A Very Basic Oracle on VmWare System
Date: Wed, 28 Jun 2017 16:05:52 +0000
Message-ID: <C39B2385-FB6A-42F5-B75E-1855F20913D2_at_slac.stanford.edu>
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
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Received on Wed Jun 28 2017 - 18:05:52 CEST