In this blog post, we’ll compare virtual columns in MySQL and MariaDB.
Virtual columns are one of my top features in MySQL 5.7: they can store a value that is derived from one or several other fields in the same table in a new field. It’s a very good way to build a functional index. […]
Unlike MySQL 5.6, where parallel replication can only be used when replicas have several schemas, MySQL 5.7 replicas can read binlog group commit information coming from the master to replicate transactions in parallel even when a single schema is used. Now the question is: how many replication threads should you use?
A simple benchmark
Let’s assume […]
After we announced that Percona offers support for RocksDB, we saw many people looking for more details about this storage engine. Here is a quick list of some of the most frequent questions we get.
Q: What is RocksDB?
A: Quoting the homepage of the project:
RocksDB is an embeddable persistent key-value store for fast storage. RocksDB can […]
I presented a talk at Percona Live Amsterdam a few weeks ago (simple recipes for your Galera cluster), and one of the topics was schema changes. I discussed the drawbacks and benefits of Total Order Isolation (TOI), Rolling Schema Upgrades (RSU) and pt-online-schema-change. One thing I forgot was online DDL from 5.6. Does it […]
Read moreSeveral reports we’re published in the news about how easy it is to access data stored in some NoSQL systems, including MongoDB. This is not surprising because security was rather relaxed in earlier versions of MongoDB . This post lists some of the common vulnerabilities in MongoDB and Percona TokuMX.
Network Security
One key point is […]
