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Incrementals are Huge

Seth_E
Level 6

Hi there,

 

We have a policy with three schedule types:

1.) Full Monthly - Runs last day of the month.

2.) Diff Weekly - Runs on Saturday's.

3.) Incr Daily.- Runs every day

I'm finding that the incrementals are just as large as the Full. Could this be due to the fact that the full's only run once a month?  I would like to run a full every week, but, they simply take too long.

9 REPLIES 9

sri_vani
Level 6
Partner

By any chance did u verify this post

https://www-secure.symantec.com/connect/forums/there-reason-why-fulldifferential-incremental-and-cumulative-incremental-should-backup-same-a

can u please share us the bppllist <policyname> -U

Marianne
Moderator
Moderator
Partner    VIP    Accredited Certified

Also curious to see policy config...

Are you sure about schedule types?

NetBackup has two kinds of Incremental Backups:

Cumulative Incremental:
This will backup all changes this the last Full backup.

Differential Incremental:
This will backup all changes since last backup - Full or Incremental.

If you read about these schedule types in NBU Admin Guide I,  you will see that Cumulative and Differential schedules are not recommended in the same policy.

Can we assume that Incr backups are based on Archive Bit on this client?

 

Yasuhisa_Ishika
Level 6
Partner Accredited Certified

Adding to "Incrementals based on ..." setting, tell us the detail of backup target. Are you using any snapshot technology on it? Is it read-only volume?

Seth_E
Level 6

Thanks for your response. Looks like I have some reading to do in the NBU admin guide.  Yes, I have one policy and quite sure about the schedule types.  When I get to work I'll use the command line to post the schedule and policy type for further assistance.

Seth

Seth_E
Level 6

These are basic windows NTFS volumes with VSS. These are not read only targets.  Clients will be a mix of 2008 R2 and 2003.

Marianne
Moderator
Moderator
Partner    VIP    Accredited Certified

.... quite sure about the schedule types. 

 

2) Diff Weekly - Runs on Saturday's.

3.) Incr Daily.- Runs every day

 

Diff - As in Differential Incremental?
That will backup all changes since last backup - Full or Incremental ?
Meaning that Saturday's backup should only backup changes since Friday?

Incr - Is that Differential Incremental or Cumulative Incremental ?
 

Does it not make more sense to have Daily Diff and Weekly Cumulative?
(Even though Symantec recommends against having these in the same policy)

Seth_E
Level 6

------------------------------------------------------------

Policy Name:       flatfile_dev

  Policy Type:         MS-Windows
  Active:              yes
  Effective date:      01/15/2014 14:42:22
  Backup network drvs: no
  Collect TIR info:    yes, with move detection
  Mult. Data Streams:  yes
  Client Encrypt:      no
  Checkpoint:          no
  Policy Priority:     0
  Max Jobs/Policy:     Unlimited
  Disaster Recovery:   0
  Collect BMR info:    yes
  Residence:           DISK_FLAT_DLY
  Volume Pool:         Onsite_Tape
  Server Group:        *ANY*
  Keyword:             (none specified)
  Data Classification:       -
  Residence is Storage Lifecycle Policy:    no
  Application Discovery:      no
  Discovery Lifetime:      28800 seconds
  ASC Application and attributes: (none defined)

  Granular Restore Info:  no
  Ignore Client Direct:  no
  Enable Metadata Indexing:  no
  Index server name:  NULL
  Use Accelerator:  no
  Optimized Backup:  no
  HW/OS/Client:  Windows-x64   Windows2008   catorsrq2.ta1.tas-can.com
                 Windows-x64   Windows2008   catorsbd2.ta1.tas-can.com
                 Windows-x64   Windows2008   cawessbd1.ta1.tas-can.com
                 Windows-x64   Windows2008   cawessrd1.ta1.tas-can.com
                 Windows-x64   Windows2008   catorsgd1.ta1.tas-can.com
                 Windows-x64   Windows2008   catorssd1.ta1.tas-can.com
                 Windows-x64   Windows2008   cawessbq1.ta1.tas-can.com
                 Windows-x64   Windows2008   cawesspx1.ta1.tas-can.com
                 Windows-x64   Windows2008   cawessrq1.ta1.tas-can.com
                 HP9000-700    HP-UX11.11    catorscqwbd02.ta1.tas-can.com

