Dell VNX8000 VNX Series: Introduction to SMB 3.0 Support
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- Dell VNX8000 | VNX Series: Introduction to SMB 3.0 Support - Page 1
Abstract This white paper introduces the Server Message Block (SMB) 3.0 support available on the EMC® VNX™ and the advantages gained over the previous SMB versions. A VNX system can be implemented in a Microsoft® Windows® environment (with Microsoft - Dell VNX8000 | VNX Series: Introduction to SMB 3.0 Support - Page 2
and/or other jurisdictions. All other trademarks used herein are the property of their respective owners. Part Number H11427.6 EMC VNX Series: Introduction to SMB 3.0 Support 2 - Dell VNX8000 | VNX Series: Introduction to SMB 3.0 Support - Page 3
Directory Lease...14 Offload Copy ...16 BranchCache V2...18 SMB Encryption ...18 Encryption settings...19 Encryption keys ...20 Enabling encryption...20 Remote Volume Shadow Copy Service 21 Large IO ...23 Conclusion ...23 References ...23 EMC VNX Series: Introduction to SMB - Dell VNX8000 | VNX Series: Introduction to SMB 3.0 Support - Page 4
CIFS) protocol that the Microsoft Windows operating system uses for distributing file sharing, printing, and communication services from a server over a network. SMB 3.0 is supported with Microsoft Windows 8 and Microsoft Windows Server 2012 systems and has significant improvements over the previous - Dell VNX8000 | VNX Series: Introduction to SMB 3.0 Support - Page 5
and employees who want to understand the SMB 3.0 protocol support of VNX. Readers of this document should be familiar with -in-time copy created through Microsoft Volume Shadow Copy Service (VSS). VSS identifies each shadow copy by a 16-byte GUID (Globally Unique Identifier). • Share - Directory on - Dell VNX8000 | VNX Series: Introduction to SMB 3.0 Support - Page 6
• Volume Shadow Copy Service (VSS) - A Windows service and architecture that coordinates various SMB dialect must be negotiated. As shown in Table 1, the common dialect depends on the SMB version supported by both the client and DM. Table 1 SMB dialect used between Client and DM Client / DM - Dell VNX8000 | VNX Series: Introduction to SMB 3.0 Support - Page 7
a Data Mover failover occurs, the new primary Data Mover reads the metadata from disk before starting the CIFS service. The client will re-establish its session to the Data Mover and attempt to re-open its files and the application can remain online. EMC VNX Series: Introduction to SMB 3.0 Support 7 - Dell VNX8000 | VNX Series: Introduction to SMB 3.0 Support - Page 8
4. The Data Mover reads and restores the persistent open state from the disk before starting the CIFS service. 5. Using the persistent handle, the client re-establishes the connection to the same CIFS server and recovers files on the shares. EMC VNX Series: Introduction to SMB 3.0 Support 8 - Dell VNX8000 | VNX Series: Introduction to SMB 3.0 Support - Page 9
client level is to configure Windows clients in a cluster. In the previous SMB 2.x implementation, the problem with this scenario was that the server kept the handles of the clients with associated locks. Since the assumptions are that Windows Server EMC VNX Series: Introduction to SMB 3.0 Support 9 - Dell VNX8000 | VNX Series: Introduction to SMB 3.0 Support - Page 10
the smbca mount option as shown in Figure 5 Enabling CA on the file system. This is a CLI only procedure. EMC VNX Series: Introduction to SMB 3.0 Support 10 - Dell VNX8000 | VNX Series: Introduction to SMB 3.0 Support - Page 11
CA on a CIFS share Virtual Hard Disk (VHDX) in Shared Mode On systems running VNX File Operating Environment (OE) 8.1.9 or later, SMB 3.02 is supported. SMB 3.02 delivers the sharing of virtual hard disk (VHDX) files across nodes in a Hyper-V cluster. Utilizing VHDX in Shared Mode requires SMB 3.02 - Dell VNX8000 | VNX Series: Introduction to SMB 3.0 Support - Page 12
