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Qualifying Your XML Gateway Horsepower

The XML Gateway community is not immune to this indulgence

Often in our tech industry there is a penchant to spout off performance numbers without qualifying the metrics and conditions under which these numbers are derived.

The XML Gateway community is not immune to this indulgence. I have to admit, even I am guilty of committing this sin sometimes.

In the XML Gateway world, performance cannot simply be defined in terms of transactions per second (TPS) due to complexity of a message transaction and the task policy of the gateway.

As a result, XML Gateways today always specify a specific task (i.e XML transformation, WS-Encryption) and the associated TPS.

However, this type of metric still falls short of fully expressing the true performance metric of a SOA Gateway. For example, a common task that is staple of every XML Gateway is schema validation.

This task validates the the structure of incoming and outgoing SOAP/XML messages. The performance of a XML Gateway when performing validation is often expressed in terms of Schema Validation TPS.

This is simply not sufficient. Further qualifiers that should be applied to schema validation performance numbers are as follows:

  • What is the size of the message?
  • What transport protocol (HTTP 1.0, HTTP 1.1, MQ etc) was used to derive the numbers?
  • Was the deployment in proxy mode or was it in service mode?
  • How many clients were used in generation of load?
  • Was the validation task performed on both inbound and out bond messages?
  • How complex was the message structure and its associated schema (i.e n-dimensional arrays, abstract types).

The last bullet is a real challenge and it really affects the validation performance of a gateway.

Unless, these qualifiers are resolved, the numbers are subjective at best.

Maybe one day we will learn some lessons from the automotive industry to really define a true metric in defining performance of each task in a XML Gateway.

Read the original blog entry...

More Stories By Rizwan Mallal

Rizwan Mallal serves as the Vice President of Operations at Crosscheck Networks, Inc. As a founding member and Chief Security Architect of Forum Systems, the wholly owned subsidiary of Crosscheck Networks, Rizwan was responsible for all security related aspects of Forum's technology.

Previously, Rizwan was the Chief Architect at Phobos where he was responsible for developing the industry's first embedded SSL offloader. This product triggered Phobos's acquisition by Sonicwall (NASD: SNWL). Before joining Phobos, he was member of the core engineering group at Raptor Systems which pioneered the Firewall/VPN space. Raptor after its successful IPO was later acquired by Axent/Symantec (NASD:SYMC).

Rizwan started his career at Cambridge Technology Partners (acquired by Novell) where he was the technical lead in the client/server group.

Rizwan holds two patents in the area of XML Security. Rizwan has a BSc. in Computer Science from Albright College and MSc. in Computer Science from University of Vermont.

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