State transfer – SST or IST Let’s start by discussing what SST is and why we may want to avoid it if possible? We are not going into details regarding different types of state transfer methods in Galera. What should suffice to say is that there are two types – Incremental State Transfer (IST) and … Continued
As we have mentioned in one of our previous blog posts, clone plugin is a nice addition to MySQL as it allows users to easily provision nodes with data while not even leaving MySQL CLI. In the previous blog we have explained how to provision a new node to join the MySQL replication cluster. We … Continued
For ages MySQL was lacking an ability to provision new instances with data, at least for the community builds. Well, technically there always was mysqldump but let’s forget about using it on any kind of scale. It’s too slow to be used in most of the real world scenarios. Finally, Oracle added a ‘clone’ plugin … Continued
Today’s blog is a short but quite important one. As you might be aware, a new vulnerability has been identified in Apache Log4j, a Java library intended to create error logs in the applications. It has been assigned CVE CVE-2021-44228. The issue itself is quite serious, remote code execution through properly crafted log messages with … Continued
As we have discussed in one of previous blogs, Galera uses a concept of quorum to determine if a given node is a part of the cluster and can proceed with handling the traffic or is it partitioned and should cease any operations. We have briefly touched how the quorum is calculated but we haven’t … Continued