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Showing entries 1 to 5

Displaying posts with tag: rambling (reset)

Reports exaggerated
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I've been letting the blog rest recently, and not so recently as well.  The problem is not a lack of subjects, but a lack of time to do them any justice.  However it is quite sad to see that my last entry was in September 2012, so it is time to post again.

Of late I have been pondering what I have to say about :

  • Distributed MVCC and write-scaling
  • Different approaches to eventual consistency with replicated RDBMS
  • Various MySQL Cluster related topics
  • Various general rambling and unstructured topics

However, these will take some time to percolate and calcify. …




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Saturday at MySQL Connect
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The first day of the first MySQL Connect conference is done.  It's been a busy day!  Many attendees are interested in the new MySQL Server 5.6 release, but of course MySQL Cluster is the main draw here.  After a session from Oracle on the new features in 7.2, and early access features in 7.3, I attended Santo Leto's MySQL Cluster 'hands on lab'.  Despite having started more clusters than most, it felt like a new and exciting experience installing and running my cluster alongside everyone else.  The lab machines had some networking issues, but with Santo's …

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The CAP theorem and MySQL Cluster
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tldr; A single MySQL Cluster prioritises Consistency in Network partition events. Asynchronously replicating MySQL Clusters prioritise Availability in Network partition events.

I was recently asked about the relationship between MySQL Cluster and the CAP theorem. The CAP theorem is often described as a pick two out of three problem, such as choosing from good, cheap, fast. You can have any two, but you can't have all three. For CAP the three qualities are 'Consistency', 'Availability' and 'Partition tolerance'. CAP states that in a system with data replicated over a …

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One billion
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As always, I am a little late, but I want to jump on the bandwagon and mention the recent MySQL Cluster milestone of passing 1 billion queries per minute. Apart from echoing the arbitrarily large ransom demand of Dr Evil, what does this mean?

Obviously 1 billion is only of interest to us humans as we generally happen to have 10 fingers, and seem to name multiples in steps of 10^3 for some reason. Each processor involved in this benchmark is clocked at several billion …

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ACID tradeoffs, modularity, plugins, Drizzle
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Most software people are aware of the ACID acronym coined by Jim Gray. With the growth of the web and open source, the scaling and complexity constraints imposed on DBMS implementations supporting ACID are more visible, and new (or at least new terms for known) compromises and tradeoffs are being discussed widely. The better known NoSQL systems are giving insight by example into particular choices of tradeoffs.

Working at MySQL, I have often been surprised at the variety of potential alternatives when …

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Showing entries 1 to 5

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