Is the virtual disk alignment process currently supported or will be supported for the Symantec Messaging Gateway Virtual Edition line of products?

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Article ID: 156721

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Updated On:

Products

Messaging Gateway

Issue/Introduction

Is the virtual disk alignment process currently supported or will be supported for the Symantec Messaging Gateway Virtual Edition line of products?  The issue as reported by a customer that if there is a lot of input/output-related (I/O) activity going on the customer's disk where the virtual edition appliances are provisioned, one possible solution is to perform a virtual disk alignment to get the I/O activity down and hence improve the performance of the customer's virtual environment on ESX or ESXi servers.

Resolution

This feature is currently not supported by the latest released version of the SMG appliance; nor it is currently scheduled on a roadmap for any future release of the product.  When new information is available, this article will be updated.  

A complete set of diagnostics is recommended to be collected and submitted to Symantec to ensure that there aren't any other factors that can contribute to the high I/O (i.e. frequent partial writes to the virtual appliance swap space on disk due to memory thrashing that may cause a higher than normal swap space utilization which can contribute to the overall performance of the customer's ESX or ESXi virtual environment).  Please make sure that the output of the "free" and "top" commands are included with the diagnostics ran several times a day for a few days during the normal SMG traffic and operation.

More information about this topic can be found here:

http://blogs.vmware.com/vsphere/2011/08/guest-os-partition-alignment.html

http://www.tcpdump.com/kb/virtualization/vmware-esx-server/vmware-disk-alignment/intro.html

http://www.tcpdump.com/kb/virtualization/vmware-esx-server/vmware-disk-alignment/vmfs-liux.html 

http://media.netapp.com/documents/tr-3747.pdf