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Release Notes

This document provides the following information for Sun Grid Engine 6.2 Update 2 (SGE 6.2u2) software.

New Features

Sun Grid Engine 6.2 Update 2

The following are the new features in SGE 6.2u2:

GUI Installer

Sun Grid Engine 6.2u2 comes with a new GUI installer to simplify the installation process. The GUI installer enables you to easily install a whole cluster interactively. To install a cluster, you need to set up the environment in a similar way to an automatic installation.

For more information about the GUI Installer feature, see Installing the Software With the GUI Installer.

Microsoft Windows Vista Support

New support for 32-bit and 64-bit editions of Microsoft Windows Vista (Enterprise and Ultimate Edition), Windows Server 2003R2 and Windows Server 2008. SGE 6.2u2 opens new possibilities in integrating within the high scalability Sun Grid Engine Windows clusters as nodes.

For more information about the Microsoft Windows Vista Support feature, see Microsoft Subsystem for UNIX-based Applications.

Job Submission Verifier (JSV)

Job Submission Verifiers (JSVs) allow users and administrators to define rules that determine which jobs are allowed to enter into a cluster and which jobs should be rejected immediately. A JSV is a script or binary that can be used to verify, modify, or reject a job during the time of job submission or on the master host.

For more information about the JSV feature, see Using Job Submission Verifiers.

Consumable Resources Per Job

Consumable complex attributes can now be configured as per job. Such consumables are consumed as requested and are no longer multiplied by the requested slots. This makes resource requests for parallel jobs much easier to define, especially when using slot ranges.

For more information about the Consumable Resources Per Job feature, see Multiplied Resource Requests Versus Non-Multiplied Resource Requests.

jemalloc Library

Linux distributions (x64 platforms) come with a default memory allocator library which is not as efficient as the open source jemalloc memory allocator library also used by the Firefox browser. SGE 6.2 Update 2 replaces the native Linux malloc library with the jemalloc library. This has a positive effect on the master host performance in large and high throughput Sun Grid Engine clusters on Linux and reduces the memory footprint up to 20%. This will lead to a significant performance increase.

Sun Grid Engine 6.2

The following are the new features in SGE 6.2:

Supported Platforms and Patches

Sun Grid Engine 6.2 Update 2

For information about the supported platforms and patches for SGE 6.2u2, see Patch Matrix.

Sun Grid Engine 6.2

The following are the supported platforms and patches for SGE 6.2:

Known Issues and Limitations

Sun Grid Engine 6.2 Update 2

The following are the known issues and limitations of SGE 6.2u2:

GUI Installer

For information about the GUI Installer issues and limitations, see Troubleshooting the GUI Installer.

Microsoft Windows Vista Display Issue

While Microsoft Windows Vista (Enterprise and Ultimate) and Windows Server 2008 are generally supported with SGE 6.2u2, it is not possible to fully use the display_win_gui feature with this SGE version on these Windows systems. This feature allows a SGE job to request the display_win_gui complex variable, which causes the GUI of the job to be displayed on the currently visible Desktop on the Windows host. This works only if the job is a native Windows application.

In fact, it is still possible to request the display_win_gui complex variable and the job will be started on the Windows execution host, but the GUI will not be displayed on the visible Desktop, it will be displayed on an invisible background Desktop. This still might be enough to let many applications run flawlessly, as they are started in the native Windows environment.

The reason for this issue is that Microsoft improved the security of the new Windows versions. Now all services are forced to run in a separate login session - they ran in the same session as the currently logged on user in earlier Windows versions. And as it is not possible to directly access a Desktop running in one session from a program running in another session, SGE cannot provide this function any more.

DRMAA Client Core Dump

DRMAA clients might core dump if they are used in combination with client JSV scripts. If an application using a DRMAA library is used in combination with a client JSV script, this application might terminate abnormally. If it does not terminate, the information for the OWNER and GROUP of the pseudo job parameter that is passed to a client JSV is incorrect and cannot be used. To workaround this problem, remove all client JSVs and define only a server JSV. The information within the server JSV will be correct.

Sun Grid Engine 6.2

The following are the known issues and limitations of SGE 6.2:

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