[Info-vax] OpenVMS - DCL - Data entry filtering

[mcleanjoh at gmail.com]

On Sunday, March 29, 2015 at 6:41:29 AM UTC+11, Stephen Hoffman wrote:
> On 2015-03-28 17:53:45 +0000, David Froble said:
> 
> > What type of application will be creating 10,000 or more files each 
> > day, and, after created, what is done with the files?
> 
> I've encountered OpenVMS sites with that many log files from ftp 
> operations, some with transaction-related files, sometimes outbound 
> mail messages, all sorts of things.  (More than a few of these folks 
> should probably switch tactics here, but... excuses are made.)  Ten 
> thousand files is a little better than one a second, though most have 
> traffic rates that aren't that smooth.
> 
> Having five and ten thousand active network connections in parallel, 
> and having connection rates of five thousand network connections a 
> second aren't particularly unusual in larger (usually non-OpenVMS) 
> configurations.
> 
> 
> -- 
> Pure Personal Opinion | HoffmanLabs LLC

I think you forgot to add the fact that many sites seem to want to use a prefix on filenames so that they can easily identify what they are.  Adding a prefix that consists of the same characters each time, even as few as less than 4, further impacts directory performance because of the internal indexing system that's used.