What is COZPROC? I don't seem to have one. -----Original Message----- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of McKown, John Sent: Tuesday, September 22, 2009 1:06 PM To: IBM-MAIN@bama.ua.edu Subject: Re: Backing Up Linux Volumes
> -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:ibm-m...@bama.ua.edu] On Behalf Of Lizette Koehler > Sent: Tuesday, September 22, 2009 2:52 PM > To: IBM-MAIN@bama.ua.edu > Subject: Backing Up Linux Volumes > > We are planning a Linux Partition under z/VM. I have been > reading a lot of manuals and articles. > > My question is - Do you backup the volumes for Linux from the > mainframe side - using something like FDR INSTANT? Or is > there a more preferred way to backup Linux volumes? > > Lizette One think to remember if you do a backup using a DASD oriented backup product that runs on a different system, is that Linux aggressively caches DASD buffers. So it is the best practice in this case to shut down the Linux system entirely until either a "snapshot" is taken or the DASD is completely dumped. Most Linux systems on Intel dump by running a client which sends the data from the local Linux instance to a "backup server" which actually writes the data to tape or another disk. Now, being the weird and cheap person that I am. If I wanted a "disk level" type backup, I would run COZBATCH to establish an SSH session to the Linux system. This would then run "dd" over the IP channel back to the z/OS batch job. I use "bzip2" to compress the data which will hopefully decrease transmission time. The JCL would look something like: //BZ2 EXEC PROC=COZPROC, // COZCFGD='TSH009.COZ125.SAMPJCL(COZCFG2)', // ARGS='powerful.linux.u...@linux.system' //STDIN DD * set -x dd if=/dev/sda1 |\ bzip2 |\ todsn -b '//DD:OUTDD1' * //OUTDD1 DD DSN=TSH009.DD.DEV.SDA1(+1), // UNIT=VTS2,LABEL=RETPD=10, // DISP=(NEW,CATLG,DELETE),VOL=(,,,100), The problem with the above is the fact that you are sending all the data over the IP network. Now, if the z/OS system and Linux system are on the same CEC, you can use Hipersockets which are much faster than the physical network. -- John McKown Systems Engineer IV IT Administrative Services Group HealthMarkets(r) 9151 Boulevard 26 * N. Richland Hills * TX 76010 (817) 255-3225 phone * (817)-961-6183 cell john.mck...@healthmarkets.com * www.HealthMarkets.com Confidentiality Notice: This e-mail message may contain confidential or proprietary information. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. HealthMarkets(r) is the brand name for products underwritten and issued by the insurance subsidiaries of HealthMarkets, Inc. -The Chesapeake Life Insurance Company(r), Mid-West National Life Insurance Company of TennesseeSM and The MEGA Life and Health Insurance Company.SM ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html NOTICE: This electronic mail message and any files transmitted with it are intended exclusively for the individual or entity to which it is addressed. The message, together with any attachment, may contain confidential and/or privileged information. Any unauthorized review, use, printing, saving, copying, disclosure or distribution is strictly prohibited. If you have received this message in error, please immediately advise the sender by reply email and delete all copies. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
