Structure Limit (VG,LV,FS....)

[Eric Chamard]

Hi,

Who can tell me where I can find informations about the limit of Volume Group, Logical Volume, File System (size, configuration ...)
I don't find it in the HP Site.

Thank you in advance.

Thomas VERPILLOT
BOMBARDIER TRANSPORTATION

[James R. Ferguson]

Eric:

See the HP-UX Large Files White Paper:

http://docs.hp.com/hpux/onlinedocs/os/lgfiles4.pdf

...JRF...

[Rita C Workman]

A volume group can contain from 1 to 255 physical volumes.

A volume group can contain up to 255 logical volumes.

Logical volumes are divided into Physical Extents, which are by default 4mb. This value can be changed to between 1mb to 128gb (I think) upon volume group creation

File Systems can be HFS=High Performance File System; VxFS=Veritas (the preferred f/s); NFS=Network File System; CDFS=cd rom file system; or LOFS= Loopback File System.
**For file systems containing large files, you must add the option 'largefiles'.
**On newer o/s version file size maximum is 128gb....But the problem with anything over 2gb is that many utilities like backup will not work with files larger than 2gb.

/rcw

[James R. Ferguson]

Eric:

Here's a quick summary:

http://my1.itrc.hp.com/cm/QuestionAnswer/1,1150,0xcd727e990647d4118fee0090279cd0f9,00.html

...JRF...

[Daniel Proulx]

The maximum number of volume groups is a kernel configurable parameter.
Range: 1 to 256
Default: 10

See: http://docs.hp.com/hpux/onlinedocs/os/KCparam.MaxVGs.html

This is for HP-UX 11.x. The same parameter exists on 10.20. Default may be different but I would expect the range to be the same.

Daniel.