vSphere and HP EVA 4400 storage performance
Hi all
Maybe someone can help me.
Today I have a virtual infrastructure composed of two servers blades (2 cpus) and EVA 4400 storage with an enclosure full (12x400GB - 10krpm). Servers and storage are connected by fibre channel (4 GB connection).
I was guided by the society that places the first architecture to store each VM in a single LUN in EVA. This means that my Active Directory VM with 30 GB of vdisk is stored in a 40 GB logic unit number. They said it was better for the performance of the virtual machine, because it will be "only" to the LUN. It's okay? Do I have to keep doing this or it is better to store as much VM as possible with a vdisk with max 256 GB (more small block)?
I'm asking this because I'm planning and infrastructure upgrade: add another Blade Server, upgrade the 64 GB memory on each host and add another enclouser EVA storage (+ 12x400GB - 10krprm).
Today, I have a considerable of I/O use because I run 5 noon productive SAP environments with Oracle database, a database of Oracle 11 g and several applications and infrastructure servers. With the upgrade, I might add, for storage, the following VM: swap (~ 600 mailboxes), SQL server, IIS, 2 x Oracle 11 g, print server, Nagios,...
Please let me know your thoughts about the size of the LUNS to the virtual machines and the impacts on performance.
Best regards
Christian
> I was guided by the society that places the first architecture to store each VM in a single LUN in EVA. This means that my Active Directory VM with 30 GB of vdisk is stored in a 40 GB logic unit number. They said it was better for the performance of the virtual machine, because it will be "only" to the LUN.
Hmmm... Another 'know everything' without actual knowledge consultants.
If your multiple LUNS share the same physical disks - it absolutely doesn't matter in terms of performance if you VMs are placed on LUNS dedicated or shared. But you lose the flexibility with dedicated LUN.
It's okay? Do I have to keep doing this or it is better to store as much VM as possible with a vdisk with max 256 GB (more small block)?
Shared LUNS and several virtual machines on it will work absolutely perfect and you will be able to manage the space much more easily, especially with thin disks.
> Today I of I/O use because I run 5 noon productive SAP environments with Oracle database, a database of Oracle 11 g and several applications and infrastructure servers. With the upgrade, I might add, for storage, the following VM: swap (~ 600 mailboxes), SQL server, IIS, 2 x Oracle 11 g, print server, Nagios,...
In this case think of separate VMs with load I/O high and low load and place them on separate disk groups, so they definitely do not affect each other performance.
---
MCSA, MCTS, VCP, VMware vExpert 2009
Tags: VMware
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