SME Best Practices
This chapter describes SME best practices. You can avoid problems when configuring SME if you observe the best practices described in this chapter.
Overview of Best Practices
Best practices are the recommended steps you should take to ensure the proper operation of SME. We recommend the following best practices for SME configurations:
- Maintain a consistent Cisco
NX-OS release across all your Cisco MDS switches.
- Refer to the
Planning For SME Installation
appendix for preconfiguration information and procedures.
- Enable system message
logging. For information on system messages, refer to the
Cisco MDS 9000 Family Troubleshooting Guide .
- Refer to the release notes for your Cisco SAN-OS or NX-OS release
for the latest features, limitations, and caveats.
SME Configuration Practices
Troubleshoot any new configuration changes after implementing the change.
Save all configuration changes on all switches in the cluster for correct cluster operation.
When designing your backup environment, consider that Cisco SAN-OS or NX-OS supports one cluster per switch.
All IT-nexuses that host paths between the server and storage must be added to the configuration or else the data integrity is at risk.
For configuration changes to SME tape groups, it is recommended that the backup application is quiesced during the configuration change.
Refer to the Cisco Storage Media Encryption Design Guide
for guidelines on sizing and placements of SME interfaces.
SME Disk and VAAI or Thin Provisioning Support
For the SME configuration, VAAI commands and thin provisioning are not supported.
The following VAAI commands are not supported by SME:
Compare and Swap
Compare and Write
As your data storage grows, the number of tape keys will also grow over time. This is especially the case when you select the unique key mode. It is a good practice to store only active keys in the Cisco KMC database.
To ensure redundancy and availability, it is important to back up your Cisco KMC database regularly.
The Cisco KMC listens for key updates and retrieves requests from switches on a TCP port. The default port is 8800; however, the port number can be modified in the smeserver.properties file.
Fabric Management Practices
Use DCNM-SAN and Device Manager to proactively manage your fabric and
detect possible problems before they become critical.