topic COPY DATA in Operating System - HP-UX

COPY DATA

Nobody's Hero — Mon, 15 Jul 2002 13:44:42 GMT

I am in the middle of a PeopleSoft upgrade. I purchased a VA7100 so I can do the following.

Shutdown the Oracle DB's
Copy all oracle data to the new VA7100.
Let the dba's do the PS upgrade.

This way I will have all the data preserved in case we have a no-go. The time it takes to backup 200 gb and restore did not fit in our time window for the upgrade.

Question,
what is the best way, performance wise and safety wise, to copy the data from EMC local drives to the VA7100 local drives? cpio, dd, cp ?

Thanks in advance.

Bob

Re: COPY DATA

Sebastian Galeski_1 — Mon, 15 Jul 2002 13:48:39 GMT

Hi
Based on my expirience if You use filesystems cpio is the fastest, but if You use raw devices it depends on some parameters i.e. block size for dd for example. It happeneds to me that doing backup and restore of raw devices with Omniback was faster that copy by dd command from FC60 to XP256.

regards seba

Re: COPY DATA

MANOJ SRIVASTAVA — Mon, 15 Jul 2002 13:51:16 GMT

Hi Bob

Incase you are tlaking of similar types of disks ie size etc then dd is the safest best , if not then cp will also be fine but that will take longer time , I would recommend if you have the orignal disk on the EMC frame then may be you can do a BCV copy which is online and can jsut split them at the time required and then remount on the same machine or the VA7100 and then fir e the backupo from there , this wont require any or very les downtime.

Manoj Srivastava

Re: COPY DATA

PIYUSH D. PATEL — Mon, 15 Jul 2002 13:52:06 GMT

Hi,

Best is to use Omniback but if you dont have it installed then use cpio.

dd will be good if all the raw filesystems which you have created are more than 80% full. Since dd will not help much if your data in the raw filesystem is only 25% and dd will waste time for copying the rest 75% of the disk which doesnt have data.

Piyush

Re: COPY DATA

V. V. Ravi Kumar_1 — Mon, 15 Jul 2002 13:55:22 GMT

hi,

cpio

regds

Re: COPY DATA

Paula J Frazer-Campbell — Mon, 15 Jul 2002 13:57:40 GMT

Bob

If backing up disk to disk then you can run multiple copies with each doing a section of the data.

The limitation on this will be disk speed and the disk heads dealing with multiple reads and writes.

Too many sessions will slow down the copies.

It will be a trial and error I'm afraid.

If you have the data lvol mirrored (which you should have) then just split the mirror- upgrade - test - backup the mirror data - them mirror back together.

HTH

Paula