Case Studies

Problem: A leading organization in the tech sector sought to optimize their database infrastructure by deploying MongoDB with a focus on scalability, security, and reliability. They required comprehensive guidance on deployment, load balancing, TLS implementation, role-based access control (RBAC), backup strategies, monitoring, and auditing to ensure a seamless transition to a production-ready environment. The client […]

Problem: The client requires Active Directory/LDAP integration for MongoDB user management similar to the Enterprise edition of MongoDB. This includes managing user permissions, creation, and deletion. Solution: To address the reported requirements, several potential solutions were put forth. Resolution 1. Utilize Percona MongoDB with LDAP Support: Implement LDAP support through Percona MongoDB. Conducted a Proof […]

Problem: The client has encountered an issue where a label, specifically “app_kubernetes_io_part_of”, is not being evaluated in the alert description or labels despite being present in the metric. They seek clarification on whether this behavior aligns with the expected functionality of Prometheus alerts. Process: The client provided a Prometheus rule with an alert definition that […]

Problem: The issue stems from confusion surrounding the Replication Factor (RF) in Apache Cassandra, where the documentation implies RF determines the quantity of data copies, but clarity on this matter is lacking. Process: To address this issue, in-depth investigation took place. The team explored the information provided by the client: Cassandra Configurations: Cassandra Version: 4.0.1 […]

Problem: The system is generating alerts indicating replication lag on a PostgreSQL instance. However, upon DBA investigation, no observable lag was found in the cluster, with both the leader and the synchronous standby reporting no lag. This discrepancy raises concerns about the persistence of alerts despite the absence of actual lag. Solution: Monitoring on Postgres: […]

Problem: The organization is using Cassandra 4.0.x in its Production environment and requires tracking login and logout details from the Cassandra Audit logs. However, the Audit logs only record LOGIN_SUCCESS, LOGIN_ERROR, and UNAUTHORIZED_ATTEMPT events, with no mention of LOGOUT events. The organization seeks clarification on mechanisms for capturing logout-related entries. Solution: Cassandra does not inherently […]

Problem: Ceph Storage Almost Full but Should Have Space. The client reported that the Ceph storage is nearly full, even though there should be sufficient space available. The output of ceph osd status indicates that some OSDs have limited available space. The most common cause identified is not deleting the lost+found directory after a crash […]

Problem: The client reported sudden high CPU utilization on their RHEL 7.5 Nexus server. Despite disabling tasks and restarting the server, the issue persisted. Logs indicated that the Nexus process was the top contributor to CPU utilization. Process: Steps and measures undertaken to investigate the issue: Requesting Information: Furnished JVM logs, Nexus application logs, and […]

Problem: Need Explanation for the Pipeline: Our client has encountered a scenario in their Elasticsearch setup that requires clarification and understanding. The specific concern revolves around the configuration of the Logstash pipeline, more precisely, the interaction between the defined schedule and query parameters. Logstash Configuration LogstashConfig: pipelines.yml: | - pipeline.id: logstash-output-broker schedule: "*/5 * * […]