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Author Topic: NAS access speed question  (Read 842 times)

BernardLanguillier

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NAS access speed question
« on: February 29, 2020, 05:33:16 am »

Team,

I have just upgraded my network to 10 GbE.

According to the Black Magic disk speed test, I see 500+ MB/s between the Mac Pro and a Synology NAS.

Is that reasonable?

Cheers,
Bernard

degrub

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Re: NAS access speed question
« Reply #1 on: February 29, 2020, 08:29:24 am »

If it is sending sequential blocks from the disks, it might be possible, as it can keep the ethernet buffer full. 500 MB/s is roughly 4Mbit/sec plus a little for overheads. 
The slowest speeds should occur when writing random blocks to the disks e.g. lots of small files in random locations on the disks. Buffer size on both ends will affect the result.

If there is a version of NASPT directory test for read/write to disk over network for Mac, that would be a more real world test for general use. If what you are doing is linear editing of video, the results you got may be indicative.
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Joe Towner

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Re: NAS access speed question
« Reply #2 on: February 29, 2020, 11:23:13 am »

500MB/s is 4,000mbps, so quite a lot, but not full power.  Which model NAS are you using, does it have the base RAM or did you upgrade it, and how many of what disks in what storage configuration.

You may want to do Jumbo Frames on that interface - changing the MTU to 9000 from 1500.  Is the NAS directly connected to the Mac Pro or thru a switch?
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BernardLanguillier

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Re: NAS access speed question
« Reply #3 on: February 29, 2020, 05:44:32 pm »

Thanks!

The NAS is a Synology 1817+ with base RAM configured in Raid 6.

Both are connected to a Netgear XS712Tv2 with default config using cat6a (walls) and cat7 cables.

Cheers,
Bernard

degrub

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Re: NAS access speed question
« Reply #4 on: February 29, 2020, 09:31:28 pm »

Yeah, i slipped a k. Old age, i guess. ;D


If you cannot limit the 9k mtu to the two switch ports and the two devices, any other device on the network will have to support 9k frames as well, at least in my experience. It will put some lag in for the translation of frame size.

I think the buffer/ram size on the devices will make more difference if the synology can keep up with wire speed.

Joe, you have different ?
« Last Edit: February 29, 2020, 09:36:36 pm by degrub »
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Joe Towner

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Re: NAS access speed question
« Reply #5 on: February 29, 2020, 10:50:37 pm »

The NAS is a Synology 1817+ with base RAM configured in Raid 6.

How many disks at what capacity?  What rpm? Any SSD caching?

It beats the snot out of 1gbps stuff, and you're on the way to much faster with a few tweaks. The MTU change will help a lot.
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BernardLanguillier

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Re: NAS access speed question
« Reply #6 on: February 29, 2020, 11:03:01 pm »

How many disks at what capacity?  What rpm? Any SSD caching?

It beats the snot out of 1gbps stuff, and you're on the way to much faster with a few tweaks. The MTU change will help a lot.

8x10TB, no SSD caching. There is only one PCIe slot and I had to use it for the 10 GgE network card...

Thanks! I'll try the MTU setting.

Cheers,
Bernard

Joe Towner

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Re: NAS access speed question
« Reply #7 on: March 01, 2020, 01:22:04 am »

There is only one PCIe slot and I had to use it for the 10 GgE network card...

I know that pain... Let us know how the retest goes.
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BernardLanguillier

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Re: NAS access speed question
« Reply #8 on: March 03, 2020, 07:02:30 pm »

I tried changing to 9000 on the 10 GbE ports of the router, but have measured to change of performance.

Cheers,
Bernard

degrub

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Re: NAS access speed question
« Reply #9 on: March 04, 2020, 12:08:38 am »

Did you change it on the nas port and the mac port as well ?
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mdelrossi

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Re: NAS access speed question
« Reply #10 on: March 04, 2020, 09:22:30 am »

What is the RPM of the drives? What make?
I have a Qnap 672xt with 4 iron wolf 10tb 7200rpm drives and I get 500 write 800 read over 10gbe.
The processor in the NAS is an i3 base ram.

The rpm and cache of the drives make a difference as well as the processor in the NAS. It the sum of the parts.
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degrub

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Re: NAS access speed question
« Reply #11 on: March 04, 2020, 09:57:10 am »

And the cache. What is your cache size ?

Were those numbers from sequential write and read or random small file size ?

Is the connection over SMB protocol ? Which version ? Or other protocol ?

Thanks 😊
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Christopher

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Re: NAS access speed question
« Reply #12 on: March 04, 2020, 05:25:23 pm »

I have to check what my Synology does next time I’m there. My own FreeNAS Server does 950 read and write. I think the symbology was around 800

Other very dump question, where are u writing to / reading from? I just tempered the very first test I did was from an SATA SSD which maxed out at 450  ::)
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Christopher Hauser
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Cem

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Re: NAS access speed question
« Reply #13 on: March 09, 2020, 05:43:10 am »

Hi Bernard,

Do you have an SPF+ adapter in the Synology or a RJ45 one? I presume the latter since you are using Cat-6/7 cables.
What hard disks (brand/type) are used in the NAS?

I am considering setting up a 10 Gbe network myself, hence the questions. :)
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