Tag Archives: JES2
A guest post by Denise P. Kalm – I’ve previously talked about the studies showing that multi-tasking isn’t as successful a strategy for getting things done. We don’t tolerate the ‘interrupts’ as well as we think we do. Simply putting your head down and getting something done works better with our brains. But that’s us. It turns out that multi-tasking gives you quite a benefit when software does it. But some software does it better than others.
As part of z/OS R2.2, IBM has included Job Execution Control (JEC), a way to group jobs so you can define dependencies within a group. This concept offers a lot of scheduling flexibility. It sounds new and great, until you realize that ThruPut Manager has already had this feature with DJC for 20 years. Time-tested and proven by many satisfied companies, the capabilities of DJC haven’t changed since 1995 and work as well as ever.
Delays are part of our daily lives. We wait in line at the grocery store, at the drive-through, and on the road in our cars. While it may not seem like it, delays are a fact of life in your mainframe as well. As amazingly fast as these machines are, there are inevitably some measurable delays in application response times and throughput. The question is: should you care about these delays?
Performance Analysis is about identifying the distribution of response times and dealing with each component. For example, if a job runs for two hours but only uses ten minutes of CPU time, there is little to be gained by running the job on a faster CPU. The best “bang for the buck” is to look at where the other 110 minutes are being spent and try to reduce those delays.
With the focus on compliance, most companies have SLAs for online work, but many don’t have SLAs for batch. We all know only too well that users have expectations as stringent as SLAs. Everyone’s tracking how well you manage batch, but because the batch SLAs aren’t documented, they are what the users think they should be. How can you possibly manage that!?
Remember those days when budgets weren’t so tight? Back then, when you had a performance problem, it was so easy to say, ‘Let’s throw hardware at the problem,’ which always meant getting more processors or a faster CPU. And it almost always worked. But was CPU always the problem?
Performance is a challenging area now because you must provide the best service possible but at the lowest price. To acquire more hardware of any kind, you need to make a case, which means proving which resource is really constrained. You can’t just focus on CPU as the problem; it often isn’t the primary driver for your service level. I/O rates, network and memory can all be a factor, depending on the workloads.
A guest post by Denise P. Kalm – Each year, with the best of intentions, we set out to make at least one resolution that will help make us healthier, happier or more successful. Only too often, by February, we’ve stopped trying and gone back to our old ways. Isn’t working smarter, not harder, the kind of thing your manager is always telling you to do as he hands you more work than one person could possibly manage?
Aren’t we all working too hard now? But while the phrase has been overused and misused, implying that we are just dogging it instead of thinking of better ways to work, in fact, in IT, there are better options. What if you could have a virtual assistant, one that doesn’t require salary or benefits? That might work well. Working smarter should mean working on smart, valuable tasks.
While rushing around this holiday season – decorating, sending cards and buying gifts – it’s easy to forget to take care of yourself. While diet, exercise and a good night’s sleep are great for your body, what are you doing for your career? Wouldn’t it be great if you could give yourself a gift that would not only help you survive and thrive in your job, but also make it more fun and that much easier?
The gift that keeps on giving, long after you’ve torn off the wrapping, is smart automation. The right kind of automation will provide some significant benefits, not just to your company, but to you personally. While your company is seeking to lower costs, improve the bottom line, and improve customer satisfaction, what you want is something different.