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Top Forums UNIX for Advanced & Expert Users Best way to transfer files to remote FTPS server instead of local FTPS server Post 302999439 by rbatte1 on Tuesday 20th of June 2017 09:39:18 AM
Old 06-20-2017
I will write this assuming that the place they are generated/written is Site A and they have clients in Site B.

Even though they two sites may only be 20 miles apart, you may find that there is a much smaller link between the sites. It is common to have 100Mb network at both sites, but only a 2Mb link between them. For small files being read at Site B that is not a problem. The issue is with larger files. I would suggest having a process to get a copy of files to Site B. You could implement some logic like this:-
  • When a large file is written to Site A, you should save a timestamp in a reference file and begin a copy to Site B. You can copy however you like, be that (s)ftp, rcp/scp, rsync or anything else that works for you.
  • When reading a larger file at site B, read the Site A reference file first and get the timestamp, comparing it with the timestamp of the local file. If the Site B file is up to date, read the local file; if not then read the Site A file.

An alternate may be to remove the Site B file when a new file is written to Site A and atomically copy the file to Site B. That way the Site B client just has to read the Site B file. If that fails (i.e. there is no file) then read the Site A file.



Would either of these work for you?

I hope that it helps,
Robin
 

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moniker(3pm)						User Contributed Perl Documentation					      moniker(3pm)

NAME
UNIVERSAL::moniker - Nicer names for your Perl modules/classes SYNOPSIS
use UNIVERSAL::moniker; DESCRIPTION
Class names in Perl often don't sound great when spoken, or look good when written in prose. For this reason, we tend to say things like "customer" or "basket" when we are referring to "My::Site::User::Customer" or "My::Site::Shop::Basket". We thought it would be nice if our classes knew what we would prefer to call them. This module will add a "moniker" (and "plural_moniker") method to "UNIVERSAL", and so to every class or module. moniker $ob->moniker; Returns the moniker for $ob. So, if $ob->isa("Big::Scary::Animal"), "moniker" will return "animal". plural_moniker $ob->plural_moniker; Returns the plural moniker for $ob. So, if $ob->isa("Cephalopod::Octopus"), "plural_moniker" will return "octopuses". (You need to install Lingua::EN::Inflect for this to work.) AUTHORS
Marty Pauley <marty+perl@kasei.com>, Tony Bowden <tony@kasei.com>, Elizabeth Mattijsen <liz@dijkmat.nl> (Yes, 3 authors for such a small module!) COPYRIGHT
Copyright (C) 2004 Kasei This program is free software; you can redistribute it under the same terms as Perl. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. perl v5.10.0 2009-06-09 moniker(3pm)
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