  Include:  ALL_LOCAL_DRIVES

  Schedule:              FULL_MTHY
    Type:                Full Backup
    Calendar sched: Enabled
     Included Dates-----------
         No days of week entered
        Last day of month
     Excluded Dates----------
        No specific exclude dates entered
        No exclude days of week entered
    Synthetic:           0
    Checksum Change Detection: 0
    PFI Recovery:        0
    Maximum MPX:         1
    Retention Level:     8 (1 year)
    Number Copies:       1
    Fail on Error:       0
    Residence:           DISK_FLAT_MTHY
    Volume Pool:         (same as policy volume pool)
    Server Group:        (same as specified for policy)
    Residence is Storage Lifecycle Policy:         0
    Schedule indexing:   0
    Daily Windows:
          Sunday     18:00:00  -->  Sunday     23:00:00
          Monday     18:00:00  -->  Monday     23:00:00
          Tuesday    18:00:00  -->  Tuesday    23:00:00
          Wednesday  18:00:00  -->  Wednesday  23:00:00
          Thursday   18:00:00  -->  Thursday   23:00:00
          Friday     18:00:00  -->  Friday     23:00:00
          Saturday   18:00:00  -->  Saturday   23:00:00

  Schedule:              FULL_MANUAL
    Type:                Full Backup
    Frequency:           every 7 days
     Excluded Dates----------
        No specific exclude dates entered
        No exclude days of week entered
    Synthetic:           0
    Checksum Change Detection: 0
    PFI Recovery:        0
    Maximum MPX:         1
    Retention Level:     1 (2 weeks)
    Number Copies:       1
    Fail on Error:       1
    Residence:           DISK_FLAT_MTHY
    Volume Pool:         (same as policy volume pool)
    Server Group:        (same as specified for policy)
    Residence is Storage Lifecycle Policy:         0
    Schedule indexing:   0
    Daily Windows:

  Schedule:              DIFF_WKLY
    Type:                Differential Incremental Backup
    Frequency:           every 1 hour
     Excluded Dates----------
        No specific exclude dates entered
        No exclude days of week entered
    PFI Recovery:        0
    Maximum MPX:         1
    Retention Level:     1 (2 weeks)
    Number Copies:       1
    Fail on Error:       0
    Residence:           DISK_FLAT_WKLY
    Volume Pool:         (same as policy volume pool)
    Server Group:        (same as specified for policy)
    Residence is Storage Lifecycle Policy:         0
    Schedule indexing:   0
    Daily Windows:
          Friday     18:00:00  -->  Friday     20:00:00

  Schedule:              INCR_DLY
    Type:                Cumulative Incremental Backup
    Frequency:           every 1 day
     Excluded Dates----------
        No specific exclude dates entered
        Friday, Week 1 excluded
        Friday, Week 2 excluded
        Friday, Week 3 excluded
        Friday, Week 4 excluded
        Friday, Week 5 excluded
        Last day of month excluded
    Synthetic:           0
    PFI Recovery:        0
    Maximum MPX:         1
    Retention Level:     0 (1 week)
    Number Copies:       1
    Fail on Error:       0
    Residence:           DISK_FLAT_DLY
    Volume Pool:         (same as policy volume pool)
    Server Group:        (same as specified for policy)
    Residence is Storage Lifecycle Policy:         0
    Schedule indexing:   0
    Daily Windows:
          Sunday     18:00:00  -->  Sunday     20:00:00
          Monday     18:00:00  -->  Monday     20:00:00
          Tuesday    18:00:00  -->  Tuesday    20:00:00
          Wednesday  18:00:00  -->  Wednesday  20:00:00
          Thursday   18:00:00  -->  Thursday   20:00:00
          Friday     18:00:00  -->  Friday     20:00:00
          Saturday   18:00:00  -->  Saturday   20:00:00

 

Yasuhisa_Ishika
Level 6
Partner Accredited Certified

Size of Cumulative Incremental backups are always same with Full on all the clients? Or it occasionally happen?

Adding to fixing incremental type, please do not mix calender based schedules and frequency based schedules in single policy as it may result in unexpected schedule running. Consider to use calendar based scheduling for all.

Jim-90
Level 6

What is the application(s) on the boxes?   Some applications do optimisation under the hood this could affect the size of the backup.  

Turn off move detection - if the backups are significantly smaller this means the application is shuffling files around.  

Are there any scripts changing file metadata? I've seen ACL scripts mess with non-full backups.