Friday, May 16, 2014
Sharing logging context across application boundaries
Tuesday, May 13, 2014
Launched TNT4J -- Java Open Source Project for Tracking, Tracing Application Behavior
Simple logging of severity/message combo is just not enough when it comes to truly distributed, concurrent applications. Frankly I was tired of going through log files and trying to figure out why apps behave they way they do. I created this framework to deal with 3 basic logging problems:
- How do I log only what is needed and across applications, runtimes (is DebugEnabled()) simply is not enough and produced too much unrelated data across concurrent apps.
- How do I correlate and relate log entries within and across logs that belong to a logical activity such as order process, request etc and across multiple threads, applications, runtimes. Logs are just simply a big mess.
- How do I record important metrics and state of the app, business process? Many times I ask myself what else was going on when this error occured? What was GC, memory, my apps internal variables etc, etc. Much of this info is simply hidden and not available.
Monday, March 8, 2010
Business Transaction Management vs. Business Transaction Performance
BTM or Business Transaction Management vs. Business Transaction Performance -- two terms aimed to describe the current state of the affairs in what Gartner calls Transaction Profiling. Ever since I came across the term BTM I questioned whether the term actually reflects what vendors do in this space. The word "management" implies a bi-directional relationship between the manager and the entity being managed. In the world of Application Performance Management the term management implies "measure, monitor, administer, control, plan, automate, improve". If anything the BTM should be redefined as Business Transaction Performance Management or BTPM. Transaction Profiling (Gartner's definition) while more accurate implies a specific implementation of how performance is actually accomplished -- "profiling". One can envision measuring transaction performance without actually doing any profiling. It seems that profiling is an implementation construct and as such should be avoided when naming a broad discipline such as this. In fact BTM, as defined, is really a derivative of Business Process Management rather than an Application Performance Management discipline.
The term BTM actually confuses the market place. What part of "management" is actually being done by the vendors in the space? Most if not all vendor in this space measure performance and report. Any proactive involvement in the transaction lifecycle itself is minimal or not practical in most cases. How practical is it to define application and business logic within a transaction "management" tool? And even if it were feasible wouldn't it be better to do this in the BPM orchestration layer? Managing transaction lifecycle is already defined by the Business Process Management discipline and as such belongs in the BPM space. Today's transactions are orchestrated and therefore managed by widely known BPM tools from IBM, Microsoft, Oracle and others. So either BTM is part of BPM, rather than APM and if this is true do we really need another term to describe the same thing? or BTM simply is all about performance and therefore "management" should be dropped from the acronym.
No matter what we call things, it is important to understand what these things actually are in reality. BTM, no matter what vendors say focus on performance and measurement. Any active involvement in the transaction lifecycle, while possible, in many cases impractical and in most not desirable for many reasons. So BTM is really about performance, and in my view BTP (Business Transaction Performance) or BTPM (Business Transaction Performance Management) are more appropriate. Keeping terms honest is important and benefits the end user. Why? because we are already awash in so many terms, abbreviations, acronyms, technologies, products and vendors with "super-natural abilities". What we need is simplicity and clarity rather than ambiguity and complexity.
Thursday, October 29, 2009
Technology Overload
Enterprise solutions are so complex and vendor messaging so confusing and ambiguous that often times you need Gartner or some other research agency to decode what is what. The number of new terms, abbreviations is just staggering. The best way to deal with complexity is ... simplicity. I like the KISS approach Keep It Simple and Stupid or Stupid and Simple. But unfortunately that is not what is happening.
Monday, April 21, 2008
On events, non-events and metrics
So what are the events and how they are different from facts? Event is a change in state of one or more facts. A “High CPU usage” event simply means that CPU usage has exceeded a certain threshold defined by the observer. So events are just the vehicles by which changes in facts are carried from the source to the observer. Therefore most events if not all have the following common attributes {source, timestamp, variable1, variable2...., cause=other_event_list}. Timestamp is simply a time associated with the change of fact state or attribute. Example: temperature changed from 20 to 30F. One can design a event generator that creates add, removed, change events every time a fact is added, removed or changed. These events in turn can feed into a CEP or EP engine for processing.
It is also worth noting that detecting non-events should always be in the context of time, (for example non-occurrence within last 5 min or 24 hours). When the time interval expires it is easy to check for occurrence of certain events and evaluate the remaining CEP expression.