What is node eviction
This typically occurs during the communication failure between the instances, when the instance is not able to send heartbeat information to the control file, among other reasons, and when the node kills itself because it is unable to service the applications.May 9, 2007
What is the reason for pod eviction
The first pods to be evicted are those in a failed state, since they are not running but could still be using resources. After this, Kubernetes evaluates the running pods.Dec 16, 2021
What is POD eviction in Kubernetes
In Kubernetes, scheduling refers to ensuring that Pods are matched to Nodes so that the kubelet can run them.Apr 26, 2021. Eviction is the process of proactively terminating one or more Pods on resource-starved Nodes.
How do I check for eviction pods in Kubernetes
The results of the check will be saved in the nodes kubelet logs, which can be accessed by running cat /var/paas/sys/log/kubernetes/kubelet. log | grep -i Evicted -C3 to find the information.
What is the reason for node eviction in Oracle RAC
Starting in 11.2. 0.2 RAC or above (or if you are on Exadata), a node eviction may not actually reboot the machine. This is known as a rebootless restart. The goal of this node eviction is to maintain the overall health of the cluster by removing bad members.
What is OLR and OCR in RAC
In a nutshell, OCR is utilized by CRSd and OLR by the OHASd, respectively, and both are vital parts of a Grid Infrastructure that help manage the cluster resources.Jan 19, 2016
What is node fencing in Oracle RAC
To provide high availability, the cluster must be capable of taking corrective action when a node fails. In this case, SF Oracle RAC configures its components to reflect the altered membership. I/O fencing is a feature that prevents data corruption in the event of a communication breakdown in a cluster.
What is split brain syndrome in Oracle RAC
Split Brain is a term that is frequently used to describe the situation in which two or more nodes in a cluster lose connectivity with one another but continue to function independently of one another, including acquiring logical or physical resources, under the false assumption that the other process(es) are no longer active or
What is voting disk in Oracle RAC
In Oracle RAC 10g Release 2, these storage locations can be files in a shared file format like OCFS2, or they can be Linux configured raw storage or block Linux devices. The Voting Disk contains information to determine which nodes are active members of the cluster at any given moment.
What is heartbeat in Oracle RAC
The heartbeat is a type of polling mechanism that is sent over the cluster interconnect to ensure that all RAC nodes are available. The heartbeat is part of the clusterware node monitoring. It is a polling mechanism, similar to a ping, that monitors the availability of other servers in a RAC system.
How do I evict a pod in Nodejs
Before performing node maintenance (such as a kernel upgrade or hardware maintenance), you can safely evict all of your pods from a node using kubectl drain. Safe evictions allow the pods containers to gracefully terminate and will respect the PodDisruptionBudgets you have specified.
Do evicted pods consume resources
Pods in a failed state are the first to be removed because they are not running but may still be using resources. Kubernetes then examines the running pods. This process results in a node pressure as a result of the removal of pods due to resource limitations, such as memory or disk space, as we have mentioned above.
How does Oracle RAC startup sequence
1) INIT: INIT is the very first file to be checked to be started at the time of the operating system boot; it is the system and service manager for Linux, Aix, or any other Linux flavor, and it manages services through scripts that are stored in the /etc/init. d directory.Jun 1, 2021
Why are there odd numbers on voting disks
Oracle expects you to configure at least 3 voting disks for redundancy purposes; however, you should always configure an odd number of voting disks greater than 3. This is because losing more than half of your voting disks will result in the failure of the entire cluster.
What happens when a pod is evicted
The first pods to be evicted are those in a failed state, since they are not running but could still be using resources. After this, Kubernetes evaluates the running pods.Dec 16, 2021
Which background process is responsible for node eviction
In almost all platforms, there are two RAC processes that are essentially responsible for determining node evictions and who will initiate them: 1. OCSSD, which runs as the Oracle user and is primarily in charge of instance endpoint recovery and inter-node health monitoring
What is Imagefs
You can use the command Ive shared with you to check the default eviction threshold for imagefs, which is an optional filesystem used by container runtimes to store container images and container writable layers.Nov 8, 2021
What is split brain in RAC
Split Brain is a term that is frequently used to describe the situation in which two or more nodes in a cluster lose connectivity with one another but continue to function independently of one another, including acquiring logical or physical resources, under the false assumption that the other process(es) are no longer active or