11-21-2017 10:15 AM
Hi!
I have an environment with NetBackup server 7.7.2 on SLES 12 SP1 and about 35 clients.
All clients are VMs running on VMware 6.0 and there are different OS running on them but most are Windows Server. There are also SLES 11, Oracle Linux 6.4 and some others.
There are two main policies: one of them stores the backups in a disk unit (in the NetBackup server) to make staging to tape later, and the other one stores directly in tape (TS3100). Both policies are VMware type and the VMs backed up by one are not backed up by the other policy.
So here comes the problem (idk if it's really a problem but I want to understand if it's not):
The differential incremental backups always bring more or slightly less data than full backups.
It doesn't make much sense to me because I think differential incremental backup should only transfer the changed files (blocks if we talk about the .vmdk, right?), and there are two VMs (Windows, one in disk and one in tape policy) that makes differential incremental correctly, as you can see in the screenshot.
So I want to know if this is a normal behaviour for VMware policies, a bug, bad config or something.
Regards.
Solved! Go to Solution.
11-21-2017 11:08 PM
Have a look at this TN:
11-21-2017 09:47 PM
Please post the output of bppllist <policy-name> -L
11-21-2017 10:02 PM
Here:
bppllist VMWARE30D -L
Policy Name: VMWARE30D
Options: 0x0
template: FALSE
audit_reason: ?
Names: (none)
Policy Type: VMware (40)
Active: yes
Effective date: 11/18/2016 11:00:00
File Restore Raw: yes
Block Incremental: yes
Application Consistent: yes
Mult. Data Stream: no
Perform Snapshot Backup: yes
Snapshot Method: VMware_v2
Snapshot Method Arguments: file_system_optimization=1,rTO=0,snapact=2,drive_selection=0,Virtual_machine_backup=2,enable_vCloud=0,multi_org=0,rHz=10,rLim=10,nameuse=1,disable_quiesce=1,ignore_irvm=1,exclude_swap=1,skipnodisk=0,tags_unset=0,post_events=1,trantype=hotadd:nbd:nbdssl:san
Perform Offhost Backup: yes
Backup Copy: 0
Use Data Mover: no
Data Mover Type: 2
Use Alternate Client: no
Alternate Client Name: MEDIA_SERVER
Use Virtual Machine: 1
Hyper-V Server Name: (none)
Enable Instant Recovery: no
Policy Priority: 1000
Max Jobs/Policy: Unlimited
Disaster Recovery: 0
Collect BMR Info: no
Keyword: (none specified)
Data Classification: -
Residence is Storage Lifecycle Policy: no
Client Encrypt: no
Checkpoint: no
Residence: LocalDisk
Volume Pool: DataStore
Server Group: *ANY*
Granular Restore Info: no
Exchange Source attributes: no
Exchange DAG Preferred Server: (none defined)
Application Discovery: yes
Discovery Lifetime: 28800 seconds
ASC Application and attributes: (none defined)
Generation: 20
Ignore Client Direct: no
Use Accelerator: no
Client/HW/OS/Pri/CIT: MEDIA_SERVER VMware VMware 0 0 0 ?
Include: vmware:/?filter=Displayname Equal "vDeskW7-Parent2" OR (Annotation Contains "Backup_30D" AND Powerstate Equal poweredOn)
Schedule: Full
Type: FULL (0)
Frequency: 7 day(s) (604800 seconds)
Excluded Dates----------
No specific exclude dates entered
No exclude days of week entered
Retention Level: 1 (2 weeks)
u-wind/o/d: 0 0
Incr Type: DELTA (0)
Alt Read Host: (none defined)
Max Frag Size: 0 MB
PFI Recovery: 0
Maximum MPX: 1
Number Copies: 1
Fail on Error: 0
Residence: (specific storage unit not required)
Volume Pool: (same as policy volume pool)
Server Group: (same as specified for policy)
Residence is Storage Lifecycle Policy: 0
Daily Windows:
Day Open Close W-Open W-Close
Sunday 000:00:00 000:00:00
Monday 000:00:00 000:00:00
Tuesday 000:00:00 000:00:00
Wednesday 000:00:00 000:00:00
Thursday 000:00:00 000:00:00
Friday 000:00:00 000:00:00
Saturday 018:00:00 056:00:00 162:00:00 200:00:00 032:00:00
Schedule: Differential-Inc
Type: INCR (1)
Frequency: 1 day(s) (86400 seconds)
Excluded Dates----------
EXCLUDE DATE 0 - 12/02/2016
EXCLUDE DATE 1 - 12/03/2016
No exclude days of week entered
Retention Level: 0 (1 week)
u-wind/o/d: 0 0
Incr Type: DELTA (0)
Alt Read Host: (none defined)
Max Frag Size: 0 MB
PFI Recovery: 0
Maximum MPX: 1
Number Copies: 1
Fail on Error: 0
Residence: (specific storage unit not required)
Volume Pool: (same as policy volume pool)
Server Group: (same as specified for policy)
Residence is Storage Lifecycle Policy: 0
Daily Windows:
Day Open Close W-Open W-Close
Sunday 000:00:00 000:00:00
Monday 018:00:00 032:00:00 042:00:00 056:00:00
Tuesday 018:00:00 032:00:00 066:00:00 080:00:00
Wednesday 018:00:00 032:00:00 090:00:00 104:00:00
Thursday 018:00:00 032:00:00 114:00:00 128:00:00
Friday 018:00:00 032:00:00 138:00:00 152:00:00
Saturday 000:00:00 000:00:00
bppllist VMWARE30D-Tape -L
Policy Name: VMWARE30D-Tape
Options: 0x0
template: FALSE
audit_reason: ?
