Hello,

our backup-client is a zfs-storage, which has 48 harddisk which is configured 
as RAID10 with SSDs for read and write cache, before I backup my data I create 
a snapshot.

So far so good, my problem is that the incremental backup took around 32minutes 
every time, no matter how many files or how many gigabytes, for me the 
bottleneck is not the network, nor the backup storage, nor the client. When the 
backup run the bareos-fd client has a cpu utilisation of around 15%, iowait and 
also the load is around 0-1(%).

SO can somebody tell me why is it so slow and how can i tune this? A fullbackup 
(around 6,5TB) takes 26hours, I expect a read/backup speed of >150MB/s. The 
Rate differs between 1709.4 KB/s and 143351.1 KB/s from my last 50 inc Backups

Here two examples:

23-Jan 02:00 bareos-dir JobId 1063: Start Backup JobId 1063, 
Job=clouddata.2019-01-23_02.00.00_30
23-Jan 02:00 bareos-dir JobId 1063: There are no more Jobs associated with 
Volume "Incremental-0188". Marking it purged.
23-Jan 02:00 bareos-dir JobId 1063: All records pruned from Volume 
"Incremental-0188"; marking it "Purged"
23-Jan 02:00 bareos-dir JobId 1063: Recycled volume "Incremental-0188"
23-Jan 02:00 bareos-dir JobId 1063: Using Device "FileStorage" to write.
23-Jan 01:54 zfs-serv1-fd JobId 1063: DIR and FD clocks differ by -324 seconds, 
FD automatically compensating.
23-Jan 01:54 zfs-serv1-fd JobId 1063: shell command: run ClientBeforeJob 
"/sbin/zfs snapshot -r nc_storage@bareos"
23-Jan 02:00 bareos-sd JobId 1063: Recycled volume "Incremental-0188" on device 
"FileStorage" (/backupdata), all previous data lost.
23-Jan 02:00 bareos-dir JobId 1063: Max Volume jobs=1 exceeded. Marking Volume 
"Incremental-0188" as Used.
23-Jan 02:25 zfs-serv1-fd JobId 1063: shell command: run ClientAfterJob 
"/sbin/zfs destroy -r nc_storage@bareos"
23-Jan 02:31 bareos-sd JobId 1063: Elapsed time=00:31:12, Transfer rate=5.970 M 
Bytes/second
23-Jan 02:31 bareos-dir JobId 1063: sql_create.c:872 Insert of attributes batch 
table done
23-Jan 02:31 bareos-dir JobId 1063: Bareos bareos-dir 17.2.4 (21Sep17):
  Build OS:               x86_64-pc-linux-gnu debian Debian GNU/Linux 9.3 
(stretch)
  JobId:                  1063
  Job:                    clouddata.2019-01-23_02.00.00_30
  Backup Level:           Incremental, since=2019-01-22 02:00:00
  Client:                 "zfs-serv1.my.domain.de" 17.2.4 (21Sep17) 
x86_64-pc-linux-gnu,debian,Debian GNU/Linux 9.3 (stretch),Debian_9.0,x86_64
  FileSet:                "backup-zfs-serv" 2018-03-06 12:19:01
  Pool:                   "Incremental" (From Job IncPool override)
  Catalog:                "MyCatalog" (From Client resource)
  Storage:                "File" (From Job resource)
  Scheduled time:         23-Jan-2019 02:00:00
  Start time:             23-Jan-2019 02:00:00
  End time:               23-Jan-2019 02:31:13
  Elapsed time:           31 mins 13 secs
  Priority:               10
  FD Files Written:       2,257
  SD Files Written:       2,257
  FD Bytes Written:       11,175,399,254 (11.17 GB)
  SD Bytes Written:       11,175,894,854 (11.17 GB)
  Rate:                   5966.6 KB/s
  Software Compression:   72.8 % (lz4)
  VSS:                    no
  Encryption:             no
  Accurate:               no
  Volume name(s):         Incremental-0188
  Volume Session Id:      267
  Volume Session Time:    1539762885
  Last Volume Bytes:      11,189,726,587 (11.18 GB)
  Non-fatal FD errors:    0
  SD Errors:              0
  FD termination status:  OK
  SD termination status:  OK
  Termination:            Backup OK
  
  
  

07-Mar 02:00 bareos-dir JobId 1180: Start Backup JobId 1180, 
Job=clouddata.2019-03-07_02.00.00_06
07-Mar 02:00 bareos-dir JobId 1180: There are no more Jobs associated with 
Volume "Incremental-0045". Marking it purged.
07-Mar 02:00 bareos-dir JobId 1180: All records pruned from Volume 
"Incremental-0045"; marking it "Purged"
07-Mar 02:00 bareos-dir JobId 1180: Recycled volume "Incremental-0045"
07-Mar 02:00 bareos-dir JobId 1180: Using Device "FileStorage" to write.
07-Mar 01:59 zfs-serv1-fd JobId 1180: DIR and FD clocks differ by -30 seconds, 
FD automatically compensating.
07-Mar 01:59 zfs-serv1-fd JobId 1180: shell command: run ClientBeforeJob 
"/sbin/zfs snapshot -r nc_storage@bareos"
07-Mar 02:00 bareos-sd JobId 1180: Recycled volume "Incremental-0045" on device 
"FileStorage" (/backupdata), all previous data lost.
07-Mar 02:00 bareos-dir JobId 1180: Max Volume jobs=1 exceeded. Marking Volume 
"Incremental-0045" as Used.
07-Mar 02:31 zfs-serv1-fd JobId 1180: shell command: run ClientAfterJob 
"/sbin/zfs destroy -r nc_storage@bareos"
07-Mar 02:31 bareos-sd JobId 1180: Elapsed time=00:31:58, Transfer rate=9.753 M 
Bytes/second
07-Mar 02:32 bareos-dir JobId 1180: sql_create.c:872 Insert of attributes batch 
table done
07-Mar 02:32 bareos-dir JobId 1180: Bareos bareos-dir 17.2.4 (21Sep17):
  Build OS:               x86_64-pc-linux-gnu debian Debian GNU/Linux 9.3 
(stretch)
  JobId:                  1180
  Job:                    clouddata.2019-03-07_02.00.00_06
  Backup Level:           Incremental, since=2019-03-06 02:00:01
  Client:                 "zfs-serv1.my.domain.de" 17.2.4 (21Sep17) 
x86_64-pc-linux-gnu,debian,Debian GNU/Linux 9.3 (stretch),Debian_9.0,x86_64
  FileSet:                "backup-zfs-serv" 2018-03-06 12:19:01
  Pool:                   "Incremental" (From Job IncPool override)
  Catalog:                "MyCatalog" (From Client resource)
  Storage:                "File" (From Job resource)
  Scheduled time:         07-Mar-2019 02:00:00
  Start time:             07-Mar-2019 02:00:00
  End time:               07-Mar-2019 02:32:00
  Elapsed time:           32 mins 
  Priority:               10
  FD Files Written:       27,685
  SD Files Written:       27,685
  FD Bytes Written:       18,699,788,372 (18.69 GB)
  SD Bytes Written:       18,707,482,165 (18.70 GB)
  Rate:                   9739.5 KB/s
  Software Compression:   51.9 % (lz4)
  VSS:                    no
  Encryption:             no
  Accurate:               no
  Volume name(s):         Incremental-0045
  Volume Session Id:      384
  Volume Session Time:    1539762885
  Last Volume Bytes:      18,725,855,238 (18.72 GB)
  Non-fatal FD errors:    0
  SD Errors:              0
  FD termination status:  OK
  SD termination status:  OK
  Termination:            Backup OK

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