Lee LaFrese is a Senior Storage Performance Consultant at IntelliMagic. He has deep knowledge about z/OS and SAN storage architecture and is a recognized industry expert in storage performance modeling. His focus at IntelliMagic is to investigate thorny performance issues that customers may face and recommend practical solutions. He also shows customers how to use our products effectively, assists with capacity planning and works with developers to identify and implement new, high-value features and functions.
Lee is a frequent conference speaker and has written several entertaining blogs about storage performance. He holds eight storage related patents and before joining IntelliMagic he had a 30+ year career at IBM where he was the technical team lead for Enterprise Storage Performance.
Resources created by Lee LaFrese
Clogged Device Drain? Use Your Data Snake!
Have you ever run into high I/O response times that simply defy explanation and can’t find a reason why performance is degraded. It could be a classic “slow drain device” condition.
The Circle of (Storage) Life
New storage technologies are quickly maturing and replacing legacy platforms. But will they be mature enough to meet your high availability, high performance IT infrastructure needs?
Performance Virtual Reality – Seeking the Truth in Storage Benchmarks
Benchmarks are perceived as a great way to quantify ‘feeds and speeds’ of storage hardware but they can be deceptive.
The Attack of the Disk Clones
While most mainframe shops have explored how to reduce mainframe software costs, we are finding significant latent savings opportunities still exist at even the best run sites.
The Storage Management Initiative (SMI): the Good, the Bad, and the Ugly – Part 1 “The Good”
The notion of having a common mechanism to communicate with and report on storage devices is good for both us as a company that provides storage analytics software, and for our customers.
Performance Modeling for Disk Storage Systems
This blog demonstrates how computer system performance modeling is done, specifically for disk storage systems.
Storage Management Initiative (SMI) and the Block Services Performance (BSP) sub-profile: the Good, the Bad, and the Ugly – Part 2 “The Bad”
While the technology chosen by the SMI program has significant benefits, it also has challenges.
Does everybody know what time it is? Tool Time!
IntelliMagic Vision is vendor neutral and handles storage from all the z/OS storage vendors with similar functionality.
Do SSDs Make Storage Performance a Lost Art?
Although SSDs provide many benefits, IntelliMagic Vision can help find and eliminate performance risk in your storage environment.
Obscured by Clouds – Why You Shouldn’t Outsource Data Storage to the Cloud
Cloud vendors are quick to tout the benefits of moving data storage to the cloud, but Lee LaFrese reminds us of the risks of outsourcing data storage to the cloud.
Today’s Forecast: Cloudy with a Chance of Sudden Alert Storms
IntelliMagic Vision provides deep insight and analysis tools to help avoid getting overloaded with meaningless alerts.
What Enterprise Storage system vendors won’t tell you about SSDs
IntelliMagic Vision provides you with the tools to keep a careful eye on the performance of your Enterprise Storage arrays including any SSDs that may be installed.
Anatomy of an Anomaly – Finding the Root Cause of a CONNECT Time Increase
Recently a situation occurred at one of our cloud services customers that was a real head-scratcher. One of the disk storage systems saw a sudden jump in CONNECT time. What had changed?
The Perils of Complacency with Enterprise Storage Systems
Over the last few years, Enterprise Storage Systems have advanced so much that it seems that they have nearly unlimited performance and resiliency. However, becoming complacent with your storage performance is fraught with peril.
How Far Behind is My Asynchronous Replication?
Most peer-to-peer replication methodologies prioritize application performance over replication currency, but if replication falls too far behind you need to find out about it quickly and know what should be done to fix it.
Estimating Storage System Capabilities Should not be a Risky Business!
If you want a useful headroom metric you need to define it properly.
Global Mirror RPO Spikes
This video will show you how IntelliMagic Vision can be used to provide visibility to the status of Global Mirror replication in a Globally Disbursed Parallel Sysplex environment.
High z/OS Disk Connect Time
By drilling down to specific volumes and consulting change logs, it is easy to determine the root cause of high z/OS Connect time as coming from a newly released SQL query.
How Can I Tell if My Back-End Drives Are Overloaded?
This case study shows how IntelliMagic Vision may be used to easily find the root cause of a z/OS performance issue related to overloaded back-end drives.