Need to copy a 200GB directory

[Matt Minuti]

My muscle memory always puts the flags "-avz" (sometimes I even remember to
add a P in there), so there must have been one point in time where you had
to specify compression. Might still be the case.

On Tue, Jun 27, 2017, 12:02 PM mark <prgrmr at gmail.com> wrote:

> My mistake. I wrote encryption when I meant compression, as I belive rsync
> always compresses--but I could be mistaken about that, too!
>
> Mark
> On Jun 27, 2017 11:55 AM, "Tom Buskey" <tom at buskey.name> wrote:
>
>> 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 at 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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