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тАО10-26-2004 09:47 PM
тАО10-26-2004 09:47 PM
The current two disk shelves have 3 large oracle databases and our exchange system sitting on them.
I just wanted to know if it is better to add all the new disks to the single existing disk group to spread the databases over more spindles or create a separate disk group for the new shelves and move two of the oracle databases on to it instead?
Solved! Go to Solution.
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тАО10-27-2004 11:01 AM
тАО10-27-2004 11:01 AM
SolutionI would have to say that if you need to give more storage to your existing servers and you want to "expand" their current rives, then you NEED to have the space in the same Disk group.
If you just want to allocate more Virtual disks, then a new disk group might be feasible if your experiencing trouble with the current configuration, but not necessary.
Steven
HP Master ASE, Storage, Servers, and Clustering
MCSE (NT 4.0, W2K, W2K3)
VCP (ESX2, Vi3, vSphere4, vSphere5, vSphere 6.x)
RHCE
NPP3 (Nutanix Platform Professional)
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тАО10-27-2004 05:17 PM
тАО10-27-2004 05:17 PM
Re: Adding EVA3000 Disk Groups
We have two shelves with 76GB/10Krpm in one diskgroup, the next shelf will probably be filled with 146GB or 300GB disks.
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тАО10-27-2004 08:42 PM
тАО10-27-2004 08:42 PM
Re: Adding EVA3000 Disk Groups
With regards to the third posting I assume you would need two disk groups otherwise how would the system level the data across different sized disks?
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тАО10-27-2004 11:36 PM
тАО10-27-2004 11:36 PM
Re: Adding EVA3000 Disk Groups
You can however, mix and match within 1 disk group, but keep in mind a few things...
1. The larger disks will hold more data then the smaller disks (duh, I know). What I mean is, if you write out a 1GB file to a Vdisk that had 4 disks (3 72's and 1 146 (I know, i know, impossible....but this is just an example) ) Each of the 72's would have 200MB each and the 146 would have 400MB.
2. Your protection level is calculated using the LARGEST size drive in the group. If you have 6 72GB and 2 146 in a disk group of 8 disks with double protection, you end up with 146*4 used space for your group protection (144GB raw)
3. I am sure there are other reasons too, but the previous 2 are very important to consider.
Steven
HP Master ASE, Storage, Servers, and Clustering
MCSE (NT 4.0, W2K, W2K3)
VCP (ESX2, Vi3, vSphere4, vSphere5, vSphere 6.x)
RHCE
NPP3 (Nutanix Platform Professional)
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тАО10-28-2004 06:07 AM
тАО10-28-2004 06:07 AM
Re: Adding EVA3000 Disk Groups
Here is the link to:
"HP StorageWorks Enterprise Virtual Array Configuration Best Practices (5982-9140EN, October 2004)"
http://h20000.www2.hp.com/bizsupport/CoreRedirect.jsp?targetPage=http%3A%2F%2Fh200007.www2.hp.com%2Fbc%2Fdocs%2Fsupport%2FSupportManual%2Flpg29448%2Flpg29448.pdf
Very, very interesting reading!
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тАО10-28-2004 06:30 AM
тАО10-28-2004 06:30 AM
Re: Adding EVA3000 Disk Groups
SC
HP Master ASE, Storage, Servers, and Clustering
MCSE (NT 4.0, W2K, W2K3)
VCP (ESX2, Vi3, vSphere4, vSphere5, vSphere 6.x)
RHCE
NPP3 (Nutanix Platform Professional)