topic Re: remote backup in Operating System - HP-UX

remote backup

peterchu — Thu, 30 Dec 2004 04:47:29 GMT

I have two host eg . hostA (192.168.0.1) , hostB (192.168.0.2) , hostA has the tape drive , how can I use "tar" function at host A remote backup the files at host B ? I know dd can do that , could suggest how to make it work ? thx.

Re: remote backup

Trond Haugen — Thu, 30 Dec 2004 05:04:35 GMT

You should be able to do something like:
hostB# tar cvf - / | remsh hostA dd of=/dev/rmt/0m
(You have to run tar on hostB and have remsh working.)
If you had used fbackup it would have supported remote tape devices.

Regards,
Trond

Re: remote backup

Hoang Chi Cong_1 — Thu, 30 Dec 2004 05:31:53 GMT

Hi

You can with the fbackup command.
See on the manpage.
For example:
backup to remote machine "hostA" which has a tape drive at /dev/rmt/0m)

# fbackup -f hostA:/dev/rmt/0m -v -i /tmp/test

Of course, you have to make sure that the name resolution between both servers and in .rhosts file.
Let's see on this link:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=352809

Best and regard,
***HAPPY NEW YEAR***
HoangChiCong

Re: remote backup

Nguyen Anh Tien — Thu, 30 Dec 2004 05:56:04 GMT

I suggest you use NFS (Network File System).
On hostB you export file system you want to backup. On hostA you mount it on.
This is the guide you need:
http://docs.hp.com/en/B2355-90685/index.html
For the first time. you should do by using SAM.
I did like this many time and all were successful.
TIENNA

Re: remote backup

Eric Antunes — Thu, 30 Dec 2004 06:13:19 GMT

Hi peterchu,

The easy way to do this is with SAM from hostB:

#SAM -> Backup and Recovery -> Interactive Backup and Recovery -> Action -> Use Remote Backup Device -> Back Up Files Interactively... -> Specify Remote Backup Device... -> (Here you must enter the name of the remote server and the device file: /dev/rmt/0m).

But this will use fbackup command, not tar...

Best Regards,

Eric Antunes

Re: remote backup

Ravi_8 — Thu, 30 Dec 2004 06:21:43 GMT

Hi

NFS mount the files to be backed up from hostB on host A

tar cvf

should do

Re: remote backup

TwoProc — Thu, 30 Dec 2004 13:29:32 GMT

I'd really say that you're way better off using Trond's suggestion. Backups via NFS are painfully slow in comparision to a remsh pipe via tar to your tape drive.

For a possible speed up boost - you can try
tar cvf - /sourcedir | compress | remsh hostA "uncompress | dd of=/dev/rmt/0m"

At times, this can be a faster variant of the same idea. Depends on what you're backing up and what the bottlenecks to the transaction are.