Transcript Overview new feature enhancements coming in Windows Server 2012 R2 for Failover Clustering and availability Roadmap of incremental changes from Windows Server.

Overview new feature enhancements coming in
Windows Server 2012 R2 for Failover Clustering and availability
Roadmap of incremental changes from Windows Server 2012
Guest Clustering with commodity storage
Cluster Shared Volumes (CSV)
on block storage
Scale-Out File Server
for file based storage
Sharing VHDX files provides shared storage
for Hyper-V Failover Clustering
Guest
Clustering
Maintains separation between infrastructure
and tenants
VM presented a shared virtual SAS disk
Appears as shared SAS disk to VM
Virtual SAS
Used for data disk only
VHDX
Block Storage
VHDX
File Based Storage
Windows Server
2012
Windows Server
2012 R2
Fibre Channel
P
P
iSCSI
P
P
File (SMB)
P
P
Shared VHDX
P
1
ShareVirtualDisk
2
ShareVirtualDisk
Technet
DrainOnShutdown
Still recommended to drain nodes before shutdown
Recommended
Technet
Component level VM network health detection
Health
Monitoring
Media sense loss detection of network disconnects
Live migrates VMs off hosts with no external
network connectivity for the VM
Verifies destination node has the network available
Recovery
Live migration
Configurable per network
Blog
SMB Client
\\SOFS\Share1
Share1
Share2
File Server 1
Technet
Scale-out File Server
\\SOFS\Share2
Share1
Share2
File Server 2
SMB Client
Node 1
Node 2
Technet
CSV cache supports allocating larger amounts of memory (up to 80% of
total memory)
Scalability
Most interesting for Scale-out File Servers
Physical Disk resource EnableBlockCache enabled by default
Still need to enable via BlockCacheSize to allocate memory
Defaults
Recommended to enable CSV Cache for all Hyper-V and
Scale-out File Server deployments
Recommended
Greater allocation for Scale-out File Server as they are not memory bound
Blog
Improved logging when creating a cluster and adding a node
Deployment
Logging
Enables pinpointing root cause quickly and easily
Increased logging to Operational channel for cluster resource state changes
For example: When cluster resources move from one node to another
State Logging
Displays on a per-node basis the CSV I/O mode and the reason if in a
redirected mode
Direct I/O, Block level redirected mode, File system level redirected mode
CSV State
Get-ClusterSharedVolumeState PowerShell cmdlet
ReFS
with CSV
Interoperability
Tiered
Spaces with
CSV
Spaces
Write-Back
Caching with
CSV
Parity Spaces
with CSV
Dedup
with CSV
Technet
Cluster Property
Default
Hyper-V Default
SameSubnetThreshold
5
10
CrossSubnetThreshold
5
20
Blog
TechEd 2013
Greater than 50% of nodes must acknowledge before considered committed
Toggled on by default for Hyper-V clusters
Majority
Enables the cluster to move forward if there is a node with latency
All nodes must acknowledge before considered committed
Default mode for all other workloads (SQL, Exchange, etc…)
All
Configurable with DatabaseReadWriteMode cluster common property
Update
Technet
Node
1/1
Node Node
1/1 1/1
Disk Witness
1/0
WitnessDynamicWeight
Always configure a witness with Windows Server 2012 R2
Clustering will determine when it is best to use the Witness
New
Recommendation
Configure Disk Witness if shared storage, otherwise FSW
LowerQuorumPriorityNodeID
Cluster
Site1
Site2
Cluster
Site1
Nodes Restarted
When Site2
partition detected
Site2
Manual Override
with ForceQuorum
New-Cluster –AdministrativeAccessPoint DNS
CNO
VCO
Technet
Role
Position
Notes
Not Supported
MSMQ stores properties in AD
File Server Clusters
Not Recommended
Kerberos for SMB preferred
Hyper-V Clusters
Not Recommended
No live migration support
Supported
Best fit if using SQL Authentication
MSMQ Clusters
SQL Server Clusters
SQL Server 2014 Failover Cluster Instance now supported on Windows Server 2012
R2 Cluster Shared Volumes (
)
Simplified storage management with consolidation of multiple instances onto a single LUN
Better capacity planning and storage utilization
Addresses drive letter limitations allowing more than 24 SQL instances on a single cluster
Consolidation
Availability
Databases can be moved without requiring any drive ownership changes
Faster Failover times with no dismounting and remounting of volumes required
Increased resiliency to storage faults with CSV I/O redirection
Chkdsk integration for file system correction with zero downtime
CSV block level read-only cache for unbuffered I/O to SQL databases
Performance
http://msdn.microsoft.com/en-us/library/jj870962.aspx
Azure
Azure
Private
30s, 5m, or 15m replication frequencies
Configurable
Replication
Frequencies
Variable Recovery Point Objective (RPO)
for metro vs. geographically dispersed
SiteC
Near site and offsite Replication
Multiple
Replica’s
Second hop can be equal to or greater
replication frequencies than first hop
Windows Azure Hyper-V Recovery
Manager (HRM) to manage datacenter
level failover
Management
Site-to-site failover management at scale
SiteB
SiteA
Technet
•
Recovery or Proactive based
remediation
Recovery – app restart, VM restart, failover, image
recovery based on failures
Proactive – migrate based on trends toward
service loss; workload close to exceeding capacity
•
Customizable recovery behavior
App or VM restart limit
In-guest remediation only - Enable/Disable App
Heartbeat
Turn off remediation during planned maintenance
- Enter/Exit Maintenance mode
Application Restart
Virtual Machine Restart
Virtual Machine Failover
Virtual Machine Migrate
Download the whitepaper at
http://www.symantec.com/connect/articles/download-new-whitepaper-applicationha-61-hyper-v
Guest Clusters with shared VHDX files
Flexibility
AD agnostic clusters without associated computer objects
NIC health detection and VM failover
Dynamic Witness and survival of simultaneous 50% node loss
Reliability
SMB isolated instances and Server Service health detection
CSV compatibility with Tiered Spaces, Parity Spaces, and Dedup
Interoperability
Windows IT Pro
Technet
For More Information
Windows Server 2012 R2
http://technet.microsoft.com/en-US/evalcenter/dn205286
System Center 2012 R2
http://technet.microsoft.com/en-US/evalcenter/dn205295
Azure Pack
http://www.microsoft.com/en-us/servercloud/products/windows-azure-pack
Microsoft Azure
http://azure.microsoft.com/en-us/
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