Oli Sennhauser of FromDual.

Synchronous multi-master replication with the Galera plugin. Your application connects to the load balancer and it redirects read/write traffic to the various MySQL Galera nodes. Tested a setup with 17 SQL nodes and you can have even more. Scaling reads and also a little bit for scaling writes is what Galera is good for.

If one node fails, the other two nodes still communicates with each other and the load balancer is aware of the failed node.

Why Galera? There is master-slave replication but its not multi-master, and its asynchronous and you can get inconsistencies. There is master-master replication but its asynchronous and can have inconsistencies and conflicts if you write on both nodes. MHA/MMM/Tungsten are not providing new technology but are based on the MySQL replication technology. …

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Mark Riddoch of SkySQL.

This was a talk about the future in general. What people would like. Etc. Not about something that exists yet, hence the sparse notes.

Trace statements are good for the “why”. You move on to the debugger, but what is a useful SQL debugger? Profilers addresses the “when”.

SQL developer tools: manually run queries (traditional route for development, effective way to test SQL statements, some indication of performance), server logs (alerts developers of serious issues like the slow query log – identify poorly written queries, requires server access, not effective in a cloud environment (?)), external monitoring (network sniffing of connection packets, Ethereal dissectors – allow individual connections to be traced, no server access, privileged network access, complex to interpret, possibility of packet loss), intrusive tools (insert …

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Ralf Gebhardt of SkySQL.

Cluster: shared nothing architecture (no single point of failure), synchronous replication between nodes, ACID transactions, row level locking. In-memory storage (some data can be stored on disk, but indexes must be in-memory). Checkpointing to disk for durability. It supports two types of indexes – ordered T-trees, unique hash indexes. Online operations like adding node groups, software upgrades, table alterations. Quick standard architecture diagram displayed about MySQL Cluster.

Network partitioning protocol is designed to avoid a split brain scenario. Is there at least one node from each node group? If not then this part cannot continue – graceful shutdown. Are all nodes present from any node group? If so, then this is the only viable cluster – continue to operate. Ask the arbitrator – the arbitrator which parts will continue if no arbitrator …

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First talk at FOSDEM MySQL Devroom by Oli Sennhauser, of FromDual. Quick notes/liveblog of the talk, plus links from a quick search.

New Release Model: starts with at least in beta quality, milestone releases are RC quality (every 3-6 months), between milestones new features are allowed, GA releases every 12-18 months, no more than 2 releases in active support. There is also MySQL Labs, in where features can make it into a release model, but not necessarily.

Oli’s guess: MySQL 5.6 GA in April 2012 (Collaborate) or June 2012. As a consequence, MySQL 5.0 and MySQL 5.1 will be EOL probably by April this year.

New improvements in partitioning: explicit partition selection, exchanging partitions (good for ETL jobs).

New improvements in InnoDB: InnoDB INFORMATION_SCHEMA has got some new entries. Buffer …

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I’m about to head to Paris to present at the February meetup of the MySQL User Group in Paris, France. It happens 1st February from 6-8pm at the Patricks Irish Pub. Its free to attend, and I understand that SkySQL keeps this event afloat.

I’m also heading to my first FOSDEM right afterwards and will definitely hang out at the MySQL & Friends Devroom. There is an amazing lineup of speakers, with all talks being about 25-30 minutes, it looks like it is going to be a lot of fun. To boot, Michael “Monty” Widenius will also be there, so expect lots of Salmiakkikossu.

If you want …

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As many of you know, the schedule had been set for FOSDEM.

Giuseppe had posted the full scehdule here:

http://datacharmer.blogspot.com/2012/01/mysql-and-friends-schedule-at-fosdem.html

However, I refreshed the FOSDEM list (provided at fosdem.org) and noticed some changes to the schedule late last week.

http://fosdem.org/2012/schedule/track/mysql_and_friends_devroom

Specifically, I noticed new talks by Oli Sennhauser ("New Features in MySQL 5.6"), Alexey Yurchenko ("Galera 2.0"), Steve Hardy ("Optimizing your innodb buffer pool usage"), Liz van Dijk ("Virtualized Databases"), and Stéphane Combaudon ("Practical indexing guidelines").

…

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The MySQL DevRoom at FOSDEM is ready. The schedule has been voted. Thanks to all who have participated. Now, let's make sure that the event is successful. The schedule is juicy, and not only because I have three talks in it!

Sunday 2012-02-05
Event	Speaker	Room	When
All you need to know about migrations and you never dared to ask	…

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There is a room dedicated to MySQL at FOSDEM 2012. (Thanks to @lefred for organizing). The CfP has received 37 submissions, but there will be time slots only for 12 to 15 talks. So now it's up to the community. If you want to attend a particular talk, you should vote for it. Like in previous years, the selection of the talks is public. You can see the list of the proposals, with the instructions, which I repeat here. You can vote either publicly, using Twitter, or privately, by sending an email. Each talk proposal will be referred by the number immediately after the title in this page. …

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It's that time of the year where MySQL would be speakers are called to action. As usual, the main event is the MySQL spring conference, this year hosted by Percona. The call for participation to the MySQL Conference And Expo 2012 is still open until December 5th. To submit a proposal, you should register as a speaker and then fill in the form.
There is a conference committee which is already busy evaluating the proposals that have been submitted so far. The committee is demanding (I know for a fact, since I am in it!) and therefore, if you want to submit something, be very critical with yourself and polish your …

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on Friday evening , apparently having a confirmed reservation in a resto is not enough to actually be welcome at that restaurant. at DrupalDevdays, only 2 laptops were open during our presentation at DrupalDevdays, almost nobody in the room was already using CI at Fosdem , the parking lot is full before 11:30 on a saturday at Fosdem , much less Macs than last years . at Fosdem , way too much rooms are already at full capacity so you need to have 2-3 backup alternatives .. at Fosdem , people expect me to be in certain rooms, at the same time at Fosdem , even with too much rooms already full one still misses a bunch of interresting talks at Fosdem , one doesn't even realize friends are speaking there too .. at Fosdem , Android is the standard ... at Fosdem , you are confronted with the fact you probably forgot more names of people than you remember ;( at Fosdem , you are surrounded by famous open source people, that aren't even on the schedule at the MySQL Meetup Dinner, Monty brings …[Read more]