Does that apply to all hardware vendors for the DB2 BACKUP/RESTORE or only the IBM DS8K family?
Lizette > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] > On Behalf Of Glenn Wilcock > Sent: Wednesday, April 29, 2015 8:06 AM > To: IBM-MAIN@LISTSERV.UA.EDU > Subject: Re: Thoughts on DFSMShsm ABARS in today's environment > > Hi Again, > > As you can imagine, over the years our L2 folks have been called out to help > recover data after many an 'oops'. In many cases, there isn't a backup for > all > of the data, which has resulted in data loss. Hence, most will concur that > any > backup is better than no backup. > > For the case of backing up Online Systems, investigate what the applications > themselves offer. In the case of DB2, DB2 and DFSMS have worked together > to create a Continuous Data Protection solution (CDP) through the DB2 > BACKUP SYSTEM / RESTORE SYSTEM utilities. BACKUP SYSTEM creates a > fuzzy backup that can be made consistent during recovery through Log > Applies. In order to create a consistent recovery, > creates/renames/deletes/extended must be quiesced during the backup, > but data updates are allowed to continue. (Essentially VTOC updates are > held to ensure that the VTOCs are data consistent). DB2 invokes DFSMShsm > to create FlashCopy PiT backups (FRBACKUP). During Recovery, the client > selects the recovery point, which can be 'current', or a prior point in time. > DFSMShsm recovers the PiT copy using FlashCopy (if still on disk) or from > Tape (if the backup copy has rolled off to tape). DB2 then performs a log > apply up to the recovery point, creating a data consistent recovery. Some > clients also use this process to create Clones. When this CDP solution is > combined with Metro Mirror, there is a very high level of protection from > both physical and logical loss. This solution can also be used for SAP > systems, > when DB2 is the database. > > Glenn Wilcock > DFSMShsm Architect > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
