Veritas File System 5.0.1 Release Notes

cache size specified in the global (static) tunable, vxfs_bc_bufhwm. If the value of
vxfs_bc_bufhwm is set to zero, VxFS automatically tunes the maximum size of the metadata
buffer cache at boot time, based on the system memory size. On systems with a RAM size
of 1 GB or less, you can manually tune down the value of vxfs_bc_bufhwm to a minimum
of 6144 (6 MB). If the user does not manually tune the value of vxfs_bc_bufhwm then VxFS
calculates vxfs_bc_bufhwm value based on system memory. VxFS ensures that the value
of vxfs_bc_bufhwm is not less than 800 KB.
For more information on tuning VxFS, see the following documents available at http://
www.docs.hp.com:
• Common Misconfigured HP-UX Resources
• Veritas File System 5.0.1 Administrator’s Guide
NOTE: VxFS consumes a fixed percentage of memory for storing the default values of tunables,
such as vx_ninode and vxfs_bc_bufhwm. For example, VxFS consumes nearly 10% of the
total physical memory for the default value of vx_ninode. If the system has 512 MB of memory,
VxFS requires up to 52 MB to store the VxFS inode cache. Therefore, it is necessary to tune the
tunables according to the type of the load on the system.
Product Licensing
Following are the features enabled by the HP OnlineJFS and HP Serviceguard Storage
Management licenses:
• HP OnlineJFS License
Table 1-1 lists the features enabled by the HP OnlineJFS license.
Table 1-1 Features Enabled by HP OnlineJFS
LicenseFeature
HP OnlineJFSVeritas File System
HP OnlineJFSFile Change Log – Logs file system activity for fast incremental
backup and auditing.
HP OnlineJFS
Online FileSystem Operations (fsadm)
— File system resize
— File system defragmentation
— Single file or directory defragmentation
— File System intent log resize
HP OnlineJFSMounting
— Forced unmount of a file system (vxumount -oforce)
— Snapshot mounts (mount -osnapof)
— Mount with special mount options such as convosync,
unbuffered, direct and so on.
— Nested Mounts
HP OnlineJFSDMAPI – A VxFS interface that enables Hierarchical Storage
Management (HSM) also known as XDSM.
HP OnlineJFSFile systems up to 256 TB
HP OnlineJFS and SG-SMSConcurrent I/O database accelerator
HP OnlineJFSNamed Streams
For information on supported file systems and large file support, see the Supported File and
File System Sizes for HFS and JFS whitepaper available at:
8 Veritas File System 5.0.1 Release Notes