large file support

[kamal_9]

Hi can any one tell me how to find out weather the filesystem supports large file and long file name support or not ?

[john korterman · Accepted solution]

Hi,

try:
# fstyp -v

if:
f_flag: 16 -->supports large files
f_flag: 0 -->no support for large files

and eventualy test by creating a large file by the prealloc command, e.g.:
# prealloc mybigfile 2200000000

I think that you can make filenames as long as 255 characters. How long do you need them?

regards,
John K.

[Ranjith_5]

try
dbnode:toor-/>fstyp -v /dev/vg21/lvol4
vxfs
version: 4
f_bsize: 8192
f_frsize: 8192
f_blocks: 10483712
f_bfree: 8114032
f_bavail: 8050642
f_files: 2028512
f_ffree: 2028480
f_favail: 2028480
f_fsid: 1075118084
f_basetype: vxfs
f_namemax: 254
f_magic: a501fcf5
f_featurebits: 0
f_flag: 16
f_fsindex: 7
f_size: 10483712

Regards,
Syam

[Ivajlo Yanakiev]

fsadm -F vxfs /dev/vg02/lvol1

replace /dev/vg02/lvol1 with your FS

[kamal_9]

Hi
If the large file support is not enabled
How to enable it . Can i do it just buy umounting the filesystem .wht will happen to the data.
Is this Largefile support same for
1.simple lvm with hfs
2.Vertitas vaolume manager
3. Online JFS

[Pete Randall]

fsadm -F vxfs -o largefiles /dev/vg02/lvol1


Pete

[Jean-Luc Oudart]

Answer in a previous thread

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=118006

Regards
Jean-Luc

[Pete Randall]

To answer the rest of your question, largefile support is the same for HFS or VxFS, VxVM or LVM, and OnlineJFS.


Pete

[Ranjith_5]

Hi Kamal,

Assuming that you have licenced online JFS installed on your system:-

To find a file system supports large file or not use:

#fsadm -F vxfs /

output will be either largefiles/nolargefiles

To convert a HFS file system from a nolargefiles file system to a largefiles file system:

#fsadm -F hfs -o largefiles /dev/vgxx/

For more info. Pls see:

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

Regards,
Syam