Names: (none)
Policy Type: VMware (40)
Active: yes
Effective date: 11/18/2016 11:00:00
File Restore Raw: yes
Block Incremental: yes
Application Consistent: yes
Mult. Data Stream: no
Perform Snapshot Backup: yes
Snapshot Method: VMware_v2
Snapshot Method Arguments: file_system_optimization=1,rTO=0,snapact=2,drive_selection=0,Virtual_machine_backup=2,enable_vCloud=0,multi_org=0,rHz=10,rLim=10,nameuse=1,disable_quiesce=1,ignore_irvm=1,exclude_swap=1,skipnodisk=0,tags_unset=0,post_events=1,trantype=hotadd:nbd:nbdssl:san
Perform Offhost Backup: yes
Backup Copy: 0
Use Data Mover: no
Data Mover Type: 2
Use Alternate Client: no
Alternate Client Name: MEDIA_SERVER
Use Virtual Machine: 1
Hyper-V Server Name: (none)
Enable Instant Recovery: no
Policy Priority: 1000
Max Jobs/Policy: Unlimited
Disaster Recovery: 0
Collect BMR Info: no
Keyword: (none specified)
Data Classification: -
Residence is Storage Lifecycle Policy: no
Client Encrypt: no
Checkpoint: no
Residence: TS3100
Volume Pool: DataStore
Server Group: *ANY*
Granular Restore Info: no
Exchange Source attributes: no
Exchange DAG Preferred Server: (none defined)
Application Discovery: yes
Discovery Lifetime: 28800 seconds
ASC Application and attributes: (none defined)
Generation: 25
Ignore Client Direct: no
Use Accelerator: no
Client/HW/OS/Pri/CIT: MEDIA_SERVER VMware VMware 0 0 0 ?
Include: vmware:/?filter=Annotation Contains "Tape_30D" AND Powerstate Equal poweredOn
Schedule: Full
Type: FULL (0)
Frequency: 7 day(s) (604800 seconds)
Excluded Dates----------
No specific exclude dates entered
No exclude days of week entered
Retention Level: 1 (2 weeks)
u-wind/o/d: 0 0
Incr Type: DELTA (0)
Alt Read Host: (none defined)
Max Frag Size: 0 MB
PFI Recovery: 0
Maximum MPX: 1
Number Copies: 1
Fail on Error: 0
Residence: (specific storage unit not required)
Volume Pool: (same as policy volume pool)
Server Group: (same as specified for policy)
Residence is Storage Lifecycle Policy: 0
Daily Windows:
Day Open Close W-Open W-Close
Sunday 000:00:00 000:00:00
Monday 000:00:00 000:00:00
Tuesday 000:00:00 000:00:00
Wednesday 000:00:00 000:00:00
Thursday 000:00:00 000:00:00
Friday 000:00:00 000:00:00
Saturday 017:00:00 056:00:00 161:00:00 200:00:00 032:00:00
Schedule: Differential-Inc
Type: INCR (1)
Frequency: 1 day(s) (86400 seconds)
Excluded Dates----------
No specific exclude dates entered
No exclude days of week entered
Retention Level: 0 (1 week)
u-wind/o/d: 0 0
Incr Type: DELTA (0)
Alt Read Host: (none defined)
Max Frag Size: 0 MB
PFI Recovery: 0
Maximum MPX: 1
Number Copies: 1
Fail on Error: 0
Residence: (specific storage unit not required)
Volume Pool: (same as policy volume pool)
Server Group: (same as specified for policy)
Residence is Storage Lifecycle Policy: 0
Daily Windows:
Day Open Close W-Open W-Close
Sunday 000:00:00 000:00:00
Monday 017:00:00 034:00:00 041:00:00 058:00:00
Tuesday 017:00:00 034:00:00 065:00:00 082:00:00
Wednesday 017:00:00 034:00:00 089:00:00 106:00:00
Thursday 017:00:00 034:00:00 113:00:00 130:00:00
Friday 017:00:00 034:00:00 137:00:00 154:00:00
Saturday 000:00:00 000:00:00
11-21-2017 10:45 PM
It might be that its is not getting the correct CBT information from the VMware environment. Can you compare the amount of files backed up in addition to the kbytes?
11-21-2017 11:08 PM
Have a look at this TN:
11-22-2017 12:10 AM
>>The differential incremental backups always bring more or slightly less data than full backups.
Resetting Changed Block Tracking for VMware vSphere virtual machines (2139574)