HP StorageWorks 6000 HP StorageWorks VLS and D2D Solutions Guide (AG306-96028, - Page 197
Symantec NetBackup, NetBackup General Guidelines
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for i in `seq 0 3`; do if [ ${DRVBSY[$i]} -eq 0 ] then /usr/omni/bin/omnimm -recycle $BARCODE /usr/omni/bin/omnimm -export $BARCODE /usr/omni/bin/omnimm -import ${DRVNAME[$i]} -slot $BCSLOT & DRVBSY[$i]=1 break fi done if [ ${DRVBSY[0]} -eq 1 ] && [ ${DRVBSY[1]} -eq 1 ] && [ ${DRVBSY[2]} -eq 1 ] && [ ${DRVBSY[3]} -eq 1 ] then wait DRVBSY=( 0 0 0 0 ) fi done wait The above basic example script template can be extended to add error handling or support for multiple libraries, etc. Symantec NetBackup This section includes both general and deduplication guidelines as well as other useful information for Symantec NetBackup. NetBackup General Guidelines The following NetBackup guidelines apply to a VLS regardless of whether deduplication is enabled or disabled: • HP VLS Library Emulation: When configuring the VLS for use with NetBackup, select "HP VLS" as the library emulation. NetBackup requires the use of this emulation in all HP StorageWorks VLS products for device support purposes. • Barcode formats: When configuring the barcode formats for the virtual cartridges, do not exceed eight characters. • Disable multiplexing: Even though multiplexing is supported, HP does not recommend it for virtual libraries because of the performance impact on restores and deduplication. Because you can create additional drives easily in the virtual library and allocate them to Media Servers as necessary, sufficient backup streams can be concurrently written without requiring multiplexing. Be aware of the Netbackup Device Manager limitation of 128 tape drives per media server. • Tape block size: Set the tape block size to 256 KB (maximum supported size) using /netbackup/db/config/SIZE_DATA_BUFFERS. • Storage unit fragment size: Set the storage unit fragment size to default, 1TB, with the box unchecked. • Enable multi-streaming: Multi-streaming (a backup job concurrently writing to multiple virtual tape drives) provides efficient use of bandwidth when data objects reside on different physical disks/arrays. • Avoid multiple retention periods per cartridge: Avoid mixing different retention periods on the same cartridges; this is off by default. • Number buffers: Set the number of data buffers to 32 or 64 using /netbackup/ db/config/NUMBER_DATA_BUFFERS. HP StorageWorks VLS and D2D Solutions Guide 197
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