1.  Mathew George Sr. Software Engineer Microsoft Corporation ES23

6. North America EuropeAsiaSouth America Mean1433265.5 Std dev2843287.2 Min1.30.93.50.5 Max155 9225 Continental Bandwidth (Mb/s) North America EuropeAsia Mean108109163 Std dev699181 Min205 Max375372460 Continental Latencies (ms) Connectivity from branch offices to nearest data center, Fall 2007

7. Application Client Cache SMB Redirector Network SMB Server Server Cache Disk Filesystem Win32/NT File I/O APIs SMB Client Network Stack File Server

10. Application Client Cache SMB Redirector Network SMB Server Server Cache Disk Filesystem Win32/NT File I/O APIs SMB Client Network Stack File Server

11. Robocopy throughput comparison between Windows Server 2003 and Windows Server 2008 transferring a 4.5 GB file over a 1 Gbps WAN link. Pull = Copy from server to local disk Push = Copy from local disk to server

12. The effect of pipelining on network utilization IdleUtilized Non-pipelinedPipelined

18. CreateFile( GENERIC_READ | GENERIC_WRITE ) Granted batch oplock ReadFile CloseHandle ClientServer WriteFile Break Oplock Flush cached data CreateFile( GENERIC_READ ) WriteFile No more caching ! Create completes ReadFile completes. Data is cached. Close is not sent out on wire. CreateFile( GENERIC_READ | GENERIC_WRITE ) Cached handle is re-used. Data is written to cache. Cache is destroyed.

20. CreateFile( GENERIC_READ | GENERIC_WRITE ) Granted lease ReadFile CloseHandle ClientServer CreateFile( GENERIC_READ ) WriteFile Create completes ReadFile completes. Data is cached. Close is not sent out on wire. Cached handle is re-used. Data is written to cache. WriteFile

22. Windows 7 Server High latency Low-bandwidth WAN link Client 1Client 2 Windows 7 Clients First access to a file on the server pulls down the file over the slow WAN link (WAN access) Second access to the same file from another user in the branch is satisfied from the peer (local subnet access) Subsequent access from the same client is satisfied from the transparent cache (local machine access)

31. Evals & Recordings Please fill out your evaluation for this session at: This session will be available as a recording at: www.microsoftpdc.com

33. © 2008 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.