Re: Ceph iSCSI is a prank?

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On 02/28/2018 10:06 AM, Max Cuttins wrote:


Il 28/02/2018 15:19, Jason Dillaman ha scritto:
On Wed, Feb 28, 2018 at 7:53 AM, Massimiliano Cuttini <max@xxxxxxxxxxxxx> wrote:
I was building ceph in order to use with iSCSI.
But I just see from the docs that need:

CentOS 7.5
(which is not available yet, it's still at 7.4)
https://wiki.centos.org/Download

Kernel 4.17
(which is not available yet, it is still at 4.15.7)
https://www.kernel.org/
The necessary kernel changes actually are included as part of 4.16-rc1
which is available now. We also offer a pre-built test kernel with the
necessary fixes here [1].
This is a release candidate and it's not ready for production.
Does anybody know when the kernel 4.16 will be ready for production?

Every user/customer has a different definition of "production" - most enterprise users will require their distribution vendor to have this prebuilt into a product with commercial support.

If you are looking at using brand new kernels in production for your definition of production without vendor support, you need to have the personal expertise and staffing required to validate production readiness and carry out support yourself.

As others have said, that is the joy of open source - you get to make that call on your own, but that does come at a price (spending money for vendor support or spending your time and expertise to do it on your own :))

Regards,

Ric




So I guess, there is no ufficial support and this is just a bad prank.

Ceph is ready to be used with S3 since many years.
But need the kernel of the next century to works with such an old technology
like iSCSI.
So sad.
Unfortunately, kernel vs userspace have very different development
timelines.We have no interest in maintaining out-of-tree patchsets to
the kernel.

This is true, but having something that just works in order to have minimum compatibility and start to dismiss old disk is something you should think about. You'll have ages in order to improve and get better performance. But you should allow Users to cut-off old solutions as soon as possible while waiting for a better implementation.

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