best way to copy files

[matthew mills]

I am trying to copy a directory from one HPUX 11.00 to another HPUX 11.00. I do this daily and it is very slow.

rm -r /oradata/*
rcp -pr ngbva:/oradata .

is there a better way? please give me a sample script.

Thanks in advance.

[Sanjay_6]

Hi,

You can use any other utility like scp / ftp. But it might still be slow. The whole thing depends on the network speed. Maybe the bottleneck is your network.

also if both your servers are 100 Full Duplex, make sure the server network port as well as the switch is set to 100 Full Duplex / Fixed and there is no auto-neg enabled / involved.

Hope this helps.

Regds

[Sridhar Bhaskarla]

Hi Matthew,

since 'rcp' is unsecured anyway, try 'ftp' manually and measure the difference. If you find it (it should be) faster, you can script it.

I would suggest you setup ssh on both the boxes, setup public/private key authentication and use 'sftp' non-interactively. It is secured and doesn't require passwords to be supplied or hardcoded in any files.

-Sri

[Dietmar Konermann]

Obviously you are copying database files... maybe a good idea to use compression when copying over the network then.

e.g. with tar (max 8GB files with recent tar patch level):

remsh ngbva "cd /oradata && tar cf - . | gzip --fast" | gzcat | tar xvf -

Best regards...
Dietmar.

[matthew mills]

can I compress the file before sending it without taking up space on the host

[Steven E. Protter]

Best and most secure.

scp/sftp

authentication is secure which is better than ftp.

You can get better tranfser rate and less network traffic by using gzip ahead of time. There is a substantial price in overall processing and transfer time because gzip is quite efficient, but its not all that fast.

SEP

[Robert-Jan Goossens_1]

Dietmar is using compression in his command (gzcat)
Regards,
Robert-Jan

[Paul Cross_1]

rsync is another (albeit insecure) option if you trust your network.

[matthew mills]

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