Dell DX6000G Release Notes page 7

• Maximum Network Connections CFS will support a maximum of 10000 open network
connections at any one time.
• Maximum File Name Length The maximum supported length for the name of a file in CFS is 255
characters. Attempting to create a filename that exceeds this length will result in an error that the
filename is too long.
• Temp Space Configuration A large spool space (> 200GB) is not necessary, and indeed can
hurt performance in some scenarios. The spool directory's file system should be configured with
enough space to keep a maximum of 100,000 files.
• Space Reporting When reporting file system capacity via a tool like 'df', CFS will under-report DX
Storage available capacity by 10% as a reserve for files currently in the spooling state.
• Dependent Service Restart after CFS Process Error The monitoring service that restarts DX
Storage CFS in the event of an error cannot restart other dependent services like NFS or Samba
as they may be in use by other applications. A restart of those services may be required to restore
full access to CFS.
• Conflicting Reads and Truncates Truncating a large file while it is being read can possibly result
in the last section of the read file containing null bytes to fill in the portion that was truncated.
• Samba Case Sensitivity By default Samba is case insensitive which can have a significant
impact on performance, particularly when storing a large number of files in a single directory.
Tuning the Samba parameters to support case sensitivity may provide performance
improvements but is not appropriate for all use cases. Please contact your technical account
manager for more information on the tradeoffs between performance and case sensitivity.
Copyright © 2011 Caringo, Inc.
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Version 2.6.1
March 2011