topic files/directory support in Operating System - HP-UX

files/directory support

vselvaraj — Fri, 20 Oct 2000 04:59:31 GMT

Hai All,

We need some help to know the following.

1. Maximum number of users supported in a single HP-UX 11.x S800 Server.

2. Maximum number of files in a directory in vxfs filesystem in HPUX 11.x

3. Maximum number of directories in vxfs file system HPUX 11.x

Thanks in Advance,
V.Selvaraj

Re: files/directory support

Andreas Voss — Fri, 20 Oct 2000 06:31:26 GMT

Hi,

to your first question:
if you have 2-user license (check with: uname -l) you can have:
two users logged in at terminal/modem OR
one user logged in on termial/modem and unlimited users logged in via network.
Increasing licenses is only needed if you have more terminal (ie. terminal server) users logged in.

Regards

Re: files/directory support

CHRIS_ANORUO — Fri, 20 Oct 2000 07:34:25 GMT

1. The HPUX unlimited licenses for your server is available, if you have 2 user license taht does not limit users of an oracle database. It only means you can't start oracle, and more than 2 other applications through the terminals onto the system.
2. HPUX 11 supports more than 1 Trillion of filesystem and file size.
3. I have not come across a limit to number of files a directory should contain. This quota only checks for disk space usage and not number of directories.

Re: files/directory support

Paula J Frazer-Campbell — Fri, 20 Oct 2000 07:52:06 GMT

Hi
Re:- your 2nd question, whilst you can have a large number of files in a dir, the greater the number the slower your system will be. To access a particular file in a dir the system first has to know where it is stored on the disks, so the more files the longer it takes. I know I am talking in milliseconds but they all add up.
I try to keep files per directory under 1024 - difficult at times I know but well worth it.

Re: files/directory support

RikTytgat — Fri, 20 Oct 2000 08:21:00 GMT

Hi,

The maximum number of directories on a vxfs filesystem is limited by the number of inodes only.

There is another limit that is not unimportant. You can have maximum link count of 32767. This means you can only have 32765 subdirectories in a directory, because each subdirectory contains a link to the parent directory (..).

This limit is defined in /usr/include/limits.h (LINK_MAX)

Bye,
Rik.