Enabling Large File Support on an FS

[ES UNIX Team]

Hello all,

Lately, I have been having to enable large file support (greater than 2 GB) on certain filesystems, due to large DB dumps.

I am wondering if doing so will have any affect on FS/system performance. If not, would it be permissible to have this enabled on all FS's by default when installing a new system?

Thank you for the assistance,
Tom

[Patrick Wallek · Accepted solution]

As far as I know having largefiles enabled on a filesystem doesn't affect performance in any way. If any LV that you create is larger than 2GB then, yes you can enable largefiles support by default. I would not do this on any of the VG00 LVs, you should never get a file that large on VG00.

[Ajitkumar Rane]

Hello,

Enabling of largefiles option should not affect FS performace. Nest when creating a FS you can use the option of "largefile" in mkfs
eg mkfs -F vxfs -o largefiles /dev/vgxx/rlvol.
Also you need to put add this option while mounting the filesystem.In sam you have the option of large file in Modify FS defaults.

Goodluck.

[James R. Ferguson]

Hi:

The principal matter of concern when enabling largefile support is not performance (there is no penalty) but utility support. The old Unix workhorses like 'tar' and 'cpio' cannot copy files larger than 2GB. You can use 'fbackup'/'frecover', however.

Regards!

...JRF...

[ES UNIX Team]

Thanks to all for the advice.