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by justinclift 2579 days ago
> enterprise dlink switches

"enterprise" DLink switches aren't really a thing yet, regardless of what their marketing team wants to brand them as. :(

Cisco, HPE, etc have "enterprise" switches. DLink might be in a decade.

> it is hard to saturate a 10gbe connection with a single NAS, unless it is packed with SSDs

No, it's just a matter of having enough spindles behind it.

As a rough guide, with a (say) average spinning rust HDD able to push out 100MB/s when reading, you'd only need 10 such drives to push out 1000MB/s (raw).

In the real world, you need extra spindles as some of the data being pushed out is just internal checksum/redundancy, and doesn't go over the network.

But for reading back large files in mostly sequential access, you'll hit 1GB/s from about 10 drives onwards pretty easily. More drives, more throughput.

1 comments

I would defer to people with more enterprise hardware experience than me for serious NAS set ups, but my experience with various generations of 12 disks synology nas is that you loose a lot of performance to disk vibrations / inefficiencies of the raid implementation / sync between drives / tcp, etc. So I don't think it scales linearly. With a synology DS3615 and 12 HGST Helium drives in RAID5, I barely get over 1GB/s locally while each drive individually is capable of over 200MB/s sustained speed.
Yeah, no idea with Synology. When I was originally looking at NAS solutions, they (and QNAP) just seemed expensive for not much product.

Went with FreeNAS instead, as I was already very familiar with building systems, it's based on FreeBSD (OSS), and it gives better tuning on the higher end.

Doesn't have as pretty a GUI though. ;)