Transcript Cluster Shared Volumes (CSV) in Windows Server 2012 Challenges managing large numbers of LUN’s Manageability Flexibility • Multi-path • Masking several LUN’s • LUN -

Cluster Shared Volumes (CSV) in Windows Server 2012
Challenges managing large numbers of LUN’s
Manageability
Flexibility
• Multi-path
• Masking several LUN’s
• LUN - smallest unit of failover
Capacity
Scalability
• Poor SAN space
utilization
• Complexity with drive letters
Windows Server 2008 R2
What it delivers
I/O synchronization overview
Metadata
Simultaneous read/write
access on all Cluster Nodes
Read/Write
Shared LUN
VHD
VHD
VHD
Shared
Storage
Server side metadata
synchronization
- Avoids I/O interruptions
Key Takeaways
Metadata updates - small operations, infrequent for VMs
Parallel metadata updates - non-disruptive for applications
Share
VM
VM
Share
Node 1
Share
Coordination Node
Node 2
VM
Node 3
CSVFS
CSV Proxy
File System
Server /
SMB
MUP/RDBS
S/SMB
CSV Proxy
File System
MUP/RDBS
S/SMB
CSV Proxy
File System
CSV File
System Filter
NTFS
CSV
VolumeMgr
CSV
VolumeMgr
Volume
Manager
CSV
VolumeMgr
LBFO/RDMA
Disk
Disk
Storage Connection Broken or
not present
Direct I/O
SAN
Configuring a CSV Disk
Consistent view across the cluster
Mount Points
CSV Resiliency
I/O Redirected
via network
VM running on Node 2 is
unaffected
Coordination
Node
SAN Connectivity
Failure
VHD
VM’s can then be live migrated to another
node with zero client downtime
New
Coordinator
Node
Node Failure
VM running
on Node 2 is
unaffected
Coordination
Node
Brief queuing of I/O while
volume ownership is
changed
Volume relocates to a
healthy node
VHD
Metadata Updates
Rerouted to
redundant network
VM running on Node
2 is unaffected
Volume mounted on
Node 1
Network Path
Connectivity Failure
VHD
Fault-Tolerant TCP connections make a path
failure seamless
Flexible storage choices for the private cloud
Accessing VHDs over SMB
Hyper-V Cluster
Single Logical Server (\\Foo\Share)
Single File System Namespace
Cluster Shared Volumes
File Server Cluster
From Hours to Seconds …
<3 sec of downtime
400
350
Minutes
300
250
Windows
Server 2008 R2
200
150
Windows
Server 2012
100
50
0
100
200
300
Million Million Million
Files
Files
Files
Improved CSV I/O Performance
CSV Optimizations
Direct I/O
Redirected I/O
• Block level I/O performance parity
• Remote file system (SMB) performance parity
High Performance fault condition I/O redirection
Share
Node 1
VM
Share
Coordination Node
VM
Node 2
CSVFS
Server /
SMB
CSV Proxy
File System
MUP/RDB
SS/SMB
CSV Proxy
File System
Avoids traversing file
system stack twice
CSV File
System Filter
NTFS
CSV
VolumeMgr
2x performance over File
Volume
Manager
CSV
VolumeMgr
System redirection
LBFO/RDMA
Disk
Storage
Connection Broken
or not present
Multiple levels of CSV I/O redirection
File level
redirected
File System
redirection
Block
redirection
• Redirection on a per file basis
• Opening file for shared access
• Volume redirection at top of CSV pseudo-file system stack
• Manually placing CSV in redirected mode
• Snapshot creation
• Volume redirection at bottom of CSV pseudo-file system stack
directly to bottom on coordinator
• Storage connectivity to volume lost
Node 1
Node 2
Node 3
Application
Application
SMB Server
Block Level
Redirected
IO
Application
CSVFS
Metadata
Or
Redirected
IO
MUP/ RDBSS/
RDR/SMB
Direct
IO
CSV Volume
Manager
Metadata
Or
Redirected
IO
Csv
Namespace
Filter
CsvFlt
NTFS
Block Level
Redirected
IO
Direct IO
System
Volume
Block Level
Redirected
IO
Physical Disk
Direct IO
Metadata
Or
Redirected
IO
CSVFS
NTFS
Direct
IO
Volume
CSV Volume
Manager
IO
Physical Disk
Volume
Mounted on
Node 2
Direct IO
MUP/ RDBSS/
RDR/SMB
Metadata
Or
Redirected
IO
CSVFS
Direct
IO
Block Level
Redirected
IO
CSV Volume
Manager
Inherit gains for CSV redirection performance
SQL TPC-C transactions/s
4270 (98%)
4315 (100%)
4500
4000
3500
3000
2500
2000
1175 (27%)
1500
1000
500
0
SMB
SMB +
DAS
SMB 3.0 integration
VM with I/O
being redirected
10.10.10.X
20.20.20.X
CSV Streaming I/O
Across Multiple
Networks
VHD
Coordinator
Node
CSV Redirected mode enhancement summary
Many Pieces Come Together for Radical Improvement
I/O redirection
needed less often
Improved SMB
performance ~2%
off block
Direct (RDMA)
CSV Block Level
Redirection
SMB multichannel
Deployment considerations
Deployment considerations
SMHV MMC Snap In
PowerShell CLI
Backup Node
SMHV Service (VSS Requester)
VSS Requester (no participation)
VSS Service
Hyper-V writer
Non Requestor Nodes
VSS Service
CSV writer
Hyper-V writer
CSV writer
CSV Providers
CSV Providers
Data ONTAP Hardware provider
Hardware provider (no participation)
VM1
“Host1”
Demosvr-01
VM3
VM4
VM2
CSV
VHD
VHD
VHD
Data ONTAP®
Single Windows
Volume
“Host2”
Demosvr-02
Key Takeaways
INFRASTRUCTURE
as a SERVICE
http://blogs.msdn.com/b/clustering/
http://social.technet.microsoft.com/Forums/en/
winserverClustering/
#TEWSV430
Hands-On Labs
DOWNLOAD
Windows Server
2012 Release
Candidate
DOWNLOAD
Microsoft System
Center 2012
Evaluation
microsoft.com/windowsserver
microsoft.com/systemcenter
http://europe.msteched.com
www.microsoft.com/learning
http://microsoft.com/technet
http://microsoft.com/msdn
http://europe.msteched.com/sessions