What OS capacity limits exist? Updated: 12/11/02


Attribute 10.01 10.10
==================================================
Physical RAM: 2 GB 3.75 GB
Shared Memory: 1.75 GB 1.75 GB
Process Data Space: 0.9 GB 1.9 GB
# File Descriptors: 60,000 60,000
# User Ids: 60,000 60,000
CPUs: ? ?

10.20,
Attribute 32-bit 11.0/11i 64-bit 11.0/11i v1.x
===============================================================
Physical RAM: 3.75 GB 256 GB
Shared Memory: 2.75 GB 512 GB?
Process Data Space: 1.9 GB 256 GB?
# File Descriptors: 60,000 60,000
# User Ids: 2,147,483,647 2,147,483,647
CPUs: 16? 32/64

Attribute 11i v2.x
======================================
Physical RAM: 1 TB
Shared Memory: 2 TB?
Process Data Space: 1 TB?
# File Descriptors: 60,000
# User Ids: 2,147,483,647
CPUs: 128

Beginning with Release 10.10, the supported sizes for files and file
systems on HP-UX have gradually increased. Below is a summary of the
supported sizes for Releases 10.01 through 11i.

NOTE: Although it may be possible to create files or file systems larger
than these documented limits, such files and file systems are not
supported, and the results of using them may be unpredictable.

HFS Supported Sizes
===================
The maximum file and filesystem sizes supported by HFS are listed in the
table below.

TABLE 1. HFS Supported File and File System Sizes
====================================
HP-UX File Filesystem
Release Size Size
====================================
10.01 2 GB 4 GB
10.10 2 GB 128 GB
*10.20,11.x 128 GB 128 GB
====================================

* On these releases it is possible to exceed the 128 GB limit to 256
GB, but it is not supported.

JFS (VxFS) Supported Sizes
==========================
The maximum file and file system sizes supported by the Journaled File
System (JFS), also known as the VERITAS File System (VxFS), are listed in
the table below.

TABLE 2. VxFS Supported File and Filesystem Sizes
==============================================================
HP-UX JFS Disk Layout File Filesystem
Release Version Version Size Size
==============================================================
10.01 - Version 2** 2 GB 4 GB

10.10 - Version 2** 2 GB 128 GB

10.20 Version 3.0 Version 2 2 GB 128 GB
10.20 Version 3.0 Version 3** 128 GB 128 GB

11.00 Version 3.1 Version 2 2 GB 128 GB
*11.00 Version 3.1 Version 3** 1 TB 1 TB

11.00 Version 3.3 Version 2 2 GB 128 GB
11.00 Version 3.3 Version 3** 1 TB 1 TB
11.00 Version 3.3 Version 4 1 TB 1 TB

11i Version 3.3 Version 2 2 GB 128 GB
11i Version 3.3 Version 3 2 TB 2 TB
11i Version 3.3 Version 4** 2 TB 2 TB
11i v2.x Version ? Version ? 4 TB 4 TB
==============================================================
* PHKL_22719 is needed to avoid mount problems if extending
or creating file systems beyond 128 GB.

** default disk layouts for particular HP-UX Releases.

Related JFS Patches
===================
On HP-UX 10.20, several patches have been introduced to prevent the
creation or extension of JFS filesystems beyond the supported maximum
size of 128 GB:

o PHCO_23035 - extendfs_vxfs(1M) cumulative patch
o PHCO_23036 - fsadm_vxfs(1M) cumulative patch
o PHCO_23037 - mkfs_vxfs(1M) cumulative patch

Corresponding patches for HP-UX 11.00 and 11i are being prepared. The
patch numbers were not known when this document was written. For the
latest information about available patches, see the IT Resource Center:

o <http://ITresourcecenter.hp.com/>

If you have a support contract, select Browse Support Info By Product.
If
you do not have a support contract, select Individual Patches to search
the Patch Database. Then select HP-UX Patches, select 11.00 or 11i or
11.11 as the OS version, and search for the keyword JFS to get a list of
JFS patches.

NOTE: You must register with the IT Resource Center to search the
patch database



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