talk about binlog servers at Madrid MySQL Users Group meeting on 29th January 2015
+0 Vote Up -0Vote Down

Madrid MySQL Users Group will have its next meeting on Thursday, the 29th of January.

I will be giving a presentation on the MySQL binlog server and how it can be used to help scale reads and be used for other purposes.  If you have (more than) a few slaves this talk might be interesting for you.  The meeting will be in Spanish. I hope to see you there.

Details can be found on the group’s Meetup page here: http://www.meetup.com/Madrid-MySQL-users-group/events/219810484/

…  [Read more...]
Performance issues and fixes -- MySQL 5.6 Semi-Synchrnous Replication
+0 Vote Up -0Vote Down

 Long time ago I wrote a blog post that we started using Semi-Synchronous replication in production at Facebook. We are running our own MySQL facebook-5.6 branch, which added many replication (including Semisync) patches. Some of them were also merged with WebScaleSQL.

 Recently I heard from people from community that they were suffering from Semisync performance issues in …

  [Read more...]
Presenting Undrop for InnoDB Toolkit on Percona Live 2015
+0 Vote Up -0Vote Down

I’ll be presenting Undrop for InnoDB data recovery toolkit on Percona Live 2015. The conference takes place in Santa Clara on 13-16 April.

You may wonder why do I care if I plan to drop none of my production databases. To name few reasons:

  • Taxes, death and data loss are inevitable
  • Good knowledge of how InnoDB stores data on disk help to design fast and scalable databases
  • The toolkit can be used to troubleshoot bugs in InnoDB.

So bookmark the session, it’s going to be a great discussion.

  [Read more...]
How to Bootstrap MySQL/MariaDB Galera Cluster
+0 Vote Up -0Vote Down

January 27, 2015 By Severalnines

Unlike standard MySQL server and MySQL Cluster, the way to start a MySQL/MariaDB Galera Cluster is a bit different. Galera requires you to start a node in a cluster as a reference point, before the remaining nodes are able to join and form the cluster. This process is known as cluster bootstrap. Bootstrapping is an initial step to introduce a database node as primary component, before others see it as a reference point to sync up data.

 

How does it work?

 

When Galera starts with the bootstrap command on a node, that particular node will reach Primary state (check …

  [Read more...]
Reading RBR binary logs with pt-query-digest
+0 Vote Up -0Vote Down

For purposes of auditing anything that goes on our servers we're looking to parse the binary logs of all servers (masters), as with "Anemomaster". With Row Based Replication this is problematic since pt-query-digest does not support parsing RBR binary logs (true for 2.2.12, latest at this time).

I've written a simple script that translates RBR logs to SBR-like logs, with a little bit of cheating. My interest …

  [Read more...]
MySQL benchmarks on eXFlash DIMMs
+0 Vote Up -0Vote Down

In this blog post, we will discuss MySQL performance on eXFlash DIMMs. Earlier we measured the IO performance of these storage devices with sysbench fileio.

Environment

The benchmarking environment was the same as the one we did sysbench fileio in.

CPU: 2x Intel Xeon E5-2690 (hyper threading enabled)
FusionIO driver version: 3.2.6 build 1212
Operating system: CentOS 6.5
Kernel version: 2.6.32-431.el6.x86_64

In this case, we used a separate machine for testing which had a 10G ethernet …




  [Read more...]
One More Possible Reason for ERROR 1959 (OP000) Invalid role specification
+0 Vote Up -0Vote Down

Mon, 2015-01-26 09:59chris.calender

I ran into this error today while working with ROLES, bundled privileges for a group of users (a nice addition in MariaDB 10.0):

ERROR 1959 (OP000) Invalid role specification

The manual suggests that this error occurs "if a role that doesn't exist, or to which the user has not been assigned, is …

  [Read more...]
MySQL Cluster 7.2
+10 Vote Up -1Vote Down

MySQL Cluster 7.2 (7.2.19 GA, published on Monday, 26 Jan 2015)

Shinguz: MySQL table Point-in-Time-Recovery from mysqldump backup
+0 Vote Up -0Vote Down

Taxonomy upgrade extras: BackupRestoreRecoverymysqldumppoint-in-time-recoverypitr

Sometimes we face the situation where we have a full MySQL database backup done with mysqldump and then we have to restore and recover just …

  [Read more...]
So long, and thanks for all the help.
+1 Vote Up -0Vote Down



Today is my last day at Tokutek. On Monday I'm starting a new opportunity as VP/Technology at CrunchTime!. If you are a web developer, database developer, or quality assurance engineer in the Boston area and looking for a new opportunity please contact me or visit the CrunchTime! career page.

I've really enjoyed my …



  [Read more...]
Showing entries 1 to 10 of 33884 10 Older Entries

Planet MySQL © 1995, 2015, Oracle Corporation and/or its affiliates   Legal Policies | Your Privacy Rights | Terms of Use

Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by Oracle and does not necessarily represent the opinion of Oracle or any other party.