* Richard Adams <[EMAIL PROTECTED]> writes:
> On Mon, 31 Jan 2000, you wrote:
>>
>> Not sure if cp will do what I want to do. Because part of what I
>> want to do is to make incremental backups (only backing up files
>> that have changed since the last backup)
>>
>> I had a quick look at the cp man page and it doesn't mention
>> copying files that have changed since a certain date.
> What does it matter, updating an archive with only new files or
> creating a new archive each time, as i see it, creating a new
> archive each time has more advantages as just appending the archive
> with new files.
Except for when you do something stupid and end up backing up your
mistake. With my way of doing it you can restore from the day
before's backup.
> 1) You know for sure you get what you want.
If done right you will still get what you want with my system.
> 2) Less computing, smaller script, quicker.
Actually, it would mean more computing, larger script, and take
longer. Why?
Because on your system I would be tar'ing up about 100
meg each time. The script would have to be enlarged to incorporate
the cp'ing. The cp'ing would have to happen. These are all steps my
script doesn't have to do.
With my system: I tar 100 meg once/week, and a few kbytes each day.
My script doesn't have to cp anything. So, smaller script, less
computing, and it will take less time.
> 3) The file should never get corrupted.
Why would your way lessen the chance of file corruption?
> 4) The archive is then always up to date.
So is mine.
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