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iMac Pros and 10G nets

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Oliver Peters
iMac Pros and 10G nets
on Apr 26, 2019 at 5:38:30 pm

There is probably only a fairly small group here that can answer this. But, I am looking for comparisons between performance on iMacs versus iMac Pros when connected to 10Gig shared storage networks. Both are connected via Thunderbolt adapters to 10Gig systems. The iMac Pros have a much greater tendency to disconnect volumes than the Retina iMacs. The lone trash can Mac Pro is also quite solid. Is anyone else seeing this? Obvious differences are Mac types, TB2 versus TB3, and adapter brands/models.

- Oliver

Oliver Peters - oliverpeters.com


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Morten Ranmar
Re: iMac Pros and 10G nets
on Apr 28, 2019 at 4:35:20 pm

We have a storage solution that has 4 x 1Gb network access, and 4 x 10Gb access. The 1Gb connections are link-aggregated and connected to a switch, which about 12 computers (iMacs, MBP's and PC's) have access to. The 10Gb connections are directly connected to 4 iMacPro computers, for editing and effects.

We experience approx. 4x increase in network performance through the 10Gb connections - and yes, they are very likely to disconnect (and almost always during over night renders).

- No Parking Production -

3 x Adobe CC, 2 x iMac Pro, 2 x MbP, 10 GB Ethernet File Server


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Merlin Vandenbossche
Re: iMac Pros and 10G nets
on Apr 28, 2019 at 5:00:11 pm

Hi Oliver,

No experience with iMacPro, but quite a lot with the regular iMac.

I run about five edit suites of Premiere, all iMac Retina 5K connecting through a 10Gbe network to a GRACK 12 storage. I use Sonnet Twin 10G adapters. Running on MacOS 10.13.6, using AFP protocol.

Two of them have almost never had issues, they are 2015 models (TB 2) connected to a Thunderbolt 2 Sonnet adapter. The other three are 2017 models (TB 3) connecting through a newer model Thunderbolt 3 Sonnet Twin 10G. On those three TB 3 I've experienced several issues over the last year. Often times no connection showing after a fresh boot, the Sonnet adapters not showing connection lights, etc... Trial and error, reconfiguring the cables would eventually solve the issue; but almost randomly it seemed. Have tried things like fixed IP's and re-installing drivers to no success.

I have sent the TB 3 adapters out for repair and hooked up the 2017 iMacs with some old Sonnet TB 2 adapters I still had lying around. So far smooth sailing for a month or two (despite having to connect these using a TB2-TB3 adapter now). I havent tried using the repaired TB 3 Sonnet yet (got them returned about a week ago). The speeds are consistent I believe all year round: about 500-600 MB/s on the blackmagic disk speed test.

One more thing: in the past I have had poor experiences using SMB protocol, also with random disconnects or inconsistent speed behaviour. This was on MacOS 10.12, where apparently there were bugs with SMB signing (you even had to trick the service using terminal). I haven't used SMB ever since: AFP seems stable, the GRACK supports it and the speeds are sufficient for our work.

Hope my case study teaches you something and best of luck!

Merlin


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Oliver Peters
Re: iMac Pros and 10G nets
on Apr 28, 2019 at 5:46:34 pm

Thanks for the replies. Generally some of these issues sound like the newer machines have the most connection problems. That's what I'm seeing at least at my end.

- Oliver

Oliver Peters - oliverpeters.com


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Brett Sherman
Re: iMac Pros and 10G nets
on May 1, 2019 at 12:31:19 pm

I wish Apple would sort out the SMB issues. They are abandoning AFP so it's not viable for much longer. And FCP X can't store libraries on AFP volumes. One would think given their move to SMB as the desired network storage protocol they'd be keen to knock out the bugs. But that appears to not be the case so far.


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