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High-End NAS or Custom rack build?

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  • NAS / RAID
  • Storage
Last response: in Storage
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February 19, 2013 9:55:38 PM

Hello,

I support an interior design / art decoration company who's main business deals in high resolution images and prints.

There are 6 i7 ivybridge quad core macs pulling images from a 16bay NAS running 3tb 10000rpm drives in a raid 6 array. The switch is a managed HP ProCurve 1810G-24.

The issue we are running into: Each image that is pulled across the network can be anywhere from 1-4 gb. Multiply that by up to 6 systems pulling that data, we hit a bottleneck. Suprisingly however, it seems to be on the NAS and not at the switch. The nas has 4 gig ports, but cannot seem to push out over 90 or so Megabytes/sec total before choking on something we cannot seem to determine.

Multiple calls to Qnapp have seemed to dead end, it seems this is the best this quad core NAS can do.

What we need:

Large Storage capactiy; we're a 30gigs now, probably 100+ in 5 years.

High bandwidth: I'd like to see a 120megs/sec down to each system.

Centralized: needs to be a single browseable target folder structure.

I get that this is going to be expensive. I've had quotes anywhere from 40-140 grand. I just want to go into the decision informed about performance and scaleability of the systems out there. Anyone who knows a lot about this care to point/shove me in the right direction? :-)

More about : high end nas custom rack build

a c 78 G Storage
February 21, 2013 2:54:24 PM

Holly smoke ! that much!??

Want to hire me? LOL... Look at this USS. It's 100% satisfaction guaranteed. You can try it, ft it does not work get you money back :-)

RM16_USS - Scale-able iSCSI/NAS 3U

The problem you facing are RANDOM read/write in the NAS, definitely high bandwidth hardware raid will solve the problem.

Lots of companies mention transfer rate @ sequential where the real life applications data access in random read/write
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February 28, 2013 3:53:48 PM

Thanks for the response! The Qnap we are using now is all hardware raid 5, and it almost identical to the rm16 you sent over. We can add a 10GBE fiber card to it, but i have a feeling if it's not maxing 1gigabit line now, it won't go over that with a 10GBE card.

Right now we're looking at a 10GBE Fiber Card to a 10GBE Managed switch and a Nexenta custom built 4u rack server. The software interface is much more telling for monitoring purposes, and that is what is killing us right now with qnap... we can't tell what the fluff is going on...
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a c 78 G Storage
March 1, 2013 5:30:53 PM

makio001 said:
Thanks for the response! The Qnap we are using now is all hardware raid 5, and it almost identical to the rm16 you sent over. We can add a 10GBE fiber card to it, but i have a feeling if it's not maxing 1gigabit line now, it won't go over that with a 10GBE card.

Right now we're looking at a 10GBE Fiber Card to a 10GBE Managed switch and a Nexenta custom built 4u rack server. The software interface is much more telling for monitoring purposes, and that is what is killing us right now with qnap... we can't tell what the fluff is going on...


Are you certain the QNAP is hardware RAID? I can not see ANY spec from the RAID engine's I/O Processor... It seems like they are using hardware assist. This maybe why they can not delivery high performance RANDOM write / read.

I had installed at least 3 RM16_USS to my clients.

Here are what I know it can delivery:

Seq:
10Gb to 10Gb via SMB 745MB/s
10Gb to 10Gb via NFS 795MB/s
10Gb to 10Gb via iSCSI 815MB/s

RANDOM @ 400MB+ across the board

BTW RM16 and QNAP is not the same.

Just look at the RAID level offered and raid parameters from each unit offers you can see the different.

Update - Just want to make sure we post fact in this forum
We both wrong

You said it's Hardware RAID, I said it's hardware assist
But it's a SOFWARE RAID

Now I would not consider this QNAP is a high end NAS/iSCSI

Here is the chat log with QNAP tech

******
Hello, Guest!

Your chat history:

05:11:56 Thank you for contacting us. An operator will be with you
shortly...
05:11:56 Guest: What is the I/O processor of RAID engien in
TS-1679U-RP ?
05:25:45 Guest: hello?
05:29:09 [Visitor joined chat again]
05:29:23 Guest: Hello?
06:17:26 [Visitor joined chat again]
06:17:47 Guest: Anyone there?
06:25:24 [Visitor joined chat again]
06:27:19 Guest: Hello
06:28:25 [Visitor joined chat again]
06:28:32 [Visitor joined chat again]
06:28:55 [Visitor joined chat again]
06:36:16 [Visitor joined chat again]
06:36:39 Guest: Why i have no one answer the line?
06:43:13 [Operator Eddy L. joined the chat]
06:43:40 Eddy L.: Sorry, we have short hand during lunch hour.
06:43:53 Guest: Hello Eddy
06:43:58 Guest: I see
06:44:03 Guest: No PB
06:44:17 Eddy L.: Our NAS is using software RAID
06:44:51 Guest: I need to know what is the IO processor for the RAID
engine on 16x bay rackmount
06:46:06 Guest: like mdadm feature in LINUX?
06:46:46 Eddy L.: I am not sure that, what I know is our NAS is
software RAID, not hardware.
06:47:00 Eddy L.: Let me go find that out for you, please wait.
06:47:30 Guest: I'm talking about TS-EC1679U-RP and TS-1679U-RP model
06:47:37 Guest: OK please
06:47:50 Eddy L.: Yes, all of our NAS are using Software RAID
06:48:11 Eddy L.: Not hardware RAID
06:48:39 Guest: OK thank you
06:48:58 Eddy L.: You are welcome. Is any other question that I can
help?
06:49:31 Guest: No - that's all - Thank you
06:49:41 Eddy L.: Have a good day.
06:53:08 [Operator Eddy L. left the chat]

---
Kind Regards,
QNAP Inc. USA Support Team
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