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Showing entries 1 to 10 of 1173 10 Older Entries

Displaying posts with tag: Databases (reset)

The differences between IDEMPOTENT and AUTO-REPAIR mode
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I posted recently Lossless RBR for MySQL 8.0 about a concern I have about moving to minimal RBR in MySQL 8.0.  This seems to be the direction that Oracle is considering, but I am not sure it is a good idea as a default setting.

I talked about a hypothetical new replication mode lossless RBR and also about recovery after a crash where perhaps the data on the slave may get out of sync with the master. Under normal circumstances this should not happen but in the real world sometimes it does. …

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Lossless RBR for MySQL 8.0?
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Lossless RBR

TL/DR: There’s been talk of moving the next release of MySQL to minimal RBR: I’d like to suggest an alternative: lossless RBR

For MySQL 5.8 there was talk / suggestions about moving to minimal RBR as the default configuration (http://mysqlserverteam.com/planning-the-defaults-for-mysql-5-8/).  I’m not comfortable with this because it means that by default you do not have the full data in the binlog stream of the changes to a table. 

The use of minimal RBR is an optimisation, it is …

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MySQL 5.7 Introduces a JSON Data Type
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There's a new JSON data type available in MySQL 5.7 that I've been playing with. I wanted to share some examples of when it's useful to have JSON data in your MySQL database and how to work with the new data types (not least so I can refer back to them later!)

MySQL isn't the first database to offer JSON storage; the document databases (such as MongoDB, CouchDB) work on a JSON or JSON-ish basis by design, and other platforms including PostgreSQL, Oracle and SQL Server also have varying degress of JSON support. With such wide adoption as MySQL has, the JSON features are now reaching a new tribe of developers.

Why JSON Is Awesome

Traditional …

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MMUG15: MySQL 5.7 & JSON
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English: The Madrid MySQL Users Group is pleased to announce its next meeting on February 10th 2016 at 7pm at the offices of Tuenti in Gran Via, Madrid.  Morgan Tocker of Oracle will be visiting to give a talk on MySQL 5.7 and JSON as part of a European tour.  This will give you an an excellent opportunity to learn about the new …

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MySQL RDS Point-in-time restore
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RDS for MySQL on AWS allows you to restore to any point in time for your backup retention period, minus the last 5 minutes or so. Restoration creates a new instance, it does not overwrite whatever instance you’re restoring. AWS’s use of the word restore is a bit confusing because restore often means “take your production database server and overwrite it with data from a backup”. As far as I can tell, Amazon never means this. When you restore, AWS creates another database server and writes all the data to the new instance, both when you’re using restoring to a point-in-time or from a DB snapshot. If you needed to switch servers, you’d have to point your database to …

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Is MySQL X faster than MySQL Y? – Ask queryprofiler
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When trying out new software there are many other questions you may ask and one of those is going to be the one above. The answer requires you to have built your software to capture and record low level database metrics and often the focus of application developers is slightly different: they focus on how fast the application runs, but do not pay direct attention to the speed of each MySQL query they generate, at least under normal circumstances. So often they are not necessarily able to answer the question.

I have been evaluating MySQL 5.7 for some time, but only since its change to GA status has the focus has switched to check for any …

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A Couple of MySQL 5.7 gotchas to be aware of
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MySQL 5.7 GA was released a couple of months ago now with 5.7.9 and 5.7.10 has been published a few days ago.  So far initial testing of these versions looks pretty good and both versions have proved to be stable.

I have, however, been bitten by a couple of gotchas which if you are not aware of them may be a bit of a surprise. This post is to bring them to …

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LLC-Technologies-Collier/Demo-SCCC-Byte-AngularJS
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Hello dear readers and attendees,

This is the post that I will be/ will have been referencing during my presentation to the Seattle Central Community College’s Byte club on Thursday, December 10th at 1500-1630.

I will begin with a bit of an autobio and find out what kind of students we have in attendance. Please feel free to comment if you’d like to keep in touch before or after the presentation. I will discuss some of the bits and pieces of some industry standard platforms which I’ve developed, deployed, maintained, managed, co-operated, administered and replaced. We can discuss some of the patterns that work well in the industry, and some that are a bit harder to …

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Tarski and Codd
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Wikipedia says that “Relational calculus is essentially equivalent to first-order logic, and indeed, Codd’s Theorem had been known to logicians since the late 1940s.”  I couldn’t find the cited sources online, but did find these interesting papers:

Applications of Alfred Tarski’s Ideas in Database Theory

and

Tarski’s influence on computer science.” (see the …

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MMUG14: MySQL Automation at Facebook
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English: Madrid MySQL Users Group will be holding their next meeting on Tuesday, 10th November at 19:30h at the offices of Tuenti in Madrid. David Fernández will be offering a presentation “MySQL Automation @ FB”.  If you’re in Madrid and are interested please come along. We have not been able to give much advance notice so if you know of others who may be interested please forward on this information.  Full details of the MeetUp can be found here at the Madrid MySQL Users Group page.

Español: El …

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Showing entries 1 to 10 of 1173 10 Older Entries

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