[Borgbackup] CPU/time use of Borg

[MRob]

On 2020-05-05 22:06, Dmitry Astapov wrote:
> This is how a typical backup looks for me :

Thank you Dmitry this is helpful! My testing on very busy server 
probably starved CPU and some iowait. Your stats helpful to see. Am i 
right it is personal comp (not very busy CPU)?

> Duration: 1 minutes 41.41 seconds
> Number of files: 558471
> ------------------------------------------------------------
> ------------------
>                        Original size      Compressed size    
> Deduplicated
> size
> This archive:               78.84 GB             50.79 GB             
> 31.52
> MB
> All archives:               23.03 TB             14.64 TB            
> 101.51
> GB
> 
>                        Unique chunks         Total chunks
> Chunk index:                  778813            170023300
> 
> This is over wifi to a NAS server on the local network.
> 
> Backups are taken every 30 minutes, process on the source system uses 
> about
> 330 Mb VSS / 230 Mb RSS.
> 
> There must be something in your setup that causes slowness (source
> filesystem? Target filesystem? No stable inodes ? No stable mtimes? 
> ....).
> 
> On Tue, May 5, 2020, 22:33 MRob <mrobti at insiberia.net> wrote:
> 
>> >> Another question: after for example a year of backup does it require
>> >> alot more CPU/RAM to compute chunk deltas?
>> >
>> > cpu/time will generally be proportional to the number of chunks you
>> > have in
>> > total (it may vary from operation to operation)
>> 
>> My simple test over local network took alittle over 2min/Gb on 1st
>> backup. Its ok if only 1st time. But 2nd time was still over 1min/Gb 
>> and
>> 3rd backup very close to 2min/Gb again. (its for busy production 
>> server)
>> 
>> I like borg, but if it wont ever get faster maybe I can't use borg :(
>> Is borg only for fast & non-busy hardware?
>> 
>> (see other thread, asking way for offload operations from client to
>> backup server)
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