topic Re: Compression? in Operating System - HP-UX

Compression?

Mark Duffy — Wed, 08 Nov 2000 10:16:47 GMT

I want to use make_net_recovery to store on a newly setup Ignite server. vg00 of the server I want to make an image of is 8Gb is size currently using 5848MB. What size will the make_net_recovery to be stored be? What sort of compression does Ignite use?

Any info appreciated.

Re: Compression?

Lasse Knudsen — Wed, 08 Nov 2000 10:29:11 GMT

Ignite uses (standard) gzip.

How much space you need depends on what data you have.

Text files can be compressed as much as 90% - binary files usually 40% compressed files/jpg/mpg is not compressable at all. 40% is a good overall estimate.

Re: Compression?

Lasse Knudsen — Wed, 08 Nov 2000 10:31:28 GMT

Ups the calcution:

5848 - 40% = 3508MB

Re: Compression?

Vincente Fernandes — Wed, 08 Nov 2000 10:33:29 GMT

Ignite used dd for creating the make_recovery. The size will depend up what directory/data is included in the make_net_recovery process. It shouldn't take more then 5848MB assuming you want to include everything of vg00.

Re: Compression?

Kofi ARTHIABAH — Wed, 08 Nov 2000 10:34:08 GMT

If you do not use the -A option , make_recovery will back up only the OS component of vg00 - that comes to approximately 400MB. If you use the -A option with make_recovery, then it will back up all the data on vg00.

I would suggest that in your case you use make_recovery (without the -A option) and then backup using fbackup for the rest of the data.