download a 0.5 Gb file.

There are three limiting factors to the potential to speed up the download:

  1. Do you have the bandwidth at your machine to carry 2 or more parallel download streams?
  2. Does the server have the capacity to serve 2 or more parallel download streams?
  3. Will requesting parallel download streams break the serving sites terms and conditions? (Or just upset them?)

If you can answer yes to the first two and (honestly) no to the latter, then you might be able to decrease the download time by concurrently requesting two or more partial downloads using the range: bytes=<start>-<end> header.

This (i fuzzily recall) can be achieved using LWP, though I found it both easier and faster to use IO::Socket and raw http.

Another is to compress/uncompress 49 files, each of which is on the order of 300Mb.

Which is it? Compress them or uncompress them? Or both (in that order or the reverse)? And are they anything to do with the 0.5GB file?

On the surface is seems likely there is potential to overlap at least some of this work; but you'll need to make it a lot clearer what you are actually doing.

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re: Getting/handling big files w/ perl by BrowserUk
in thread Getting/handling big files w/ perl by Gisel

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