This post will be focussing specifically on working of CPU scheduler in Default, SCA v1 and SCA v2 modes in 6.7 U2 and later. VMware vSphere 6.7 U2 added new scheduler options (SCA v2) which provides security for L1TF vulnerability, while retaining as much performance as possible. Note: SCA is the abbreviation for Side Channel … Continue reading vSphere 6.7 U2 & later CPU Scheduler modes: Default, SCA v1 and SCA v2
In this post, we will discuss about using single or multiple vNICS on a VM and vmkernel networking CPU threads to optimize transmission rate of VM traffic. We can create a VM with single vNIC or multiple vNICs depending upon operational requirements. Using multiple vNICS on a VM could be for different types of traffic … Continue reading How to optimize Virtual machine vNIC transmit (Tx) performance?
Announcing the vSphere 7 Hands-on Labs VMware Hands-on Labs are hosted lab environments where anyone can try VMware products with no installation or experience required. Each lab is accompanied by a lab manual which guides the user through a set of exercises used to demonstrate product capabilities and use cases. VMware Hands-on [...] VMware Social … Continue reading Announcing the vSphere 7 Hands-on Labs
Hands-on with VMware Cloud Foundation 4.0 Hands-on with VMware Cloud Foundation 4.0 Since the launch of VMware Cloud Foundation 4.0 customers have been eager to get some hands-on time with this powerful hybrid cloud platform. In this blog, I want quickly to highlight two options for trying out VMware Cloud Foundation in a lab environment. … Continue reading Hands-on with VMware Cloud Foundation 4.0
This will be the last post in this series. In this post, we are going to discuss hypervisor swapping as next method after compression. ESXi employs hypervisor swapping to reclaim memory, if other memory reclamation techniques like ballooning, transparent page sharing, and memory compression are not sufficient to reclaim memory. Transparent Page Sharing (TPS) speed … Continue reading VMware vSphere 7.x Memory Reclamation-Part 6: Hypervisor Swapping
In this post, we are going to discuss about memory compression cache technique used by ESXi host. In previous posts we have already discussed TPS and ballooning. So compression is the next technique in order that gets initialized when ESXi host is under memory contention. ESXi provides a memory compression cache to improve virtual machine … Continue reading VMware vSphere 7.x Memory Reclamation-Part 5: Memory Compression Cache
After TPS in previous post, we will explore Ballooning reclamation technique in this post. Basically I am just following the order in which these techniques are initialized. Ballooning is a process where the hypervisor reclaims memory back from the virtual machine. Also if ballooning is started on an ESXi host, it indicates the beginning of … Continue reading VMware vSphere 7.x Memory Reclamation-Part 4: Ballooning
by Duncan Epping
Storage, Virtualization, Container Orchestration
Knowledge is meant to be shared. #VMware
