The previous blog post showed how to restore an application that checkpointed itself using OpenJ9 CRIU Support in an unprivileged container. This blog post will go over how deploy these containers in Kubernetes (K8s) and OpenShift Container Platform (OCP). Prerequisites Kubernetes Clone the InstantOnStartupGuide repo Use an alias to for brevity. In line with K8s…
Overview The previous blog introduced using OpenJ9 CRIU Support. However, the application had to be run with elevated privileges. This blog outlines how to use OpenJ9 CRIU Support with minimal privileges. We have tested running a UBI8 container on RHEL 8.6 and a Ubuntu 22.04 container on Ubuntu 22.04 with the latest kernel updates (this…
In recent times, businesses have placed an emphasis on modernizing their software stack into cloud-based services. This transformation has generally meant breaking up big complex long running modules into much smaller short-lived units. These units are often packaged as containers and can be individually provisioned in worker nodes and scaled to meet demands. The days…
With the recent 0.32 release of Eclipse OpenJ9, the JITServer technology was officially released and made available for the Linux on IBM z System/LinuxONE platforms. This release also coincides with the recently launched IBM z16 technology. This blog will provide an overview of the JITServer technology and demonstrate some of its key benefits using the…
Open J9’s Balanced GC policy is a region based, generational collector, which aims to provide a bound on worst case pause times, by eliminating the need for frequent global garbage collections. A more detailed description of how Balanced GC policy works, along with some of its advantages over the Gencon GC policy, can be found…
