One of the big features of ILM "2" RC are the changes we have made to the portal and server to enable ILM to scale higher. In the portal and in the ILM service we've tuned, and jiggered with the way we interact with SQL and on the wire to make the ILM experience faster and snappier. Out of this, we've both gotten a better idea of what it takes to deploy ILM in such a way to maximize performance as well as key pieces of knowledge to help administrators keep their deployment running zipper quick. I will be writing a series of posts outlining much of this knowledge over the coming days.
SQL is where performance starts and ends in the ILM Service. It is critical to having ILM perform at enterprise scales that SQL is setup such that it can best serve the ILM application. You may wonder why we took the hard dependency on SQL Server 2008 in RC, and the answer is more than it's snappy new logo. SQL Server 2008 introduces a new feature called Filtered Indices which specifically aims to limit index pollution as well improve queries across sparse columns by selectively including values within specified indices. ILM weakly-typed, single-table based storage mechanism begs for the usage of this new capability and we did it. If you only have 1000 objects in your ILM store, well then this isnt much of a deal, but when you start scaling into the 50k+ arena, filtered indices come into their own.
Beyond this, deploying ILM requires a steady eye towards maintaining and monitoring ILM performance. Here are couple of tips off hand which should help you keep ILM screaming:
The ILM Service itself is actually quite lightweight and very much dependent on the performance of SQL. To help streamline the service further you can try:
That's all for now. Look for some further posts talking about other ways to monitor and manage ILM performance.
In the meantime, we are currently at Tech Ed Europe in Barcelona. You can come find me, or Nima, at the ILM booth located in the main exhibition area for the next couple of days. I will be running an Instructor Led Lab on ILM on Thursday at 1pm.
If you get a chance, I definitely recommend attending one of the many ILM sessions being done over the next couple of days:
Thursday: Identity Lifecycle Manager 2 (Part 3): Extensibility and provisioning with ILM 2 (Nima GanjeH)
Wednesday: Identity Lifecycle Manager 2 (Part 2): Expressing and enforcing business policy (Alex Weinert)