Compressed file systems in HP 11.00 ?

[Sammy_2]

Oracle Dba wants to use ORACLE RMAN to backup the entire database (40 GB) to a file system. He Wants to know if a file system can be made compressed so we would not need 40 gb disk space? How ? Any issues or overhead in doing this ?

[Pete Randall · Accepted solution]

Sam,

Files can be compressed, file systems can not. There is no way in Unix to set up a file system that will automatically compress its' contents. You could set up a cron job that would check the contents of the file system for new, uncompressed files and compress them, but that's about the only option I can think of.


Pete

[Vitek Pepas]

Pete,
I'm afraid you're wrong about "no way in UNIX".
AIX has such feature - "compressed JFS".

[Steven E. Protter]

Okay,

For HP-UX I know of no compressed filesystem. JFS is pretty efficient. Go ahead and use gzip to compress big files. It will do the job.

SEP

[Thierry Poels_1]

Hi,

Oracle 9i supports compressed tables, maybe you can play around with this feature in the rman DB (never tried this though).

An other option is to pipe an export through gzip.

But to answer the question: no compressed file systems on HPUX as far as I know.

good luck,
Thierry.

[Ramkumar Devanathan]

Pete, I think the initrd filesystem used in linux, while booting the OS, is also an example of a compressed filesystem.

http://www.handhelds.org/handhelds-faq/filesystems.html

0, please.
- ramd.

[Pete Randall]

OK, OK, I give!

Make that "There is no way I know of in HP-UX to set up a file system that will automatically compress its' contents".


Pete

[Sammy_2]

Thank You all. Just needed some confirmation that HPUX does not support Compressed FS