Tuesday, June 10, 2008

Making scp go a little quicker

Transferring files with scp isn't the quickest option, but if it's the only one there's a simple way to make it go a little quicker.

scp -c blowfish source.file remote.host:/destination/file.name


Using blowfish rather than the default 3des gave me about an extra 50% or so of throughput.

This was really noticeable on my new T5120s, where I went from under 10M/s to over 13M/s for a single copy. (OK, so it can probably run lots in parallel, but I was just moving large images.)
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2 comments:

  1. Niall11:50 PM

    I'm pretty sure that 3des is only the default cipher for protocol 1, and an aes cbc is the default cipher for protocol 2.

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  2. Anonymous12:02 AM

    I've found arcfour to be even faster than blowfish on the Niagara class CPUs...worth a try.

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