[Borgbackup] performance problem

[Giuseppe Arvati]

Il 31/08/2017 14:31, Thomas Waldmann ha scritto:
>> the 1st archive is about 195GB with 462.000 files and take
>> about 11  hours to complete
>>
>> the 2nd archive is about 377GB with 1.020.000 files and take
>> less then 2 hours
> 
> Let's rather refer to this as the utenti and gruppi data set.
> 
> "1st" and "2nd archive" gives the wrong impression that 1st = initial
> backup, 2nd = subsequent backup (of same data set).
> 
>> I do not understand what can slow down the performance of the first
>> archive.
> 
> Are both backups running on same machine?

    yes in the same job the 2nd start when 1st finish

> Are both backups storing into the same repository? Or at least into a
> repository located on the same borg repo server?

    yes to network storage via NSF

> The data set read by the backups - where does the data come from?
   local FS but are two differente samba network share
> Different performance might just come from differently performing source
> file systems.
> 
> If it is not a local filesystem, lower performance is expected.

> Do you always backup the same path or do you mount at different places?
> Pathes need to be stable or the files cache can't work.

   same path  ( smb network share )

> Also check whether inode numbers are stable. Network filesystems often
> do not have stable inode numbers, you can have a look at --ignore-inode
> option of borg create then.

   I will try

> Also, I think you should use lz4 compression at least. It usually saves
> more time than it needs.

   I'll try

   can be a problem related to lock/timeout for same files served by 
samba ?

thank you
Giuseppe