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Veritas Access Solutions Guide for NetBackup

Last Published: 2020-10-01

Product(s): Access (7.4.2)

Platform: Linux

Configuring Veritas Data Deduplication using the Veritas Access command-line interface (CLI)

This section describes how you can configure Veritas Data Deduplication using the Veritas Access command-line interface.

You can use the dedupe> config command to configure the deduplication storage server using the given set of file systems and IP address.

Prerequisites:

The file system should be already created and the IP should be online before you start deduplication. The file system is used to store the deduplicated data and its metadata. The deduplication storage server uses the specified IP address to receive the backup data from NetBackup.
Modify the following tunables:
/sys/kernel/mm/transparent_hugepage/khugepaged/defrag is set to "0"
/sys/kernel/mm/transparent_hugepage/defrag is set to "always madvise [never]"

Set the following values in the /etc/sysctl.conf file:

kernel.numa_balancing = 0 
vm.overcommit_memory = 2 
vm.min_free_kbytes = 2097152 
vm.max_map_count = 262144
vm.overcommit_ratio = 90

To configure the deduplication storage server

To configure the deduplication storage server, enter the following:
```
dedupe> config filesystem1 [, filesystem2,...] IP username
```
Where:
filesystem1, filesystem2,...
Specifies the file system names.
IP
Specifies the interface IP.
username
Specifies the user name.
You are prompted to enter your password. After you specify your password, Veritas Data Deduplication is configured.
Note:
You have to use the same password when you configure the storage server on NetBackup.

Note:

If you want to configure deduplication with an IPv6 IP, you are required to have an FQDN entry which resolves to the specific IP. The FQDN should be resolvable on both Veritas Access and NetBackup. You can either have a DNS entry or you can add an entry in the /etc/hosts file on all the nodes to resolve the FQDN to a specific IP.

Note:

If you have to reconfigure deduplication, you are required to provide the first file system which has the dedupe directory inside the /vx/fsname/ directory using the same user name and password that you used when you initially configured deduplication.

To start the deduplication storage server

The storage server is started on the node on which the virtual IP, which you specified in the dedupe> config command is online.
To start the deduplication storage server, enter the following:
```
dedupe> start
```
The deduplication storage server should be already configured before you start the deduplication storage server.

To display information the deduplication storage server

To display information about the deduplication storage server, enter the following:
```
dedupe> show
```
The information includes the file system(s) being used, the IP, and the cluster node on which the server is running.

To display the deduplication storage server statistics

To display the deduplication storage server statistics, enter the following:
```
dedupe> stats
```
The information includes details like total storage size, free storage, and deduplication ratio. The deduplication storage server should be online for this operation.

To show the status of the deduplication storage server

To show the status of the deduplication storage server, enter the following:
```
dedupe> status
```
The information includes whether the server is running and the cluster node on which the server is running.

To stop the deduplication storage server

To stop the deduplication storage server, enter the following:
```
dedupe> stop
```
The deduplication storage server must be configured and running. If any backup job is running when the server is stopped, the job aborts with an error.

To increase the storage capacity of the deduplication storage server

To increase the storage capacity of the deduplication storage server to the given size, enter the following:
```
dedupe> grow size
```
The deduplication storage server should be online for this operation.

To add a new user to the deduplication storage server

To add a new user to the deduplication storage server, enter the following:
```
dedupe> adduser username
```
The user name that is mentioned here is the NetBackup media server user name which you use later to configure the storage server on the NetBackup server.

To show the list of users of the deduplication storage server

To show the list of users of the deduplication storage server, enter the following:
```
dedupe> listuser
```

To unconfigure the deduplication storage server

To unconfigure the deduplication storage server, enter the following:
```
dedupe> unconfig
```
The file system(s) and the deduplicated data stored on it are not destroyed.

See the dedupe man page for more information.

filesystem1, filesystem2,...	Specifies the file system names.
IP	Specifies the interface IP.
username	Specifies the user name.