Oracle ZFS Storage Appliance User Manual

Configuring Oracle Direct NFS (dNFS)
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_backup_file_bufsz - Size of the buffers used to process image copies
For backup and restore operations on backup sets and image copies, set the number of buffers to
64 and the buffer size to 1 MB:
SQL> alter system set “_backup_disk_bufcnt”=64;
SQL> alter system set “_backup_file_bufcnt”=64;
SQL> alter system set “_backup_disk_bufsz”=1048576;
SQL> alter system set “_backup_file_bufsz”=1048576;
These commands may be configured persistently by adding them to the SPFILE, or they may
be set dynamically in the Oracle RMAN run block used to execute the backup or restore
operations.
The following code fragments show how to dynamically tune the buffer sizes and counts for
backup and restore operations.
■
Backup set backup:
run
{<br/>
sql 'alter system set “_backup_disk_bufcnt”=64';<br/>
sql 'alter system set “_backup_disk_bufsz”=1048576';<br/>
allocate channel...
...<br/>
backup as backupset database;
}
■
Backup set restore:
run
{<br/>
sql 'alter system set “_backup_disk_bufcnt”=64';<br/>
sql 'alter system set “_backup_disk_bufsz”=1048576';<br/>
allocate channel...
...<br/>
restore database;
}
■
Image copy backup:
run
{<br/>
sql 'alter system set “_backup_file_bufcnt”=64';<br/>
Integration 633

Oracle ZFS Storage Appliance Specifications

General

Connectivity	10GbE, 40GbE, InfiniBand, Fibre Channel
Protocols	NFS, SMB, iSCSI, Fibre Channel, HTTP
Operating System	Oracle Solaris
Data Protection	snapshots, clones, remote replication
Data Reduction	Inline compression, deduplication
High Availability	Redundant hardware components (controllers, power supplies, fans). Automatic failover between controllers. Hot-swappable drives and components. Cluster configurations for increased availability and scalability.
Management Interface	Web-based GUI, CLI, REST API
Storage Type	Hybrid (SSD + HDD), All-Flash
Storage Capacity	Up to several petabytes
Encryption	AES-256 encryption at rest