server on the Data Mover remains established until the last TCP connection is terminated. Multichannel provides several benefits, including: EMC VNX Series: Introduction to SMB 3.0 Support 12 - Dell VNX8000 | VNX Series: Introduction to SMB 3.0 Support - Page 13
to improve bandwidth. If the network interface controller (NIC) supports Receive Side Scaling (RSS), multiple TCP connections can be opened load balanced across multiple CPU cores. Multiple RSS NICs can be used to support multiple TCP connections on each NIC for a single SMB session. You can - Dell VNX8000 | VNX Series: Introduction to SMB 3.0 Support - Page 14
or deleted in the directory, the directory lease is broken. The next directory list request will be serviced by the CIFS server, instead of from the directory cache, with the latest changes. There are three and can be granted to multiple clients EMC VNX Series: Introduction to SMB 3.0 Support 14 - Dell VNX8000 | VNX Series: Introduction to SMB 3.0 Support - Page 15
notified that its cached directory content is no longer up-to-date, and sends a query to update that directory. EMC VNX Series: Introduction to SMB 3.0 Support 15 - Dell VNX8000 | VNX Series: Introduction to SMB 3.0 Support - Page 16
the Storage Processor to be written. 7. The Storage Processor acknowledges the Data Mover. 8. The Data Mover acknowledges the client. EMC VNX Series: Introduction to SMB 3.0 Support 16 - Dell VNX8000 | VNX Series: Introduction to SMB 3.0 Support - Page 17
elimination of reading and writing data across the network. The host CPU usage and network bandwidth required is reduced. EMC VNX Series: Introduction to SMB 3.0 Support 17 - Dell VNX8000 | VNX Series: Introduction to SMB 3.0 Support - Page 18
the particular share, and encryption is enforced when that share is accessed. Optionally, encryption can be enforced at the EMC VNX Series: Introduction to SMB 3.0 Support 18 - Dell VNX8000 | VNX Series: Introduction to SMB 3.0 Support - Page 19
, it is decrypted before it is saved to disk. Encryption settings To support the SMB 3.0 protocol, VNX has two new values added to the registry the parameters under HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\LanmanServer\Pa rameters as shown in Figure 12. EMC VNX Series: Introduction to - Dell VNX8000 | VNX Series: Introduction to SMB 3.0 Support - Page 20
=Encrypted export option as shown in Figure 13. This is a CLI only procedure. Figure 13 Enabling Encryption on a Share EMC VNX Series: Introduction to SMB 3.0 Support 20 - Dell VNX8000 | VNX Series: Introduction to SMB 3.0 Support - Page 21
snapshots of data stored on local volumes. With Windows Server 2012, Microsoft has extended this feature with Remote Volume Shadow Copy Service (RVSS). RVSS supports application backup across multiple file servers and shares. Backup applications that are VSS-aware can now perform snapshots of server - Dell VNX8000 | VNX Series: Introduction to SMB 3.0 Support - Page 22
Sales VM is taken, both the Marketing and Sales file systems are included in the snapshot taken by VNX. EMC VNX Series: Introduction to SMB 3.0 Support 22 - Dell VNX8000 | VNX Series: Introduction to SMB 3.0 Support - Page 23
IT infrastructure. This is especially important when organizations have remote offices across different regions of the world. You can utilize the VNX support of the SMB 3.0 protocol, along with Microsoft Windows 8 and Windows Server 2012, to address some common concerns. Continuous Availability and
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White Paper
Abstract
This white paper introduces the Server Message Block (SMB) 3.0
support available on the EMC
®
VNX
™
and the advantages gained
over the previous SMB versions. A VNX system can be
implemented in a Microsoft
®
Windows
®
environment (with
Microsoft Windows 8 and Windows Server 2012) to leverage the
enhancements in the SMB 3.0 protocol.
March 2016
EMC VNX Series: Introduction to SMB 3.0
Support