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MongoDB: High Availability Topology for a Multi-Region Setting
MongoDB high availability is essential to ensure reliability, customer satisfaction, and business resilience in an increasingly interconnected and always-on digital environment. Ensuring high...
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Simplify User Management with Percona Operator for MongoDB
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,...
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All UUID Functions in Percona Server for MySQL: RFC 9562 Implemented
The release of Percona Server for MySQL 8.4.0 includes the new UUID_VX component, which implements UUID versions 1, 3, 4, 5, 6, and 7 according to recently published RFC 9562. UUIDs (Universally Unique...
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MySQL 8.0 vs. 5.7: Are the Newer Versions More Problematic?
There has been much discussion recently about the stability and performance of the latest MySQL releases. Many database professionals are voicing concerns, especially after encountering several issues...
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Understanding MySQL Indexes: Types, Benefits, and Best Practices
When it comes to MySQL databases, performance is everything. As more activities move online and data volumes grow exponentially, ensuring efficient data retrieval and query execution becomes crucial....
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How Network Splits/Partitions Impact Group Replication in MySQL
In this blog post, we will explore how network partitions impact group replication and the way it detects and responds to failures. In case you haven’t checked out my previous blog post about group...
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Dealing with a ‘DatabaseVersion.timestamp’ Error After a MongoDB Upgrade
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...
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MongoDB: New Balancer Policy and Automerger
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...
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Percona Backup for MongoDB and Disk Snapshots in Google Cloud Platform
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...
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Percona Backup for MongoDB and Disk Snapshots in Google Cloud Platform – Part 2
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. In a previous post, we...
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Percona Backup for MongoDB and Disk Snapshots in Amazon AWS
We recently covered the use case of Percona Backup for MongoDB and Disk Snapshots in Google Cloud Platform; now it’s time to do the same for Amazon AWS. For this demo, I have created a 2-shard MongoDB...
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Migrate from Redis to Valkey Without Downtime
Migrating from Redis to Valkey can significantly reduce costs associated with private licensing for your application. However, the biggest concern in any migration is transitioning without disrupting...
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Percona Backup for MongoDB and Disk Snapshots in Amazon AWS – Part 2
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. In a previous post, we...
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Tracking Dual Passwords in MySQL
We already have blog posts about Dual Password in MySQL from Brian Sumpter – Using MySQL 8 Dual Passwords, and from Marco Tusa – MySQL Dual Passwords – How To Manage Them Programmatically Let’s skip...
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Valkey/Redis Key-Specific Dump, Restore, and Migration
Managing keys inside Valkey/Redis is crucial, especially when we need to test in a different environment or restore a partial/specific key-value dataset for a migration or production movement event....
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An Elephant in the Cluster: Making PostgreSQL Feel at Home on Kubernetes
TL;DR Kubernetes was built for stateless apps, but as more stateful applications (like databases) run on it, operators include quite heavy implementations to Kubernetes workload management API (such as...
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Alternatives to Cloud DBaaS: What to Look For
Originally published on The New Stack. Building a flexible cloud strategy means making decisions that align with operational efficiency, cost management, and scalability. Public cloud platforms offer...
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Exploring Kubernetes CPU Resources in View of Percona XtraDB Cluster’s Flow...
Even though I used a dedicated Kubernetes cluster to host my test database, I had this belief that by not explicitly allocating (or requesting, in Kubernetes vocabulary) CPU resources to my Percona...
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Checking Index Consistency on a Sharded Cluster in MongoDB
Inconsistent index distribution across shards in a MongoDB sharded cluster is more common than you think, and it occurs because the user creates indexes directly in the shards without using MongoS....
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Who Ate My MySQL Table Rows?
TL;DR ALTER TABLE and OPTIMIZE TABLE on an InnoDB table, which rebuilds the table without blocking concurrent changes to it (i.e., executed using INPLACE algorithm) and concurrent DML or purge activity...
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