topic Re: Best way to copy files in Operating System - HP-UX

Best way to copy files

Theodore Alexopulos — Wed, 30 Jul 2003 13:55:35 GMT

Which is the best (accurate and includes everything) and fastest way to copy files?

Re: Best way to copy files

Steven E. Protter — Wed, 30 Jul 2003 13:59:15 GMT

If the database is down the cp command will work just fine.

No matter what you do, you will have to know the layout of your database. For oracle the files are rarely just sitting in the same directory.

For copying between systems, avoid rcp it sometimes didn't work for me.

scp, part of Secure Shell works fine.

SEP

Re: Best way to copy files

Darren Prior — Wed, 30 Jul 2003 13:59:34 GMT

Hi,

You'll need to include a little more information... What types of files are you copying, are you copying between disks on one server, or between servers?

Personally, I tend to use the following for copying stuff between dirs on a box:

find /sourcedir | cpio -pdmuxlv destdir

regards,

Darren.

Re: Best way to copy files

Cheryl Griffin — Wed, 30 Jul 2003 14:00:28 GMT

I believe it was Bill Hassell who says the fastest way to copy is:

$ cd /source_dir
$ find . | cpio -pudlmv /destination_dir

omit v (verbose) option from cpio for more speed

Re: Best way to copy files

James R. Ferguson — Wed, 30 Jul 2003 14:01:44 GMT

Hi:

If you mean copy for backup purposes, I prefer 'fbackup'. There is automatic retry of files that cannot be backed up because they are changing at the moment of copy (although one hopes not!). There is an index of files built and written to the front of the tape which makes later examination and/or recovery ('frecover') very easy. You can do full and/r incremental backups and you can include and exclude files and/or directories with simple "graph" files. See the man pages for 'fbackup' and 'frestore' for more information.

Regards!

...JRF...

Re: Best way to copy files

Theodore Alexopulos — Wed, 30 Jul 2003 14:02:47 GMT

database files. Database will be offline. About 1 TB on same server, different storage systems.
I am worrying for
a)the integrity of data
b) all required data will be copied

Re: Best way to copy files

twang — Wed, 30 Jul 2003 14:03:50 GMT

To store a particular directory:

# fbackup -f /dev/rmt/0m -i /tmp

# find /tmp -print | cpio -oBv > /dev/rmt/0m
# find /etc | cpio -ov > /dev/rmt/0m

# tar cv /tmp ( for default device )
# tar cvf /dev/rmt/1m /tmp (specify device)

Re: Best way to copy files

Robert-Jan Goossens — Wed, 30 Jul 2003 14:03:52 GMT

Hi,

# cpio -pcmudv

Robert-Jan.

Re: Best way to copy files

Yogeeraj_1 — Wed, 30 Jul 2003 17:03:43 GMT

hi,

since it is on the same server, i would also consider doing the copy operations in parallel...

hope this helps too!

regards
Yogeeraj

Re: Best way to copy files

Tim D Fulford — Wed, 30 Jul 2003 19:35:22 GMT

copy over network....

on target machine
remsh "cd ; tar cf - | gzip - " | cd ; gunzip - | tar xf -

This will effectively create a gzipped tar image of the source & simultanously transfer it acros the network & untar it..... nice efficient & simple only in concept.....(probaly be in the offing for the Obfucated perl/tar competition)

Regards

Tim

Re: Best way to copy files

Caesar_3 — Wed, 30 Jul 2003 19:36:07 GMT

Hello!

Using tar is fast:
tar cf - | (cd ; tar xf -)

But if you will give more information about
the copy that you intresting it maybe change
the answer.

Caesar

Re: Best way to copy files

malay boy — Thu, 31 Jul 2003 02:32:11 GMT

fast?? this what we do here.I assume you trying to archive minimum down time for the database.For database cold backup,we copy the datafile to the disk.As the disk is big we used a gzip.

So the step are :

1) shutdown database.
2) copy to the disk.
3) startup database.
4) copy the disk to tape.

For a critical machine,we do :

1) shutdown database.
2) split the mirror.
3) start the database.
4) mount the split mirror.
5) backup the mirror to tape.
6) join back the mirror.

regards
mB

Re: Best way to copy files

RAC_1 — Thu, 31 Jul 2003 03:11:07 GMT

I will exclude -v options in cpio for better speed.