SEO

#1 (**permalink**) 01-18-2008, 05:46 PM

Hi All,

I'm not great with Linux, so maybe someone can help me with this.

I am running Red Hat 9.0. I set up an external USB drive and wrote a
small korn shell script to rsync my drive to the external drive as a
method of backup.

The rsync started at about 8 minutes to complete. On March 22nd it had

increased to 30 minutes. Then on March 23rd it jumped to 90 minutes to

complete.

Since I'd a dumbfuck, maybe someone can help me figure out why the time

jumped like that? It should not take 90 minutes to rsync an 80gb
drive, which is only 1/2 full..........

Any help or suggestions would be great.

Thanks!

#2 (**permalink**) 01-18-2008, 05:46 PM

On 21 Apr 2006 amerar@iwc.net wrote:

> I am running Red Hat 9.0. I set up an external USB drive and wrote a
> small korn shell script to rsync my drive to the external drive as a
> method of backup.
>
> The rsync started at about 8 minutes to complete. On March 22nd it
> had increased to 30 minutes. Then on March 23rd it jumped to 90
> minutes to complete.
> ...
> jumped like that? It should not take 90 minutes to rsync an 80gb
> drive, which is only 1/2 full..........

this depends very much on the type of data you're rsynching and on the
options used. could you show the command line and version? "rsync"
uses a "sliding window" to compare two versions of some data item. it
performs increasinlgy worse with the number of changes to a file.

clemens

#3 (**permalink**) 01-18-2008, 05:46 PM

On 21 Apr 2006 08:43:12 -0700, amerar@iwc.net
<amerar@iwc.net> wrote:
> Hi All,
>
> I'm not great with Linux, so maybe someone can help me with this.
>
>
> I am running Red Hat 9.0. I set up an external USB drive and wrote a
> small korn shell script to rsync my drive to the external drive as a
> method of backup.
>
>
> The rsync started at about 8 minutes to complete. On March 22nd it had
> increased to 30 minutes. Then on March 23rd it jumped to 90 minutes to
> complete.
>
Switch to a modern Linux distribution that supports USB 2.0. If you
bought your computer when RH9 was new, chances are that the hardware
doesn't support USB 2.0

--
Killing turkeys causes winter.

#4 (**permalink**) 01-18-2008, 05:46 PM

"Bill Marcum" <bmarcum@iglou.com> wrote in message
news:g3sph3-bsc.ln1@don.localnet...
> On 21 Apr 2006 08:43:12 -0700, amerar@iwc.net
> <amerar@iwc.net> wrote:
>> Hi All,
>>
>> I'm not great with Linux, so maybe someone can help me with this.
>>
>>
>> I am running Red Hat 9.0. I set up an external USB drive and wrote a
>> small korn shell script to rsync my drive to the external drive as a
>> method of backup.
>>
>>
>> The rsync started at about 8 minutes to complete. On March 22nd it had
>> increased to 30 minutes. Then on March 23rd it jumped to 90 minutes to
>> complete.
>>
> Switch to a modern Linux distribution that supports USB 2.0. If you
> bought your computer when RH9 was new, chances are that the hardware
> doesn't support USB 2.0

It could be other issues: for example, running checksums on lots of bulky
binary files can cause an rsync system to start swapping. Also, if you're
not doing "--delete -avH", you may not be gracefully duplicating hardlinks
or flushing old files, and the burden of those can accumulate and slow
things down as your mirrored repository grows.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

SEO

Rsync Question for the smart people