What’s New in VMware vSphere 6.5 and Diffrence

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In high line new features include:


Improvements to vCenter Server 6.5
There are some new features that are only available on the vCenter Server Appliance. These include:
Addition of a Migration Tool — The vCenter Server 6.5 Installer has a built-in Migration Tool. This tool not only makes it easier to migrate from vCenter Server 5.5 or 6.0 to 6.5, but also makes it easier to migrate to the vCenter Server Appliance 6.5 without the need to manage a separate Windows server for vSphere Update Manager.
Improved Appliance Management — vCenter Server Appliance 6.5 exposes additional configuration data for CPU, memory, network, database statistics, disk space usage, and health data, reducing reliance on the command-line interface for simple monitoring and operational tasks.
vCenter Native High Availability — vCenter Server Appliance 6.5 provides a built-in ability to cluster itself for high availability.
Native Backup and Restore Functionality — This out-of-the-box feature allows users to back up vCenter Server and Platform Services Controller appliances directly. 
Transition to Web Client-only
Back in May of this year, VMware announced that the vSphere Client application (aka “fat client”) would be phased out in favor of the HTML5 web client (what, in the past, many called the “thin client”). vSphere 6.5 makes the next step in this transition — no vSphere client ships with version 6.5.
Improved host management
vSphere Update Manager — Generally viewed as the best way to keep ESXi hosts up to date, the vSphere Update Manager has been fully integrated into the vCenter Server appliance in 6.5.
Host Profiles — This feature was first introduced in vSphere 4, and has matured with each successive version. 6.5 adds improvements that make it easier to manage and verify profiles and offer more informative compliance checks.
Auto Deploy — Auto Deploy allows ESXi hosts to use industry-standard PXE technology to boot from the network rather than from local disks.
Enhancements to VMware Tools
Signed ISO Images — VMware Tools installers are distributed as ISO images that can be mounted to individual VMs to install or upgrade. ESXi 6.5 automatically verifies these OS images via their cryptographic signatures each time they’re read.
  • Tools Split for Current and Legacy OSes — VMware Tools 10.1 and future versions will be available for OEM-supported guest operating systems only. Guest OSes no longer supported by their vendors will be “frozen” at VMware Tools version 10.0.12. This frozen VMware Tools version will not receive future feature enhancements.
  • Improved Detection of Availability of Update Installers — vSphere 6.5 performs automatic checks for newer VMware Tools installation images. When found, VMs display an alert that an update is available
    • vRealize Operations Manager updated to 6.4
    vRealize Operations Manager 6.4 adds three new dashboards:
    • Operations Overview — This shows environment-based information such as inventory summary, cluster update, overall alert volume, and widgets displaying the top 15 VMs experiencing CPU contention, memory contention, and disk latency.
    • Capacity Overview — This shows capacity totals, capacity in use for the CPU count, and storage-based metrics.
    • Troubleshoot a VM — This enables a view of individual VM-based information such as its alerts, relationships, and metrics based on demand, contentions, parent cluster contention, and parent datastore latency.
    Enhancements to the API, specifically for developers and automation
    Key enhancements have been made across the application program interfaces (APIs) and command-line interfaces (CLIs) in vSphere 6.5 to simplify interactions for developers and automation, giving customers choice of access with language bindings and automation tools.
    Security enhancements (including VM-level encryption)
    Virtual Machine Encryption
    Encrypted vMotion
    Secure Boot Support
    Enhanced Logging
    Security Automation
    Improvements to VMware HA and DRS
    Proactive HA — Proactive HA integrates with select hardware partners to detect degraded components and evacuate VMs from affected hosts before an incident can cause an interruption of service.
    HA Orchestrated Restart — Orchestrated Restart improves the recoverability of applications that run across more than one VM.
    vSphere Fault Tolerance Improvements — In vSphere 6.5, Fault Tolerance (FT) integration with DRS has been improved to enable better placement decisions by ranking the hosts based on available network bandwidth and by recommending the datastore in which to to place the secondary VMDK files.
    Improved DRS Load Balancing Algorithm
    Network-Aware DRS
    Storage-related enhancements (including automated UNMAP)
    Support for Advanced Format Drives — The standard sector size for disk drives has been 512 bytes. In order to provide larger-capacity drives, the storage industry has been moving towards Advanced Format (AF) drives that use a larger physical sector size of 4,096 bytes (this is also referred to as “4K AF format”).
    Automated UNMAP — UNMAP is a VMware vSphere APIs for Array Integration (VAAI) primitive that enables the reclamation of dead or stranded space on thinly-provisioned VMFS volumes.
    LUN Scalability — vSphere 6.5 supports a maximum of 512 LUNs (up from 256 in 6.0) and 2,000 storage paths (up from 1,024 in 6.0).
    NFS v4.1 Support — While NFS v4.1 has been supported since vSphere 6.0, 6.5 adds a Kerberos integrity check (SEC_KRB5i) along with Kerberos authentication. NFS v4.1 with Kerberos is also supported with IPv6 in 6.5.
    Support for Software iSCSI Static Routing — In previous versions, using the software iSCSI initiator required that the initiator and the target be on the same subnet.
    Networking Enhancements
    Enhancements for Nested ESXi — Prior to vSphere 6.5, running nested ESXi instances (installing ESXi as the Guest OS on a VM) required enabling promiscuous mode on virtual switches, sending all traffic on the “outer” virtual switch to the nested ESXi instance, resulting in unnecessary packet deliveries, high CPU usage, and low network throughput.
    Dedicated Gateways for VMkernel Network Adapter
    ERSPAN Support — vSphere 6.5 adds support for the ERSPAN protocol. ERSPAN mirrors traffic from one or more source ports and delivers the mirrored traffic to one or more destination ports on another switch.
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    Key differences between vSphere 6.0 and vSphere 6.5. An overview comparison from all vSphere Versions is available here.
    For more detailed information, please click on the below link:
    https://www.vmware.com/content/dam/digitalmarketing/vmware/en/pdf/whitepaper/vsphere/vmw-white-paper-vsphr-whats-new-6-5.pdf

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