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тАО03-01-2006 01:06 AM
тАО03-01-2006 01:06 AM
Number of logical disk in volume groupe( Performance issue )
Using an EVA storage in hpux and when creating a volume group VG01 with for example 100GB.
Is it better to create one LUN with 100 GB for that volume group or with two LUN 50 GB each one, or more???
What is the impact about the performance when using oracle.
Best regards
Omar
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тАО03-01-2006 01:26 AM
тАО03-01-2006 01:26 AM
Re: Number of logical disk in volume groupe( Performance issue )
I would think that if you had 1 vdisk from a single disk group vs. multiple vdisks from the same disk group, your performance would be the same since yuou are getting the same amount of i/o. If the vdisks were from separate disk groups, then I might expect to see an increase in performance.
This just personal opinion, I am hp-ux illiterate.
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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тАО03-01-2006 02:03 AM
тАО03-01-2006 02:03 AM
Re: Number of logical disk in volume groupe( Performance issue )
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тАО03-01-2006 03:31 AM
тАО03-01-2006 03:31 AM
Re: Number of logical disk in volume groupe( Performance issue )
All the performance tweaks are done inside the EVA.
However, if you have several EVAs -- say 4, It will ceretainly matter as say for Oracle/DB storage.. I will certainly distribute or stripe my volumes accross those 4 EVAs..
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тАО03-01-2006 04:28 AM
тАО03-01-2006 04:28 AM
Re: Number of logical disk in volume groupe( Performance issue )
Never stripe luns across multiple eva's as under severe conditions, an eva may shutdown or reboot,and this will completely destroy you volume. yes this stripping will be faster, but go with dr first unless you are mirroring eva's.
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тАО03-01-2006 08:13 AM
тАО03-01-2006 08:13 AM
Re: Number of logical disk in volume groupe( Performance issue )
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тАО03-01-2006 08:10 PM
тАО03-01-2006 08:10 PM
Re: Number of logical disk in volume groupe( Performance issue )
Hello,
First, many thanks for your contributions,
Note that we are using one EVA storage, with one default diskgoup using 13 disks 146 GB. And in hpux 11i we are using secure path software, so each Vdisk has one single path and the load balancing is done by secure path for a single disk.
best regards
Omar