Dell DX6000G Release Notes - Page 4

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Chapter 1. Version 2.6.1

1.1. Introduction

DX Storage Cluster File Server (CFS) is a native DX Storage application that presents a DX Storage

storage cluster as a standard Linux file system, enabling software that uses a file system to store

into DX Storage. These release notes contain late-breaking information about DX Storage Cluster

File Server 2.6.

1.2. Changes in Release 2.6.1

This release enhances and extends the previous major release of DX Storage Cluster File Server in

the following ways:

• An issue that could cause CFS to become unresponsive under stress conditions has been

resolved.

This release enhanced and extended the previous major release of DX Storage Cluster File Server

in the following ways:

• Memory management has been optimized to be more efficient.

• CFS now supports migration of a 1.2.x MySQL database to CNS. Please contact your support

resource for migration instructions.

• CNS now imposes max limits for items (both files/sub-folders) per folder (default 100K), file

attributes per file (default 50K) and links per file (default 10K). These limits make the software

more resilient in extreme use cases like when connectivity to DX Storage is lost for an extended

period of time. If the limits are exceeded the addition of new attributes, links or folder items will be

prevented and the CNS log will show errors that include the phrase CNS_TOOMANY.

• A timeout on an open SCSP connection to a DX Storage node has been added with a default of

10 seconds to prevent namespace hangs if the DX Storage should not respond for any reason

within the timeout window.

1.4. Previous Changes in Release 2.5

This release enhanced and extended the previous major release of DX Storage Cluster File Server

in the following ways:

• The timescape feature supported in previous versions of CFS is now supported in version 2.5.

Timescapes provide continuous snapshot functionality, allowing an administrator to mount a

historic, read-only view of a file system at any past time and view and/or copy previous versions of

files.

• CFS now runs on Red Hat Enterprise Linux 6.0. CFS is not compatible with older versions of

RHEL as they do not contain the required kernel and library versions.

The previous Ubuntu-based packaging is no longer available with version 2.5 and all future

versions but will continue to be supported with version 2.0 for the duration of your support terms.

• Several command-line support tools have been added to allow reporting and management of CFS

configuration and data. Please reference the 'Support and Management Utilities' section of the

Setup and Configuration Guide for complete details.

Version 2.6.1

March 2011