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тАО10-03-2005 10:49 PM
тАО10-03-2005 10:49 PM
we've a two node cluster connected to a eva3000 storage array and putting the database backup to a vdisk on the eva3k. it is possible to present the vdisk with the backup to another node connected to this eva3k in read only mode which is not a member of this database cluster?
regards
Christian
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тАО10-03-2005 11:02 PM
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тАО10-03-2005 11:08 PM
тАО10-03-2005 11:08 PM
Re: Presentation of VDISK to another node
thanks for the answer.
The cluster machines running hp/ux 11.0 on pa-risc.
The machine to which I'll present the vg in read only mode running a hp/ux 11.23 on itanium.
I hope the different processor architecture is not a problem.
regards
Christian
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тАО10-03-2005 11:15 PM
тАО10-03-2005 11:15 PM
Re: Presentation of VDISK to another node
I never connected it to a different architecture, but my experencies says me that it might not be a problem.
Perhaps you can try with an simple lun to see what the impact will be
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тАО10-04-2005 01:09 AM
тАО10-04-2005 01:09 AM
Re: Presentation of VDISK to another node
Do you have the Business Copy EVA license? I think that is safer to take a snapshot and present the snapshot to the other host.
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тАО10-04-2005 01:15 AM
тАО10-04-2005 01:15 AM
Re: Presentation of VDISK to another node
using business-copy is a good idea too. I'll looking for a license and try it if I can.
Anyway ... because of that the cluster nodes contain our production databases I know that there's a risc but I can "recover" this vdisk by doing a new full backup if the files are corrupted.
Thanks for your answer.
regards
Christian
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тАО10-04-2005 04:44 AM
тАО10-04-2005 04:44 AM
Re: Presentation of VDISK to another node
And even if it were possible, then *I* would not do it.
The reason is that the read/write host is still able to make changes to the disk and it's meta data. The 'readonly' host does not expect such changes and can run into file system inconsistencies which might even cause a system crash!!
That's one of the reasons for doing a snapshot or a clone.
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тАО10-06-2005 03:13 AM
тАО10-06-2005 03:13 AM
Re: Presentation of VDISK to another node
thanks for your answer. These are very important reasons. I think I can't realize my idea this way.
What about umount-ing the vdisk from the db-cluster and mount it readonly to the other note? This is very easy because there are only the backup files on the disk.
regards
Christian
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тАО10-06-2005 03:24 AM
тАО10-06-2005 03:24 AM
Re: Presentation of VDISK to another node
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тАО10-06-2005 03:25 AM
тАО10-06-2005 03:25 AM