I'm looking at these two products to gather data to find long-term trends and perform capacity planning. I'm looking for opinions about why one should be used over another. Or are both necessary to get a complete picture. I have used DECps elsewhere (aka pcpa aka Unicenter TNG performance ...). I have also used t4 elsewhere. But I don't have any experience with ECP.
I use them for different things. ECP can get you overview graphs and a report very simply. T4 is better at detail but I have trouble getting long term high level trends from it.
I would go for ECP. You can extract CSV data from ECP to load into excel to plot yr own graphs if you don't like the ones it does. perfcap.com do a capacity planner product that uses ECP data.
There are various tools to display graphs for T4 data however for looking at long term trends I find ECP easier. T4 data needs reducing if you want to say look at total CPU utilisation over the last month or six. T4 is good for detail. Gary wants long-term trends and capacity planing. If you have the disk space run both.
There exists another option for collecting performance data and capacity anlysis - called PerfDat. This performance solution, developed by HP, provides more detailed statistics as you will get from ECP, T4 or DECps. One of the main components of the solution is the so called auto-trend engine for capacity analysis. Once customized there is no need of any further data management activities to get the long time trends.
PerfDat provides many advanced data analysis and data management features which make life easier in the context of reducuing data analysis time and getting rid of manual data management activities, even if you are monitoring big environments (50+ nodes).
If you want to get more infos about PerfDat, please contact PERFDAT@HP.COM
Thanks for the feedback; it was very helpful. For the time being, we decided to install ECP. My experience with T4 does lead me to believe it is more useful for looking at detail data rather than looking at trends. I look forward to seeing what ECP can do. I am also look into PERFDAT.
I will leave this thread open a bit longer so that others may add to the discussion for posterity. I will likely add feedback after I get a chance to try ECP.
I have spent a few hours now using ECP. And I was just about to close this thread saying that I am disappointed in the analyzer. It doesn't allow me to look at more that one data file at a time, which prevents a long-term view. Also, it doesn't seem to distinguish between read and write disk I/O. Before I close this thread, I thought I would give everyone a chance to let me know that I missed something about the analyzer. Is there some sort of data reducer or a menu entry that I missed?
Garry, there are all sorts of extra things you can get to go with ECP but you have to buy it from perfcap.com. What you get for free is the basic stuff.
Karl, Good point on the before/after comparison. This makes the t4/tlviz useful for measuring the success of tuning efforts. I suppose it could be used to compare the same day for different calendar years; e.g. 12/24/03 vs 12/24/04; I guess that could be used for capacity planning.
Ian, Thanks. You confirm some of my observations; ECP is a start, but I am of the opinion that CP in ECP is lacking.
FWIW, I find both T4 and ECP lacking the ability to easily and readily produce long-term trend data. For this reason, I find that both products are a bit lacking for capacity planning. True, there are add-ons that can be purchased for ECP. And of course, you can always grow your own add-ons.
OpenVMS is a great operating system!
At this point I will close this thread.
Thanks everyone for your responses. Merry Christmas and Happy New Year to you all.
