What’s new in VMware vSphere 4 @ Magirus – Day 2
Again I’m outlining my personal impressions of this update course’s 2nd day.
- – Networking (continued)
–> PWLAN support (enables private vlans, promiscuous / isolated / community) to separate VMs lying on the same vlan. In fact a vlan can be split up again into different PWLANs.
- – Nondisruptive Migration to Distributed Virtual Switches
–> Create new distributed switch, define uplinks, add first adapter to uplink, define port groups, remap VMs to new Port Groups (wizard driven), add second adapters to uplinks
- – Storage Management
–> Pluggable Storage Architecture allows 3rd Party Modules for failover / multipathing
–> iSCSI enhancements (bidirectional CHAP, reduced CPU overhead for swiSCSI, per target CHAP, swiSCSI no longer required Service Console
–> HBA Round Robin Multipathing is no more just experimental 🙂
–> Enhanced storage reporting, monitoring and alerting / triggering
–> Thin provisioning now within GUI (thin provisioning does not support fault tolerance!)
–> VMFS dynamic grow (if storage supports that)
–> Storage VMOTION supports change of provisioning mode when changing the Datastore (thick <> thin). SVMOTION now in GUI together with VMOTION (Migrate). SVMOTION works now without using snapshots. (creates a destination disks, copies content ->change block tracking ->, fast suspend/resume to switch to destination disk. SVMOTION works now with independent disks too (at least in the lab I saw it working)
–> Replica Management (Resignaturing) is now Datastore based (admin can choose to use the existing label for mirror LUNs)
–> Host Monitoring can be disabled (useful for maintenance on hosts or network infrastructure to prevent disrupts or side effects)
–> Specific Failoverhost can be configured
–> Percentage or Number value can be assigned to failover policy
–> VM Monitoring (checks vmware tools heartbeat). If a VM stucks in bluescreen, it gets restarted if configured so.
- Fault Tolerance
–> adds a secondary VM on another node (copies via vLockstep the whole state to the secondary VM)
–> a lot of requirements and limitations make this technology not useful for a lot of use cases (1vCPU, no snaps, no paravirtualized guests, etc, etc.)
–> requires dedicated vmknics on vmkernel PG)
–> requires SSL verification enabled on vCenter! This means every host incl. vCenter must have a valid and trusted cert installed!!
Saw today that RVTOOLS (http://www.robware.net/). RVTools is a small .NET 2.0 application which uses the VI SDK to display information about your virtual machines. Very useful.
A must is the following website: http://vsphere-land.com/