Slow performance on Disk Storage Units, Disk Staging Storage Units or Deduplication Storage

Article:TECH35968  |  Created: 2004-01-07  |  Updated: 2011-09-16  |  Article URL http://www.symantec.com/docs/TECH35968
Article Type
Technical Solution

Product(s)

Environment

Issue



Slow performance on Disk Storage Units, Disk Staging Storage Units and Deduplication Storage


Solution



Increase the data buffers used by the NetBackup disk manager process (bpdm) on master and media servers.
The default buffer size for bpdm (disk backups) is 262144 (256K). A better value is 1048576 (1MB).

Create the following file:
Windows: <install_path>\NetBackup\db\config\SIZE_DATA_BUFFERS_DISK
*nix: /usr/openv/netbackup/db/config/SIZE_DATA_BUFFERS_DISK
Add the value 1048576 into the file.
 
Create the following file:
Windows: <install_path>\NetBackup\db\config\NUMBER_DATA_BUFFERS_DISK
Create  /usr/openv/netbackup/db/config/NUMBER_DATA_BUFFERS_DISK
Add the value 64 into the file.

No restart is needed for NetBackup after these files are created.

If Status 89 is now seen on the backups, increase the system's shared memory value in the kernel settings and then reboot the system. For a workaround on the Status 89, temporarily reduce the values above in the buffer files and retry the backup.

Supplemental Materials

Value45750
Description

Tuning for both disk and tape storage unit writes



Legacy ID



273532


Article URL http://www.symantec.com/docs/TECH35968


Terms of use for this information are found in Legal Notices