Just curious but why not just use a hypervisor with rbd support? Are there
VMware specific features you are reliant on?

On Fri, Dec 8, 2017 at 4:08 PM Brady Deetz <bde...@gmail.com> wrote:

> I'm testing using RBD as VMWare datastores. I'm currently testing with
> krbd+LVM on a tgt target hosted on a hypervisor.
>
> My Ceph cluster is HDD backed.
>
> In order to help with write latency, I added an SSD drive to my hypervisor
> and made it a writeback cache for the rbd via LVM. So far I've managed to
> smooth out my 4k write latency and have some pleasing results.
>
> Architecturally, my current plan is to deploy an iSCSI gateway on each
> hypervisor hosting that hypervisor's own datastore.
>
> Does anybody have any experience with this kind of configuration,
> especially with regard to LVM writeback caching combined with RBD?
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