Dell PowerVault DR4100 Manuel de bonnes pratiques - Page 11

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Dell PowerVault DR4100 Manuel de bonnes pratiques

For NFS shares, it is recommended that root user be set to nobody and that NFS shares are further locked down by the IP

or DNS name of the machines that are allowed to connect to that container.

4.4.3

Marker Support

Many DMAs add metadata into the backup stream to enable them to find, validate and restore data they wrote into the

file. This metadata makes the data appear unique to dedupe enabled storage. In order to properly dedupe the data, the

markers need to be removed before the stream is processed.

In the DR, markers are set on a container level and are set to auto by default. This allows all known detected markers to

be stripped before the data is processed. In situations where the DMA does not have markers, or the DMA is known, a

slight performance increase can be had by setting the markers correctly.

If the DMA in use is BackupExec or Netbackup the marker should be set to none. For other DMAs such as Commvault,

Networker, Arcserve, or any of the other supported markers, set the marker to the type that corresponds to the

appropriate DMA.

Note: Changing the marker type after data is ingested could make the data appear unique, causing dedupe savings to be

adversely impacted until all ingested data with the previous marker is removed. To avoid this problem, the proper

marker should be set on containers from the start.

DR4100 Best Practice Guide | April 2014