In OpenStack Juno release, L3 high availability in Neutron is implemented using Keepalived, which internally uses the VRRP protocol. It is an active/passive solution where a Keepalived instance is spawned in every router namespace and the instances communicate via a dedicated high-availability network, creating one per tenant. The IP addresses that are used in the… Continue reading IPv6 impact on Neutron L3 High Availability
Service high-availability is a core concern for any operator running, or intending to run, a production OpenStack cluster. Current “best practices” call for the deployment of a full cluster stack (generally Corosync + Pacemaker) and / or load-balancers (generally HAProxy) to manage service state and failover. While this is appropriate for a subset of OpenStack… Continue reading Providing OpenStack Service High-Availability Through Anycast Routing
In this how-to tutorial, we will look at implementing multi-node, multi-site SQL 2012 AlwaysOn Windows Server Failover Cluster (WSFC) with two Failover Cluster Instance (FCI) across two geographically dispersed datacenters for High Availability (HA) and Disaster Recovery (DR). I am currently working on a project where we’re going to upgrade from previous version of SQL… Continue reading How to setup Multi Site SQL 2012 AlwaysOn Cluster with Two FCIs Across Datacenters?
Hortonworks, a leading commercial vendor promoting the innovation, development and support of Apache Hadoop, today announced the availability of an enterprise-proven, high-availability (HA) solution for Hortonworks Data Platform (HDP) 1.0 that empowers operations teams deploying Hadoop on VMware vSphere® with an HA solution that is proven and readily available in the enterprise. Hortonworks and VMware… Continue reading Hortonworks Delivers Proven High-Availability Solution for Apache Hadoop
Systems Engineering, the largest independent and employee-owned IT provider in Maine, today announced the release of its new cloud computing application, SE Cloud. SE Cloud provides secure, scalable server access and data storage accessible on demand, 24 hours a day, 365 days per year. The application also includes proactive network management, 24×7 monitoring and high-availability.… Continue reading Systems Engineering Announces New Cloud Computing Application
Avoiding the Biggest HA & Distributed Resource Scheduler Config Mistakes (BCO3420)
Everyone thinks HA and DRS are wonderful technologies. Yet bot…
Vmware has relased Performance Best Practices for vSphere 5 and its available by clicking the download link below this short summary. This is a book designed to help system administrators obtain the best performance from vSphere deployments. VMware addressed many of the new features in vSphere 5.0 from a performance perspective. These include: Storage Distributed… Continue reading Performance Best Practices for VMware vSphere 5.0