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Linux, Software

Tuning ZFS Volumes

by: Cédric R. Bruderer2021-04-26

Below are some parameters I found to improve the speed of my ZFS volumes. zfs set xattr=sa <poolname> zfs set acltype=posixacl <poolname> zfs set compression=lz4 […]

Linux, Software

GlusterFS Performance improvements

by: Cédric R. Bruderer2021-04-19

Here is a list of parameters I found over time to improve the speed of my GlusterFS instances. gluster volume set <volname> config.global-threading on gluster […]

Linux, Software

How to GlusterFS to a new hostname

by: Cédric R. Bruderer2021-04-12

While it is rather easy to change the hostname of the Linux box the GlusterFS is sitting, Gluster might not be so kind. Good thing […]

Linux, macOS, Software

Prevent SSH connection from timing out

by: Cédric R. Bruderer2021-04-06

In case you are plagued by SSH connections dying in the worst moments and the following waiting period, here might be the solution to your […]

GitLab

Verify all users eMail-Adress over GitLab Rails console

by: Cédric R. Bruderer2020-07-23

With the release of GitLab 13.2 I ran into a serious issue when logging in. The issues behaviour was, that I would only get an […]

MariaDB, MySQL

Get random entries in MySQL and MariaDB

by: Cédric R. Bruderer2020-07-13

If you want to get a random value (or more than one) from a MariaDB or MySQL database, you can accomplish this quite easy. All […]

Web server

Certbot challenge behind reverse proxy

by: Cédric R. Bruderer2019-12-16

To fulfil the certbot HTTP-01 challenge for receiving a Let’s Encrypt certificate you need to have a document root that is reachable from the internet. […]

MySQL

Why is varchar(255) not varchar(255)?

by: Cédric R. Bruderer2017-08-24

Working on a clients question, I stumbled over an issue with replication and mixed character sets. I was asked, wether it is possible to replicate […]

Web server

Multiple web sites behind one domain

by: Cédric R. Bruderer2017-08-19

Edit the site config of the Apache web server. You can find them under /etc/apache2/sites-available/ (If they are not there, I am sorry, but Google […]

Featured, MySQL

How changing the table definition can break your replication

by: Cédric R. Bruderer2017-07-31

MySQL replication has become quite sturdy over the years, but there are some things it still does not like. One of this is changing the […]

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