The Brainiac Corner is a format where we talk with some of the smartest minds in the system, database, devops, and IT world. If you have opinions on pirates, or anything else related, please don’t hesitate to contact us. 

Today we interview Camille Fournier, the current the CTO at Rent the Runway. Follow her on twitter @skamille.

How did you get from stork to brainiac (i.e. what do you do today and how did you get there)?

I’m currently the CTO of Rent the Runway, a company that rents designer dresses and accessories. My journey into tech is a familiar one; enjoyed computers as a kid, decided that computer science would be a smart area to go into based on the growth of personal computing in the 80s and early …

would you please post the accountig query that you have implemented, because i have implemented a query but in log file i get acctinputoctets= 0 and acctoutputoctets= 0
this is the file: sqlcounter monthlytrafficcounter {
counter-name = Monthly-Traffic
check-name = Max-Monthly-Traffic
reply-name = Monthly-Traffic-Limit
sqlmod-inst = sql
key = User-Name
reset = monthly
query = “SELECT IFNULL (acctinputoctets + acctoutputoctets),0) as counter FROM radacct WHERE Username=’%{%k}’ AND UNIX_TIMESTAMP (AcctStartTime > ‘%b’ ”
}

i really need help !

With the rise of agile development methodologies, more and more systems and applications are built in series of iterations. This is true for the database schema as well, as it has to evolve together with the application. Unfortunately, schema changes and databases do not play well together. Changes usually require plenty of advance scheduling, and can be disruptive to your operations. 

In this new webinar, we will discuss how to implement schema changes in the least impacting way to your operations and ensure availability of your database. We will also cover some real-life examples and discuss how to handle them.

DATE & TIME

Europe/MEA/APAC
Tuesday, August 25th at 09:00 BST / 10:00 CEST (Germany, France, Sweden)
Register Now

North America/LatAm
Tuesday, August …

MySQL replication is a process that allows you to easily maintain multiple copies of MySQL data by having them copied automatically from a master to a slave database.

It’s essential to make sure the slave servers have the same set of data as the master to ensure data is consistent within the replication stream. MySQL slave server data can drift from the master for many reasons – e.g. replication errors, accidental direct updates on slave, etc.

Here at Percona Support we highly recommend that our customers periodically run the pt-table-checksum tool to verify data consistency within replication streams. Specifically, after fixing replication errors on slave servers to ensure that the slave has identical data as its master. As you don’t want to put …

In the theoretical part of this series, we have seen the basics of monitoring. In that article, though, we have barely mentioned the new tools available in MySQL 5.7 and MariaDB 10. Let’s start from something that has the potential of dramatically changing replication as we know it.
Crash-safe tables and Global transaction identifiers in MySQL 5.6 and 5.7Global transaction identifiers (GTID) is a feature that has been in my wish list for long time, since the times I was working with the MySQL team. By the time I left Oracle, this feature was not even in the plans.
When MySQL 5.6 was first disclosed, the biggest improvement for replication was the introduction of crash-safe tables (see Status persistence in …

Object-relational mapping is common in most modern web frameworks such as Ruby on Rails. For the developer APIs, the ORM provides simplified interaction with the database and a productivity boost. However, the layer of abstraction the ORM provides can hide how the database is being queried. If you’re not paying attention, these generated queries can have a negative effect on your database’s health and performance.

In this webinar, Owen Zanzal discussed ways common Rails ORMs can abuse various databases and how VividCortex can discover them. Themes covered include N+1 Queries, Missing Indexes, and Caching.

If you did not have a chance to join the webinar live, you can register for a recording here.

…

Object-relational mapping is common in most modern web frameworks such as Ruby on Rails. For the developer APIs, the ORM provides simplified interaction with the database and a productivity boost. However, the layer of abstraction the ORM provides can hide how the database is being queried. If you’re not paying attention, these generated queries can have a negative effect on your database’s health and performance.

In this webinar, Owen Zanzal discussed ways common Rails ORMs can abuse various databases and how VividCortex can discover them. Themes covered include N+1 Queries, Missing Indexes, and Caching.

If you did not have a chance to join the webinar live, you can register for a recording here.

…

This past week I have been the sole MySQL representative on the Oracle Technology Network (OTN) Latin America 2015 tour events in Uruguay, Argentina, Chile and Peru.

Download Presentation

In this presentation I talk about the important steps for testing and verifying your MySQL backup strategy to ensure your business continuity in any disaster recovery situation. This includes:

• Overview of the primary product options
• Backup and recovery strategy considerations
• Technical requirements
• Common problems observed
• What about a failover strategy

In April, I wrote a blog post introducing the new InnoDB virtual column and effective functional index work for the JSON lab release. Now the feature is officially in MySQL 5.7.8. It’s worth revisiting the topic again in order to write about what is in the 5.7 Release Candidate, along with providing some additional examples.…

Recent changes to support better security by increasing strength of Diffie-Hellman cipher suites from 512-bit to 2048-bit were introduced to MySQL Server 5.7. While this change enhances security, it is an aggressive change in that 2048-bit DH ciphers are not universally supported. This has become a problem specifically for Java users, as only Java 8 JRE (currently) supports DH ciphers greater than 1024 bits. Making the problem more acute, this change was back-ported from MySQL Server 5.7 to the recent 5.6.26 and 5.5.45 releases in response to a community bug report. This blog post will identify affected applications, existing workarounds, and our plans to provide a more …