Optimizing CIFS SMB1

CIFS SMB1 optimization performs latency and SDR optimizations on SMB1 traffic. Without this feature, SteelHeads perform only SDR optimization without improving CIFS latency.

You must restart the client SteelHead optimization service after enabling SMB1 latency optimization.

Under Settings, these configuration options are available:

Prewarms the RiOS data store. In this setup, the primary interface of the SteelHead acts as a client and prerequests data from the share you want to use to warm the data store. This request goes through the LAN interface to the WAN interface out to the server-side SteelHead, causing the in-path interface to see the data as a normal client request.

When data is requested again by a client on the local LAN, RiOS sends only new or modified data over the WAN, dramatically increasing the rate of data transfers.

Opens port 8777 to allow manual warming of the RiOS data store using the Riverbed Copy Utility (RCU) to prepopulate your shares. Most environments don’t need to enable RCU.

If you enabled print optimization, you must restart the optimization service.

On the client-side appliance, under Overlapping Open Optimization (Advanced), these configuration options are available:

Enables overlapping opens to obtain better performance with applications that perform multiple opens on the same file (for example, CAD applications). By default, this setting is disabled. Enable this setting on the client-side SteelHead.

With overlapping opens enabled, the SteelHead optimizes data where exclusive access is available (in other words, when locks are granted). When an oplock is not available, the SteelHead doesn’t perform application-level latency optimizations but still performs SDR and compression on the data as well as TCP optimizations.

If a remote user opens a file that is optimized using the overlapping opens feature and a second user opens the same file, they might receive an error if the file fails to go through a SteelHead (for example, certain applications that are sent over the LAN). If this occurs, disable overlapping opens for those applications.

Use the radio buttons to set either an include list or exclude list of file types subject to overlapping open optimization.

Specifies a list of extensions you want to include in overlapping open optimization.

Specifies a list of extensions you don’t want to include. For example, specify any file extensions that Enable Applock Optimization is being used for.

After you apply your settings, you can verify whether changes have had the desired effect by reviewing related reports. When you have verified appropriate changes, you can write the active configuration that is stored in memory to the active configuration file (or you can save it as any filename you choose).