Re: A Very Basic Oracle on VmWare System

Vmotion is only possible on shared storage. But no, a single physical lun does not provide enough protection. Most people use a san for their storage in VMware, your configuration is unusual in that it is on local disks.

On Wed, Jun 28, 2017 at 2:38 PM, MacGregor, Ian A. <ian_at_slac.stanford.edu> wrote:

> Seth both. I don’t see how a single physical LUN provides enough
> protection. As far as moving of the databases is the even possible with
> this setup?
>
> IAN
>
> On Jun 28, 2017, at 11:57 AM, Seth Miller <sethmiller.sm_at_gmail.com> wrote:
>
> Ian,
>
> Can you clarify your concern? Is the problem that you can't migrate your
> databases without taking an outage, or that the LUN doesn't offer enough
> protection for your database files?
>
>
> Seth Miller
>
> On Wed, Jun 28, 2017 at 1:39 PM, Andrew Kerber <andrew.kerber_at_gmail.com>
> wrote:
>
>> Most people run their VM's over shared storage, which allows for vmotion
>> and storage vmotion. When I am setting up small stuff, not enterprise, but
>> want to make sure of the data I use ASM and ASM native data protection, ie
>> standard redundancy. On the OS side, we can use snapshots.
>>
>> On Wed, Jun 28, 2017 at 11:05 AM, MacGregor, Ian A. <
>> ian_at_slac.stanford.edu> wrote:
>>
>>> We run our VMs on local disk; i.e, no SAN or NAS. Let’s say physical
>>> machine a has 24 disks. The standard configuration to create a 22 disk
>>> RAID 10 physical LUN. Then carve the virtual file systems out of that.
>>> I don’t like this idea because, to doesn’t provide enough protection
>>> for the control and online redo log files.
>>> The reason for setting up one physical LUN is to allow for VM
>>> migration.
>>>
>>> I presently have several small databases running on several VMs. I
>>> insisted on at least two physical LUNs. The inability to migrate VMs
>>> means the possibility of additional outages should their hypervisors need
>>> to be shutdown, and the outage cannot be coordinated with other patching.
>>> So the only databases I have on VMs are ones which do not have to be up
>>> 24 X 365
>>>
>>> I’m not sure how VmWare has become so popular with this restriction.
>>> We are replacing our present physical machines which host the VMs. The
>>> main difference is the new servers are all SSD. This is highly
>>> attractive, but the VmWare administrator has indicated their will be no
>>> exceptions for Oracle
>>>
>>> If it is standard to care the VM file systems out of one physical LUNs
>>> what is being done to protect the control file and redo logs.
>>>
>>> Ian MacGregor
>>> SLAC National Accelerator Laboratory
>>> ian_at_slac.stanford.edu
>>
>>
>>
>>
>> --
>> Andrew W. Kerber
>>
>> 'If at first you dont succeed, dont take up skydiving.'
>>
>
>
>

-- 
Andrew W. Kerber

'If at first you dont succeed, dont take up skydiving.'

--
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