Personal blog of Yzmir Ramirez

There are various ways to backup and restore Percona Server for MongoDB clusters when you run them on Kubernetes. Percona Operator for MongoDB utilizes Percona Backup for MongoDB (PBM) to take physical and logical backups, continuously upload oplogs to object storage, and maintain the backup lifecycle.  Cloud providers and various storage solutions provide the capability […]

Percona Backup for MongoDB (PBM) supports snapshot-based physical backups. This is made possible by the backup cursor functionality present in Percona Server for MongoDB.  The flow of snapshot-based physical backup consists of these stages: Preparing the database – done by PBM Taking the snapshots – done by the user/client app Completing the backup – done […]

MongoDB provides scalability and high availability at ease. If you already have a sharded cluster, you know for sure what the Balancer does. If you are not an experienced MongoDB user, the Balancer is one of the key components of a sharded cluster, and the main goal is to maintain the cluster balanced, moving chunks […]

MongoDB provides scalability and high availability at ease. If you already have a sharded cluster, you know for sure what the Balancer does. If you are not an experienced MongoDB user, the Balancer is one of the key components of a sharded cluster, and the main goal is to maintain the cluster balanced, moving chunks […]

Recently, one of our customers reported a problem after upgrading a sharded cluster from MongoDB 5.0 to 6.0. The upgrade of data-bearing nodes was fine, but in the final part of the process, where mongos routers needed to be restarted, the new version did not go well. This caused problems for the applications, where suddenly […]

Recently, one of our customers reported a problem after upgrading a sharded cluster from MongoDB 5.0 to 6.0. The upgrade of data-bearing nodes was fine, but in the final part of the process, where mongos routers needed to be restarted, the new version did not go well. This caused problems for the applications, where suddenly […]

Managing database users within complex CICD pipelines and GitOps workflows has long been a challenge for MongoDB deployments. With Percona Operator for MongoDB 1.17, we introduce a new feature, currently in technical preview, that streamlines this process. Now, you can create the database users you need directly within the operator, eliminating the need to wait […]

MongoDB high availability is essential to ensure reliability, customer satisfaction, and business resilience in an increasingly interconnected and always-on digital environment. Ensuring high availability for database systems introduces complexity, as databases are stateful applications. Adding a new operational node to a cluster can take hours or even days, depending on the dataset size. This is […]

I have always been wondering about performance regression when upgrading in MongoDB. From MongoDB v3.6, despite continuous improvement in the MongoDB feature development, the growing feature set has not included much, if anything in the way of performance improvements. At Percona, we always strive to boost the overall performance by looking into the customers’ environment […]

This article is, in fact, two topics merged into one publication. Both are related to anonymous statistical data collection within Percona releases of database engines: MySQL, MongoDB, and PostgreSQL. In the first part of this article, I will share some of our findings and observations and discuss the various conclusions we have drawn from them. […]