Overview of HP-UX 11.0

The HP-UX 11.0 release includes a 64-bit version and a 32-bit version of the operating system. This release of the operating system:

Provides 64-bit addressing when the 64-bit version of HP-UX is installed on HP 64-bit hardware platforms. This enables programs to take advantage of very large address spaces and larger physical memory limits.
Provides kernel level threads for maximum efficiency of multi-threaded applications.
Complies with the latest NIS+ (Network Information Service) and NFS PV3 de facto standards for more secure network name services and larger network file systems.
Runs in 32-bit mode on HP-UX 32-bit hardware platforms and in either 32-bit or 64-bit mode on HP-UX 64-bit hardware platforms.
Supports run-time execution of both 32-bit and 64-bit applications on HP-UX 64-bit platforms.
Supports inter-process communication between 32-bit and 64-bit applications via message queues, pipes, shared memory, and networking protocols.
Provides a cross-platform development environment for developing 32-bit and 64-bit applications.

The following table shows the evolution of recent HP-UX releases:

Table 1-1 Capacity Limits of Recent HP-UX Releases

Attribute	10.01	10.10	10.20	64-bit 11.0
File System	4 GB	128 GB	128 GB	128 GB
File Size	2 GB	2 GB	128 GB local, 2 GB network	128 GB local and network
Physical RAM	2 GB	3.75 GB	3.75 GB	4 TB
Shared Memory	1.75 GB	1.75 GB	2.75 GB	8 TB
Process Data Space	.9 GB	1.9 GB	1.9 GB	4 TB
# File Descriptors	2 K	60 K	60 K	60 K
# of User Ids	60 K	60 K	~2,000 K	~2,000 K

Technical documentation