lefred's blog


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Advanced Percona XtraDB Cluster in a Nutshell, La Suite: Hands-on Tutorial (Not for Beginners!)

Also during Percona Live with my colleague Kenny Gryp, we delivered a tutorial on Percona XtraDB Cluster (Galera) These are the slides:   Advanced percona xtra db cluster in a nutshell… la suite plsc2016 from Frédéric Descamps


Galera Replication Demystified: How Does It Work?

At Percona Live 2016, I presented a talk related to Galera. I tried to explain what’s really behind the magic. I think it’s essential for all who want to use Galera replication in MySQL to understand all these concepts. These are the slides: Galera Replication Demystified: How Does It Work? from Frédéric Descamps    


New blog !

Hi, I’ve finally decided to upgrade my old drupal 6.x blog… I tried Drupal 8, but to be honest I finally migrated to WordPress. WordPress is more easy to maintain, to deal with and also it has a nice Mobile App that I can use to review comments, edit posts, etc… Welcome to the new blog and let’s hope I … Read More


Percona Live, MySQL Conference & Expo 2016

Hello,
Percona Live 2016, Data Performance Conference Santa Clara, April 13-16, 2015
Like every year since I joined Percona, I also plan to speak at the next Percona Live Conference & Expo in Santa Clara during spring 2016.

Once again I want to share with the users, DBAs and developers my experience related to MySQL High Availability and especially with Galera.

This year, Percona implemented a Community Vote to rate the talks you would like to see in the schedule. So if you want to attend one or more of my talks, please vote for them.

Of course, I invite you to rate other people’s talk too, that will help the organisation and the Conference Committee to prepare the schedule.

These are the direct links to my talks and tutorial:

* https://www.percona.com/live/data-performance-conference-2016/sessions/advanced-percona-xtradb-cluster-nutshell-la-suite-hands-tutorial-not-beginners#community-voting
* https://www.percona.com/live/data-performance-conference-2016/sessions/undelete-rows-binary-log-hacking-session#community-voting
* https://www.percona.com/live/data-performance-conference-2016/sessions/galera-replication-demistified-how-does-it-work#community-voting
* https://www.percona.com/live/data-performance-conference-2016/sessions/revisited-tips-improve-your-galera-cluster-experience#community-voting


NetworkManager, OpenVPN on Fedora 21

On openvpn setups where MD5 is still in use with the SSL certificate, it’s now impossible to connect when you are in Fedora 21.

To allow openvpn client to connect to such VPN using NetworkManager, you need to modify /usr/lib/systemd/system/NetworkManager.service and add the following two lines in [Service] section:

Environment="NSS_HASH_ALG_SUPPORT=+MD5" Environment="OPENSSL_ENABLE_MD5_VERIFY=1"

Restart the service and it will work 😉


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