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Thanks William ! I'm really interested in any contention issues between the
compute workload and the storage workload in converged nodes, and how folks
who are doing this are managing that.

On 3 September 2016 at 13:21, William Josefsson <william.josefson at gmail.com>
wrote:

> Hi matt, the hardware depends on your workload requirements,
> especially when we are talking latency. I do Dell PE R630s for
> Controllers, and R730 for Compute/Ceph. The latter got 8x400G Intel
> S3610+18xHitachi 1.8T SAS. Depending on the workload sensitivity if
> you have DBs and long distance between servers, you probably wanna
> look at fiber NICs and Switches, mellanox is popular but doesn't come
> for free. I do pure 6x10G Intel ixgbe in the 730s, all bonded LACP to
> Arista 7050X copper, total capacity per bond is 20Gbit (2x10G active
> active). I will test a pure flash array and see how it works too.
>
> If you have some very large flash array, you may wanna consider single
> socket. You can watch this video where they run DBs etc., on pure
> flash arrays and give some advice
> https://www.youtube.com/watch?v=OqlC7S3cUKs . thx will
>
> On Wed, Aug 31, 2016 at 8:01 PM, Matt Jarvis
> <matt.jarvis at datacentred.co.uk> wrote:
> > Time once again to dredge this topic up and see what the wider operators
> > community thinks this time :) There were a fair amount of summit
> submissions
> > for Barcelona talking about converged and hyper-converged
> infrastructure, it
> > seems to be the topic de jour from vendors at the minute despite feeling
> > like we've been round this before with Nebula, Piston Cloud etc.
> >
> > Like a lot of others we run Ceph, and we absolutely don't converge our
> > storage and compute nodes for a variety of performance and management
> > related reasons. In our experience, the hardware and tuning
> characteristics
> > of both types of nodes are pretty different, in any kind of recovery
> > scenarios Ceph eats memory, and it feels like creating a SPOF.
> >
> > Having said that, with pure SSD clusters becoming more common, some of
> those
> > issues may well be mitigated, so is anyone doing this in production now
> ? If
> > so, what does your hardware platform look like, and are there issues with
> > these kinds of architectures ?
> >
> > Matt
> >
> > DataCentred Limited registered in England and Wales no. 05611763
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> >
>

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