With regards to the query “128-Bit Precision with GCC” in the Best of Tech column of the December 2001 issue, the reply was neither correct nor helpful—GMP is not the equivalent and using GMP means rewriting code. Some compilers, AIX amongst them, will carry out calculations using 64 bits (or 128 bits, depending on the processor) with the appropriate option. (Using this, means that the product of two 32-bit numbers will always fit within an int. No code modification is needed.) GMP, however, is a multi-precision package that defines certain data structures wherein the multi-precision numbers are put. To use it, you must extensively rewrite your code. Some compilers, including gcc, accept the “long long” extension and use 64 bits for calculation but that still requires modifying your code and raises portability questions. My answer would be that, sadly, there is no equivalent without some sort of code modification. Such an option to gcc would be nice, though.
Upon rereading my letter [above], I realized that it reads far harsher than I intended. Both the column and the individual answering the query have done your readers good service in the past. I did not mean to slight either, and I apologise if anyone took amiss. I merely wished to indicate that the solution is by no means simple.
Practical Task Scheduling Deployment
July 20, 2016 12:00 pm CDT
One of the best things about the UNIX environment (aside from being stable and efficient) is the vast array of software tools available to help you do your job. Traditionally, a UNIX tool does only one thing, but does that one thing very well. For example, grep is very easy to use and can search vast amounts of data quickly. The find tool can find a particular file or files based on all kinds of criteria. It's pretty easy to string these tools together to build even more powerful tools, such as a tool that finds all of the .log files in the /home directory and searches each one for a particular entry. This erector-set mentality allows UNIX system administrators to seem to always have the right tool for the job.
Cron traditionally has been considered another such a tool for job scheduling, but is it enough? This webinar considers that very question. The first part builds on a previous Geek Guide, Beyond Cron, and briefly describes how to know when it might be time to consider upgrading your job scheduling infrastructure. The second part presents an actual planning and implementation framework.
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With all the industry talk about the benefits of Linux on Power and all the performance advantages offered by its open architecture, you may be considering a move in that direction. If you are thinking about analytics, big data and cloud computing, you would be right to evaluate Power. The idea of using commodity x86 hardware and replacing it every three years is an outdated cost model. It doesn’t consider the total cost of ownership, and it doesn’t consider the advantage of real processing power, high-availability and multithreading like a demon.
This ebook takes a look at some of the practical applications of the Linux on Power platform and ways you might bring all the performance power of this open architecture to bear for your organization. There are no smoke and mirrors here—just hard, cold, empirical evidence provided by independent sources. I also consider some innovative ways Linux on Power will be used in the future.Get the Guide