HP StoreOnce Backup System Concepts and Configuration Guidelines (BB877-90913, November 2013)

• Each NAS share has a 25,000 file limit, some backup applications create large numbers of
small control files during backup to disk. If this is the case , it may be necessary to create
additional shares and distribute the backup across multiple shares.
• Disable software compression, deduplication and synthetic full backups.
• Do not pre-allocate disk space for backup files within the backup application.
• Best throughput is achieved with multiple streams, the actual number per device/appliance
varies by model.
• For NFS shares ensure the correct mount options are used to ensure in-order delivery and
provide better deduplication ratios. See the HP StoreOnce Linux and UNIX Configuration
Guide for specific details.
• Configure bonded network ports for best performance.
• Monitor the number of files created in the share at regular intervals as there is a 25,000 file
limit per share
• For CIFS shares the recommended implementation is using AD authentication (see later)
• For NFS shares there is a specific mount option which ensures all data to the NFS share is
sent “in order” – which enables the best deduplication ratio. The name of the mount option
varies according to the operating system; some operating systems also require an update
package to be installed to enable this. See the HP StoreOnce Linux and UNIX Configuration
Guide for more details.
76 NAS shares