HP-UX 11i Version 2 December 2007 Release Notes

NOTE: MemFS is a Software Pack (SPK) product available on the web. It is not available on
the HP-UX 11i v2 Operating Environments (OEs) media. For more information, see “Software
Pack (Optional HP-UX 11i v2 Core Enhancements)” (page 34).
Summary of Change
MemFS v2 on HP-UX 11iv2 differs from MemFS v1 on HP-UX 11iv2 in the following ways:
• It does not require a separate swap device. It will implicitly use the system swap device for
swapping.
• It uses user process anonymous memory and buffer cache to store MemFS pages.
• Ignite-UX supports MemFS.
• MemFS filesystems can be recreated through /etc/fstab entries without preserving
content.
• Provides information of resource usage through sar and GlancePlus.
• Contains bug fixes.
Impact
MemFS v2 will allow the customer to mount a MemFS instance without the need of a separate
swap device (unlike MemFS v1).
Compatibility
MemFS v1 needs to be uninstalled before MemFS v2 is installed.
Performance
MemFS v2 performance is similar to MemFS v1 performance in non-swapping conditions.
Documentation
For further information, see the following:
• White paper: “MemFS v2 – A Memory-based File System on HP-UX 11i v2,” available at
http://docs.hp.com/en/11885/MemFSv2forHP-UX11iv2.pdf
• Administrator's Guide: HP-UX Memory File System (MemFS) 2.0 Administrator’s Guide Second
Edition, available at
http://www.docs.hp.com/en/5992-2360/5992-2360.pdf
Obsolescence
Not applicable.
HP-UX Parallel Umounts
HP-UX Parallel Umounts (UmountallCmdEnh) implements parallel unmounts.
HP-UX Parallel Umounts 139