I was rooting through past blog entries and I stumbled accross a draft post on setting up multi-master (update anywhere) asynchronous replication for MySQL Cluster. The post never quite got finished and published and while the material is now 4 years old it may still be helpfull to some and so I’m posting it now. Note that a lot has happened with MySQL Cluster in the last 4 years and in this area, the most notable change has been the Enhanced conflict resolution with MySQL Cluster active-active replication feature introduced in MySQL Cluster 7.2 and if you’re only dealing with a pair of Clusters, that’s your best option as it removed the need for you to maintain the timestamp columns and backs out entire transactions rather than just the conflicting rows. So when would you use this “legacy” method? The main use case is when you want conflict detection/resolution among a ring of more than …

From my testing MySQL Cluster on the Raspberry Pi’s I thought I’d share this little extract, just in case someone tries the same, some day.. somewhere.. why? I don’t know.

Ok, so when we pull the plug on one of the pi’s, we have of each component falling down, but because one of them is the arbitrator (node-id=2) then cluster falls over.

Before the ‘accident’:

  ndb_mgm -e show

Connected to Management Server at: localhost:1186
Cluster Configuration
———————
[ndbd(NDB)]     2 node(s)
id=3    @10.0.0.6  (mysql-5.5.25 ndb-7.3.0, Nodegroup: 0, Master)
id=4    @10.0.0.7  (mysql-5.5.25 ndb-7.3.0, Nodegroup: 0)

[ndb_mgmd(MGM)] 2 node(s)
id=1    @10.0.0.6  (mysql-5.5.25 ndb-7.3.0)
id=2    @10.0.0.7  (mysql-5.5.25 ndb-7.3.0) …

From my testing MySQL Cluster on the Raspberry Pi's I thought I'd share this little extract, just in case someone tries the same, some day.. somewhere.. why? I don't know.

Ok, so when we pull the plug on one of the pi's, we have of each component falling down, but because one of them is the arbitrator (node-id=2) then cluster falls over.

Before the 'accident':   ndb_mgm -e show

Connected to

Ok, so I’ve been playing around with the idea of setting up MySQL cluster on a couple of Raspberry Pi’s and this is how it has been going.

References

First of all, for anyone else who’s reading this, it’s not a new thing, I know, and I highly recommend reading A.Morgans blog, http://www.clusterdb.com/mysql-cluster/mysql-cluster-running-on-raspberry-pi/ as well as someone else’s blog: http://markswarbrick.wordpress.com/, cheers Mark.

So, to make it all possible, here’s what I bought:

Ok, so I've been playing around with the idea of setting up MySQL cluster on a couple of Raspberry Pi's and this is how it has been going.

References First of all, for anyone else who's reading this, it's not a new thing, I know, and I highly recommend reading A.Morgans blog, http://www.clusterdb.com/mysql-cluster/mysql-cluster-running-on-raspberry-pi/ as well as someone else's blog: http://

Note that the webinar replay + transcript of the Questions and Answers is now available from here.

On Thursday 12th September I’ll be co-presenting a free webinar on how MySQL Cluster delivers the key benefits of NoSQL Data Stores without having to give up the features that people rely on from relational databases (consistency, SQL etc.). There will be particular focus on how to use the new node.js JavaScript API which was recently released as part of MySQL Cluster 7.3.  As usual the webinar is free but you should …

On 17th October I’ll be running a hands-on workshop on the various technologies available to provide High Availability using MySQL. The workshop is being held on 17th October (the day before the All Your Base conference) in Oxford (UK). The cost is £250 + VAT and you can register here.

This workshop provides an introduction to what High Availability (HA) is; what technology options are available to achieve it with MySQL and how to actually implement your own HA solutions. The session will be a mixture of presentations, demonstrations and (most importantly) hands-on tutorials.

We’ll start with an overview of High Availability – in general and in the context of MySQL and then a survey of the technologies to choose from:

• MySQL …

The sessions for this year’s MySQL Connect conference have now been scheduled – as you can see below, my 2 MySQL Cluster sessions will be on Saturday 21st September at 11:30 and 14:30 (Pacific).

The MySQL Connect conference is a great opportunity to listen to and chat with people from the MySQL community – including the engineers who work on or around MySQL as well people who are using it in production. The conference takes place from 21-23 September in San Francisco (runs up to Oracle OpenWorld). There are 84 sessions scheduled and the content catalog has now been published.

I’ll be …

I’ll be presenting the keynote for Wednesday’s (31st July) MySQL Virtual Developer Day. The idea behind this event is that you get half a day of on-line presentations as well as live Q&A. My session focuses on what’s new in MySQL – in particular MySQL 5.6 and MySQL Cluster 7.3. As you’ll come to have expected, the event is free but you need to register here.
In the following agenda, all times are local to Singapore…

Good afternoon Oscon attendees - in particular attendees of my High Availability in MySQL tutorial!

Attached you can find a spreadsheet (both LibreOffice, Excel) that we will use at the end of the tutorial. You can also download the slides, in case you wish to browse them at your own pace.