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Conference decwet::networker

Title:	NetWorker
Notice:	kits - 12-14, problem reporting - 41.*, basics 1-100
Moderator:	DECWET::RANDALL.com::lenox

Created:	Thu Oct 10 1996
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	750
Total number of notes:	3361

732.0. "Backup 140gb/hr database." by TLAV01::PARNUPHAN () Tue Jun 03 1997 05:14

    Hello,
    	I have a requirement from customer to backup 280GB of Data in 2 Hr.
    The database is Informix ,the backup method is to run 5 different backup
    instances at the same time.
    The propose hardware is 8400 5/440 4cpus 2GB memory /UNIX & NSR  4 HSZ50 
    w / rz29b x 100 units. 
    How can I configure tape to achieve the requirement with smallest cost?
    
    Best regards,
    Parnuphan

T.R	Title	User	Personal Name	Date	Lines
732.1		DECWET::ONO	Software doesn't break-it comes broken	`Tue Jun 03 1997 09:16`	28
	It would help to know more detail about how the disks are connected to the system to make sure there isn't a disk bottleneck. In particular, SCSI adapters - what kind (KZPSA?) and how many (at least 4)? Disks - how are the distributed amongst the HSZs? I also need to make a couple more assumptions: You're backing up to locally connected tape. The database is shut down during the backup. The database data is at least 2:1 compressible. (If it is less compressible, you will need more tape drives. Give that these are all reasonable, you should be looking at five or six TZ89 drives to deliver 140 GB/hr (~40 MB/sec). I think your best bet might be a TL896, with 176 cartridges and 6 TZ89 drives. You'll need at least three KZPSA to connect the TL896 to the system, using one SCSI bus per pair of tape drives. You can also look at the performance/sizing guidelines in note 43. Hope this helps, Wes
732.2		mjbclient.zso.dec.com::kowalski	Official Beer Test Dummy	`Tue Jun 03 1997 09:55`	2
	My recommendation would be to use 1 TZ89 per KZPSA so the adapter is not a bottleneck.
732.3	one additional point	DECWET::EVANS	NSR Engineering	`Tue Jun 03 1997 17:16`	8
	since this is an Informix Database backing up, you cannot use any other NetWorker tool than save, or perhaps the raw disk (rawasm) save to do it, which means shutting down the Database to do backups. Also, perhaps, check out the recent white paper (or white paper to be) from ADABAS AG backing up an Informix Database on an 8400 - sadly, I do not know of a published location for said white paper - contact Paul Krneta for details ([email protected])