1. Rise Above The
CLOUD
Storage features
Transform your Hosting Business
03/05/2012 David De Vos
Research Engineer

2. Storage Spaces
Cluster Shared Volumes
File System Availability
Demo: Scale-out file server cluster

3. Storage Spaces

4. What are storage spaces ?
Windows 2012 introduces new storage options.
Storage Spaces are a cost-effective storage
virtualization platform that provides the
capabilities required for business-critical
storage.
4

5. Physical layer of storage spaces
Direct-Attached Shared – Availability & Scale
SATA or SAS Shared SAS
OR
5

6. Storage Pools vs Spaces
Storage Pools : Units of Aggregation, Administration & Isolation
Storage Spaces : Resiliency, Provisioning & Performance
Windows Storage Storage Storage
virtualized Spaces Spaces Spaces
storage
Storage Pool Storage Pool Storage Pool
(Shared) SAS or SATA or USB
Physical
storage
6

7. Redundant storage
• Mirrored and Parity Spaces with integrated journaling
• Rapid Recovery per pool hot spare support
• Application driven intelligent error correction
Resilient Spaces Mirrored Parity Mirrored Mirrored Parity Mirrored Mirrored Parity
contained within a Pool Space Space Space Space Space Space Space Space
Industry standard
physical storage
Hot Spare
7

8. Cost effective : ONE MILLION IOPS
Dell® Server
Configuration
5x LSI ® HBAs Components Quantity
Dell® PowerEdge® T710 1
2x Intel® Xeon® X5570, 48GB
memory, 5x LSI® 9205-8e SAS
HBA
StarTech® 4x 2.5” SATA 10
Enclosure Bay
Intel® X25-M 160GB SSD 40
JBOD
Enclosure
40x Intel®
SSDs
8

9. Cost effective : 80 TB highly available storage
Configuration
Node #1
Finance Components Quantity
[SFSDemo3] VM Supermicro® 2U server 2
2x Intel® Xeon® X5570, 12GB
memory, LSI 9200-8e SAS
VHDStore HBA
Node #2
[SFSDemo2] VM
Supermicro® 4U JBOD 1
Seagate® 2TB 3.5” 42
.VMLibrary near-line SAS HDDs
Supermicro®
4U JBOD
9

10. Cluster Shared Volumes

11. • CSV is a clustered file system in Windows Server 2012
- Enables all servers in a Cluster to access a common volume
- Provides a layer of abstraction above NTFS
• Provides complete abstraction with respect to which
nodes actually own a LUN
• Applications can failover without
requiring drive ownership changes
- No dismounting and remounting of volumes
- FAST failover within a cluster
11

12. Moving forward …
vNext+
Windows • Shared Storage
Server 2012 model for
everyone?
• More workloads
Win2008 R2 starting with file
services
• Support for
first workload
with Hyper-V
12

13. CSV 2.0 motivations and targets
• More workloads and applications
- File Server in addition to Hyper-V
• Improved Backup / Restore
• Improved performance
- Block Level I/O redirection
- Direct I/O for more scenarios
- SMB direct (SMB over RDMA)
• Support for Storage Spaces
• Multi-subnet support
13

14. I/O fault tolerance
• CSV transparently handles node, network, and HBA failures
• CSV proxy file system (CSVFS) virtualizes file objects
When a node failure occurs:
- Cluster service notifies remaining nodes to re-set their SMB
connections for all volumes which were owned by the failing node
- Filter driver holds all I/O requests for “orphaned” CSV volumes until
the volumes are remounted on other nodes
- Filter driver reopens files and remaps “virtual” handles to real ones
Failover is transparent to applications!
14

15. File System Availability

16. New file system check & repair: Execution Flow
Detect Corruption Online Online Self-
Verification Healing
• NTFS detects a • NTFS will validate • If not transient,
perceived anomaly whether issue is NTFS will attempt to
in file system transient or genuine rapidly self-heal
metadata • Volume remains • Volume remains
online online
Identify & Log Precise & Rapid Correction
• NTFS will identify and log • At the next maintenance window,
corrective actions for issues that volume can be taken offline and
logged corruptions are corrected in
could not be self-healed seconds
• Volume remains online • With CSV I/O is transparently paused
• Administrator will be notified for rapid correction and subsequently
automatically resumed.
16

17. From Hours to Seconds …
• Disk scanning process <3 sec of downtime
separated from repair process 400
350
300
•
Minutes
250
Online volume scanning 200
- Volume offline only to repair 150 Windows
100 Server
- Based on number of errors to fix 2008 R2
50
rather than size of volume
0
100 200 300
• Zero offline time with CSV
MillionMillionMillion
Files Files Files
17

18. How it works on Cluster Shared Volumes
• Chkdsk /Spotfix can seamlessly run on CSV volumes
- Normally Spotfix is an Offline operation
• Spotfix processing on a CSV volume:
- Every minute IsAlive health check runs, cluster checks if Chkdsk /Spotfix is required
- Clustering enumerates NTFS $corrupt to identify corrupt files
- CSV namespace is paused to CSVFS file system
- Underlying NTFS volume is dismounted
- Spotfix is run against corrupted files for a maximum of 15 seconds
- If all $corrupt records have not been processed in the 15 seconds, the health check
will wait 3 minutes before continuing the remaining spotfixes
- If corruption is too large, spotfix is not run and marked to run at next Physical Disk
online
18

19. Scale-out file server demo

20. Transform your Hosting Business
© 2011 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market
conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT
MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.