 |
 |
I would adopt url syntax to generalize specifying data sources and targets. The use of "cat" is Unix legacy in the sense that cp never had a way to specifying that the target was stdout. So the gurus hard linked cat to cp so that the program would know, by the name it was invoked, how to configure the output. For pipes, I propose we use: pipe:[//<hostname>[/<pipe application>]] The default pipe application, if not specified, would be stdout for output and stdin for input. The default host would be localhost. In fact, for xrdcp, it would make no sense at this point to allow anything but localhost for the pipe location. For instance, using xrdcp to take data from application "foobar" and feed it into an xrootd server would look likeL xrdcp pipe://localhost/foobar xrootd://xrd-rdr03/store/file.root You can imagine sematically going wild with this syantx, but for now, we should keep it real simple. Andy ----- Original Message ----- From: "Peter Elmer" <[log in to unmask]> To: "Artem Trunov" <[log in to unmask]> Cc: "Fabrizio Furano" <[log in to unmask]>; <[log in to unmask]> Sent: Thursday, September 16, 2004 9:48 AM Subject: Re: requirements for xrdcp > On Thu, Sep 16, 2004 at 09:39:35AM -0700, Artem Trunov wrote: > > > Artem, you want to read the log files remotely at all costs, don't you? > > > > I realized some time ago, that the cost is your dead body... > > Ah, was my response at some point "over my dead body"? I don't think > I ever said that about reading the log files. Usually that response is > evoked when someone starts talking about contacting databases from worker > nodes and other stupid things like that. > > An 'xrdcat' could in fact be doable. ;-) Then one just have to organize > the logs so that they are exported, which I already wanted to do to harvest > them for other reasons. And I guess it could allow you to deal with the > HPSS/staging logs or whatever else on the machine, too. > > Pete > > ------------------------------------------------------------------------- > Peter Elmer E-mail: [log in to unmask] Phone: +41 (22) 767-4644 > Address: CERN Division PPE, Bat. 32 2C-14, CH-1211 Geneva 23, Switzerland > ------------------------------------------------------------------------- >