Need to copy a 200GB directory

[Tom Buskey]

rsync doesn't encrypt if there's no remote, as in this case.

To be pedantic, rsync to remotes uses ssh by default but it can use rsh
which has no encryption.  Some older versions of SSH allowed you to specify
the encryption.  I recall using XOR encryption for faster operation where
security was not needed.

Encryption typically does some compression.  If you compress 2x, you're
doubling the bits through the pipe in the same time.  If the
encryption/compression computation at either end is faster than than the
uncompressed bandwidth, you'll have faster throughput.  That's very typical
on newer multicore, high GHz CPUs.

On Mon, Jun 26, 2017 at 4:11 PM, mark <prgrmr at gmail.com> wrote:

> Locally, cp is faster because you cannot make rsync not encrypt, but the
> restart-from-where-it-stopped feature of rsync makes it worth the wait.
>
> Mark
> On Jun 26, 2017 3:18 PM, "Charles Farinella" <cfarinella@
> appropriatesolutions.com> wrote:
>
>> We need to copy a large (200+GB) directory from one filesystem to
>> another, both locally mounted.
>>
>> I'm unsure as to what I should use to do this, cp, rsync, dd?
>>
>> Any suggestions appreciated.
>>
>> Thanks.
>>
>> --charlie
>>
>> Charlie Farinella
>> Systems Administrator
>> Appropriate Solutions, Inc.
>> 1-603-924-6079 <(603)%20924-6079>
>>
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>>
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