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07-10-2002 04:07 AM
07-10-2002 04:07 AM
Have an issue with speed and are considering switching to Omniback but still using a DLT8000.
Could anyone advise as to what sort of performance impact this could have ?
Just need a ball park indication to help sweeten management into letting me eval the product.
Many thanks
Alun
Solved! Go to Solution.
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07-10-2002 04:26 AM
07-10-2002 04:26 AM
Re: fbackup v Omniback
I'm not sure if you are going to see a huge impact in performance because it depends on how you were using fbackup and what you were backing up.
live free or die
harry
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07-10-2002 04:30 AM
07-10-2002 04:30 AM
Re: fbackup v Omniback
for example you could use concurrent disk agents for different file systems to do your backups with Omniback. Run one disk agent on every filesystem and let them all write to one tape device to speed up your backups.
Allways stay on the bright side of life!
Peter
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07-10-2002 04:36 AM
07-10-2002 04:36 AM
Re: fbackup v Omniback
I am looking at a full backup every night onto a single tape in a DLT8000. I am not looking to change the hardware, only the software.
Has anyone switched from using fbackup to Omniback and has experience of the change ?
Appreciative as always.
Alun
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07-10-2002 04:43 AM
07-10-2002 04:43 AM
SolutionWhich performance do you get with fbackup. If you can stream the DLT 8000 at full speed (about 12 MB/s with 2-1 compression) you can't expect better performance with OmniBack. But if not, you have better chance with OmniBack (with concurrent filesystem backup) to get max performance out of your DLT drive.
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07-10-2002 05:39 AM
07-10-2002 05:39 AM
Re: fbackup v Omniback
I think, some more items should be thought about.
1st
OmniBack GUI is very comfortable, once you get it running. Setup may give some headache.
2nd
You can run one backup on several tapedrives ( if licenced ).
You can spread the different filesystems through the tape drives manually or by load balancing option.
You can choose the load on the network ( that works on your machine as well ).
3rd
MONEY !
OmniBack is not a cheap product to buy and maintain.
Hope, i gave some ideas.
Rgds
Alexander M. Ermes
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07-10-2002 06:40 AM
07-10-2002 06:40 AM
Re: fbackup v Omniback
blocksperrecord 256
records 32
checkpointfreq 1024
readerprocesses 6
maxretries 5
retrylimit 5000000
maxvoluses 200
filesperfsm 2000
Omniback's primary value is in backup management, things like multiple systems, multiple tape drives, changer support, and most important: preventing loss of data by using the wrong tape for backup or restore.
Bill Hassell, sysadmin
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07-15-2002 01:07 AM
07-15-2002 01:07 AM
Re: fbackup v Omniback
The data goes through: disk -> scsibus -> systembus -> memory -> systembus -> scsibus -> DLT
The speed for each component should be identified. In the N4000 I do not suspect memory or systembus to be the problem. Might be the scsibus or the DLT itself.
The DLT has a hardware speed of 6 Mb/s, if it is not reached, the DLT will have the spin back. This may damage the drive after while, the drive must be kept streaming.
HTH Donald