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Dealing with corrupted InnoDB data

Dealing with corrupted InnoDB data

Data corruption! It can happen. Maybe because of a bug or storage problem that you didn’t expect, or MySQL crashes when a page checksum’s result is different from what is expected. Either way, corrupted InnoDB data can and does occur. What do you do then?...

Making Apache Spark Four Times Faster

This is a followup to my previous post Apache Spark with Air ontime performance data. To recap an interesting point in that post: when using 48 cores with the server, the result was worse than with 12 cores. I wanted to understand the reason is was true, so I started...
OpenSSH CVE-2016-0777: Details and Mitigation

OpenSSH CVE-2016-0777: Details and Mitigation

Earlier today advisories were sent out regarding OpenSSH versions 5.4 through 7.1., informing users about a security bug in the software. In essence, the advisory instructed people to add the   UseRoaming no option to their ssh_config file, with a promise for further...

Prometheus as an Engine for MySQL Monitoring

When I first discovered Graphite years ago, I was very impressed with its monitoring capabilities.  Compared to many RRD-based tools that were popular at the time (like Cacti), Graphite separated the captured data and graphs, allowing you to do all kinds of math and...
Logical MySQL backup tool Mydumper 0.9.1 now available

Logical MySQL backup tool Mydumper 0.9.1 now available

The new Mydumper 0.9.1 version, which includes many new features and bug fixes, is now available.  You can download the code from here. A significant change included in this version now enables Mydumper to handle all schema objects!!  So there is no longer a...
MySQL 5.7: CHANGE REPLICATION FILTER online

MySQL 5.7: CHANGE REPLICATION FILTER online

MySQL 5.7 has a lot of enhancements and new features. I summarized this list previously in this blog post. Adding replication filters online is one of the MySQL 5.7 features described in this manual. However, I will describe and summarize a few examples in this blog...