VMware takes advantage of many of the performance features from modern network adapters.
In this section, we are going to talk about two of them and they are:
- TCP checksum offload
- TCP segmentation offload
What to know when offloading checksum
by Prasenjit Sarkar, Christopher Kusek, Kevin Elder
vSphere High Performance Cookbook - Second Edition
- Preface
- CPU Performance Design
- Introduction
- Critical performance consideration - VMM scheduler
- CPU scheduler - processor topology/cache-aware
- Ready time - warning sign
- Spotting CPU overcommitment
- Fighting guest CPU saturation in SMP VMs
- Controlling CPU resources using resource settings
- What is most important to monitor in CPU performance
- CPU performance best practices
- Memory Performance Design
- Introduction
- Virtual memory reclamation techniques
- Monitoring a host-swapping activity
- Monitoring a host-ballooning activity
- Keeping memory free for VMkernel
- Key memory performance counters to monitor
- What counters not to use
- Identifying when memory is the problem
- Analyzing host and VM memory
- Memory performance best practices
- Introduction
- Virtual memory reclamation techniques
- Monitoring a host-swapping activity
- Monitoring a host-ballooning activity
- Keeping memory free for VMkernel
- Key memory performance counters to monitor
- What counters not to use
- Identifying when memory is the problem
- Analyzing host and VM memory
- Memory performance best practices
- Networking Performance Design
- Introduction
- Designing a vSphere Standard Switch for load balancing and failover
- Designing a vSphere Distributed Switch for load balancing and failover
- What to know when offloading checksum
- Selecting the correct virtual network adapter
- Improving performance through VMDirectPath I/O
- Improving performance through NetQueue
- Improving network performance using the SplitRx mode for multicast traffic
- Designing a multi-NIC vMotion
- Improving network performance using network I/O control
- Monitoring network capacity and performance matrix
- DRS, SDRS, and Resource Control Design
- Introduction
- Using DRS algorithm guidelines
- Using resource pool guidelines
- Avoiding the use of a resource pool as a folder structure
- Choosing the best SIOC latency threshold
- Using storage capability and policy-driven storage
- Anti-affinity rules in the SDRS cluster
- Avoiding the use of the SDRS I/O metric and array-based automatic tiering together
- Using VMware SIOC and array-based automatic tiering together
- vSphere Cluster Design
- Storage Performance Design
- Introduction
- Designing the host for a highly available and high-performance storage
- Designing a highly available and high-performance iSCSI SAN
- Designing a highly available and high-performance FC storage
- Performance impact of queuing on the storage array and host
- Factors that affect storage performance
- Using VAAI or VASA to boost storage performance
- Selecting the right VM disk type
- Monitoring command queuing
- Identifying a severely overloaded storage
- Setting up VVols
- Introduction to vSAN
- Health check for vSAN
- Designing vCenter on Windows for Best Performance
- Introduction
- Things to bear in mind while designing the vCenter platform
- Deploying Platform Services Controller
- Deploying the vCenter server components
- Designing vCenter server for redundancy
- Designing a highly available vCenter database
- vCenter database size and location affects performance
- Using vSphere 6.x Certificate Manager for certificates
- Designing vCenter server for Auto Deploy
- Designing VCSA for Best Performance
- Virtual Machine and Virtual Environment Performance Design
- Introduction
- Setting the right time in Guest OS
- Virtual NUMA considerations
- Choosing the SCSI controller for storage
- Impact of VM swap file placement
- Using large pages in VMs
- Guest OS networking considerations
- When you should or should not virtualize an application
- Measuring the environment's performance
- Performance Tools
What to know when offloading checksum
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