Re: RHEL to CentOS

From: Niall Litchfield <>
Date: Mon, 25 May 2015 09:32:17 +0100
Message-ID: <>

Interesting you should say that. We had huge problems with ACFS in RHEL 6.3 on UCS, "support" didn't help because the issue lay with a particular driver version that wasn't supported by RH on 6.3. Like others I'm not convinced a move to CentOS is likely to save very much money, but I'm not hugely convinced by the support argument either - my experience for difficult issues is Oracle will try to pass to the os vendor , the os people will look to the hardware and so on. In theory engineered systems solve this (but then the cost argument definitely dies). On 25 May 2015 03:43, "Riyaj Shamsudeen" <> wrote:

> IIRC, ACFS kernel modules does not load properly in centOS kernel. We had
> to customize a bit.
> Unless you have a pretty good reason, I'd stay with supported
> distribution.
> On May 24, 2015 3:00 PM, "Hans Forbrich" <>
> wrote:
>> On 24/05/2015 10:15 AM, David Hicken wrote:
>> One of my client's SysAdmins wants to move their Oracle DB from
>> RHEL 5 to a version of CentOS (5?). I have never done his kind of thing. I
>> googled but couldn't find anything definitive.
>> At the same level (examples: RHEL 5u4, CentSO 5u4, Oracle Linux 5u4 :
>> RHEL 6u5, CentSO 6u5, Oracle Linux 6u5) the distros are clones of Red
>> Hat. This means that from an API perspective, they are generally
>> compatible. Oracle Linux adds a second kernel which, when used, can give
>> Oracle products an edge.
>> However, some software checks the kernel or some files in /etc to
>> determine whether you are running a legitimate environment. Many Oracle
>> installers do check and highlight the mis-match but can be convinced to
>> allow the install anyway.
>> Years ago, I switched from CentOS to Oracle Linux as it is built from the
>> same sources as CentOS and Red Hat Linux, but Oracle Linux is available
>> free (no paywall to download, and free of license cost by GPL), ... AND
>> Oracle has a public YUM repository at that
>> can be used for the same level of 'support' as CentOS provides for free.
>> You don't need to get a support contract for Oracle Linux, and it is legit
>> to get a contract for some machines and not for others - you are on your
>> honour to not provide 'paid support patches' on an unsupported machine. (A
>> supported machine also can be monitored by Cloud Control, and has things
>> like KSplice and DTrace available.)
>> /Hans

Received on Mon May 25 2015 - 10:32:17 CEST

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