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Monthly Archives: August 2018

Persistent Memory Performance in vSphere 6.7

We published a paper that shows how VMware is helping advance PMEM technology by driving the virtualization enhancements in vSphere 6.7. The paper gives a detailed performance analysis of using PMEM technology on vSphere using various workloads and scenarios.

These are the key points that we cover in this white paper:

  • We explain how PMEM can be configured and used in a vSphere environment.
  • We show how applications with different characteristics can take advantage of PMEM in vSphere. Below are some of the use-cases:
    • How PMEM device limits can be achieved under vSphere with little to no overhead of virtualization. We show virtual-to-native ratio along with raw bandwidth and latency numbers from fio, an I/O microbenchmark.
    • How traditional relational databases like Oracle can benefit from using PMEM in vSphere.
    • How scaling-out VMs in vSphere can benefit from PMEM. We used Sysbench with MySQL to show such benefits.
    • How modifying applications (PMEM-aware) can get the best performance out of PMEM. We show performance data from such applications, e.g., an OLTP database like SQL Server and an in-memory database like Redis.
    • Using vMotion to migrate VMs with PMEM which is a host-local device just like NVMe SSDs. We also characterize in detail, vMotion performance of VMs with PMEM.
  • We outline some best practices on how to get the most out of PMEM in vSphere.

Read the full paper here.

Performance Best Practices Guide for vSphere 6.7

We are pleased to announce the availability of Performance Best Practices for VMware vSphere 6.7. This is a comprehensive book designed to help system administrators obtain the best performance from their vSphere 6.7 deployments.

The book covers new features as well as updating and expanding on many of the topics covered in previous versions.

These include:

  • Hardware-assisted virtualization
  • Storage hardware considerations
  • Network hardware considerations
  • Memory page sharing
  • Getting the best performance with iSCSI and NFS storage
  • Getting the best performance from NVMe drives
  • vSphere virtual machine encryption recommendations
  • Running storage latency-sensitive workloads
  • Network I/O Control (NetIOC)
  • DirectPath I/O
  • Running network latency-sensitive workloads
  • Microsoft Virtualization-Based Security (VBS)
  • CPU Hot Add
  • 4KB native drives
  • Selecting virtual network adapters
  • The vSphere HTML5 Client
  • vSphere web client configuration
  • Pair-wise balancing in DRS-enabled clusters
  • VMware vSphere update manager
  • VMware vSAN performance

The book can be found here.

Also, for a summary of the new performance-related features in vSphere 6.7, refer to What’s New in Performance.