Dell DR4100 Symantec NetBackup - Setting up the DR Series System on Symantec N - Page 84

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Setting up the Dell™ DR Series System on Symantec™ NetBackup™ | July 2015

4.

Calculate the data footprint during the retention period for existing data sets based on a 10-1

deduplication ratio

5.

Calculate the data footprint during the retention period for change rate data sets based on a 10-1

deduplication ratio

6.

Calculate the ratios within the retention period for each of the data sets

7.

Determine the lowest ratio data set to be retired within the retention period and create media of size

that closest matches this data footprint so that when a retention period is met the most amount of

media is recycled to invoke data reclamation alignment and optimizing media consumption.

IMPORTANT

: If other containers are being configured to host CIFS/ NFS / RDA or OST, these must also be

factored into the planning and management of space.

B.2.3

Logical VTL geometry and media sizing

The logical size of the VTL including media size and media count should be made such so as to

accommodate the existing data footprint targeted for protection. The calculation for such should include the

initial footprint, change rate and retention period. It should also take in account the size of both full and

incremental data sets. Using the smallest iteration of the data sets to dictate the logical size of the VTL media

affords users the ability to retire media in smaller increments which results in high levels of use and also

provides the users the ability to conduct operations across smaller objects which results in higher levels of

flexibility such as when a restore is needed during backup operations.

We can review a typical full weekly plus incremental daily example to demonstrate one method of

conducting this calculation. In our example the total logical foot print for the customer environment is 20TB

and with a 10% change within a weekly recovery point objective period for a complete weeks’ worth of

protection we calculate that we will require 22TB of total logical media to retain the data footprint for the

given environment for one week. In order to allow for disparities we also include a 10% increase to allow for

flexibility in the deployment and use of the VTL which results in a 24.2TB total virtual media requirement for a

single weekly retention period.

Important Note

:

Media can always be added as needed. Media cannot, however, be deleted, so care must

be taken to avoid creating too many media items.

In the previous example, at the end of the 5-week cycle the 1

st

week retires and frees up media to be reused

or recycled, which once processed will allow the DR Series system to reclaim the physical space associated

with the virtual media. Since the smallest data set footprint resulting from the change rate is 2TB in each

incremental iteration, we create our media at 800GB increments and add as we grow. For this example, the

initial VTL would be created with

152

(

121TB divided by 800GB

) pieces of media at

800GB

for each piece

media.

Section	Page
1 Installing and configuring the DR Series system for use with Symantec NetBackup	6
1.1 Symantec NetBackup prerequisites	6
1.2 Installing and configuring the DR Series system	6
2 Configuring a CIFS or NFS target container	10
2.1 Setting up Symantec NetBackup storage units - Windows	12
2.2 Setting up Symantec NetBackup storage units - Unix/Linux	16
2.3 Creating a new backup job with the DR Series system as the target	17
2.4 Setting up native replication & restore from the target container	23
2.4.1 Building the replication relationship between two DR Series systems	23
2.4.2 Backing up the image to the source DR Series system	27
2.4.3 Cleaning up the image from NetBackup	29
2.4.4 Importing the image from the target DR Series system	30
2.5 Restoring the image from the target DR Series system	33
3 Creating and configuring OST target container(s) for NetBackup	35
3.1.1 Setting up NetBackup for virtual synthetic backup on a Windows or Linux client	36
3.1.2 Backing up using NetBackup virtual synthetic backup	49
4 Configuring VTL type containers for use with Symantec NetBackup	52
4.1 Creating and configuring NDMP target container(s) for NetBackup	52
4.1.1 Creating the NDMP VTL container	52
4.1.2 Setting up NetBackup to use the newly created NDMP VTL	54
5 Setting up the DR Series system cleaner	76
6 Monitoring deduplication, compression, and performance	77
A Creating Symantec NetBackup storage units for CIFS and NFS	78
A.1 Creating a storage unit for CIFS	78
A.2 Creating a storage unit for NFS	80
B VTL configuration guidelines	81
B.1 Managing VTL protocol accounts and credentials	81
B.1.1 iSCSI Account Details and Management	81
B.1.2 NDMP account details and management	82
B.1.3 VTL default account summary table	83
B.2 Managing VTL media and space use	83
B.2.1 General performance guidelines for DMA configuration	83
B.2.2 Physical DR space sizing and planning	83
B.2.3 Logical VTL geometry and media sizing	84
B.2.4 Media retention and grouping	85
B.2.5 VTL media count guidelines	85
B.2.6 Adding media to a VTL container	86
B.2.7 Updating NetBackup to identify newly added VTL media	86

Dell DR4100 Symantec NetBackup - Setting up the DR Series System on Symantec N - Page 84

B.2.3 Logical VTL geometry and media sizing, IMPORTANT, Important Note, 800GB

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