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SSD Storage: 2018 in review

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Re: SSD Storage: 2018 in review

#111
post #31

Earlier quoted context omitted.

You think HDD can't fail without warning? OK, I get that SSD don't implement S.M.A.R.T but..

> I get that SSD don't implement S.M.A.R.T Despite the S.M.A.R.T data is less predictive on SSDs, they do have it, at least for SATA disks...

NVMe drives have it as well, at least the Samsung ones.

You can read it on Linux by running:

"nvme smart-log /dev/nvmeX"

Re: SSD Storage: 2018 in review

#112

Earlier quoted context omitted.

NVMe SSDs only significantly increase bandwidth, but not random throughput. Unless you have a 40gbit network you're not going to see the difference between one NVMe SSD or two if you're accessing them over the network.

I do everything baremetal, and my servers are a few extra (and quite decent) NICs for direct connection to eachother so that no even switches or routers bring their overhead

How much are you gaining by having multiple interfaces, with each one going to separate machine, instead of bonding them and using a switch?

Basically you dedicate 1/N to each server, instead of allocating it dynamically on demand.

Re: SSD Storage: 2018 in review

#113

Earlier quoted context omitted.

My NAS has 3x 1gbit Ethernet ports

10Gb ports are quite cheap as well especially if you're only going point to point (the switches are still a little pricy, but the ports for a NAS to VM host are easily under $100 now).

Even switches like Mikrotik CRS305-1G-4S+IN are getting into 100 EUR range, (if you are fine with running optic cables instead of metallic).

Re: SSD Storage: 2018 in review

#114
post #101

Earlier quoted context omitted.

It's not the same product: 970 PRO vs 970 EVO.

Another shop: https://www.alza.de/samsung-970-pro-1tb-d5319060.htm 276,47 EUR w/o VAT, 329 EUR with VAT. Currently, that's some 377 USD.

On Samsung's US website it's $350 (free s/h):

https://www.samsung.com/us/computing/memory-storage/solid-st...

Re: SSD Storage: 2018 in review

#115

Earlier quoted context omitted.

I had planned on doing this but even with gigabit wifi, and half gigabit transfer speeds for the SSD, NAS encryption algorithms seems to cap the transmission speeds to around 100 megabytes per second I have all the parts I just haven't formatted my SSDs to go into the NAS yet and I'm not sure if I will

100 megabytes per second sounds more like the limit of a gigabit connection than an encryption algorithm. Most NAS boxes of the last 5 years should be doing encryption offload on the CPU via things like AES-NI instructions which should be hitting ~500 MB/s per core.

Figured someone would say that

I can get 400 megaBYTES per second on my iphone from external sources

Inside my network I can get faster

Dont want the NAS to be a bottleneck for my wireless convenience

edit: still megabits

Re: SSD Storage: 2018 in review

#116

Earlier quoted context omitted.

I do everything baremetal, and my servers are a few extra (and quite decent) NICs for direct connection to eachother so that no even switches or routers bring their overhead

How much are you gaining by having multiple interfaces, with each one going to separate machine, instead of bonding them and using a switch? Basically you dedicate 1/N to each server, instead of allocating it dynamically on demand.

I gain over 10% extra performance for what I use my servers for (with 100% meaning one full new server)

Latency is critical for some tasks, with bandwidth being a distant second.

Re: SSD Storage: 2018 in review

#117

Earlier quoted context omitted.

99% of the time SSDs are a boolean: "Do you have a SSD? Yes/No" and performance between different SSDs is basically unnoticeable. Change my mind

> performance between different SSDs is basically unnoticeable Spinning rust drives will likely give you up to ~110 MB/sec. A SATA SSD will likely give you to up ~550 MB/sec, a 5x increase. An NVMe SSD will double the write and quadruple the read speed of a SATA SSD, in 1/3 the size. Yes, any SSD is likely good enough for your average user to feel like a computer is fast. If anything you do is even remotely heavy on…

Modern HDDs easily go beyond 110MB/s, but nonetheless stay well below 200MB/s afaik. It'll probably be somewhere in between. Otherwise your figures are fairly correct, if not on the conservative side for NVMe drives (a Samsung 970 Pro will sustain sequential speeds above 3GB/s read and 2GB/s write).

But focusing on sequential read speed misses the main improvement that SSDs give you over HDDs: random reads and writes ("seek speed"). Reading or writing lots of small files from an HDD will ruin your transfer speeds unless they're written sequentially, whereas a SATA SSD will do quite well and an NVMe SSD will do really well. This is the cause of the noticeable speedup when you upgrade to an SSD.

Re: SSD Storage: 2018 in review

#118

Earlier quoted context omitted.

10Gb ports are quite cheap as well especially if you're only going point to point (the switches are still a little pricy, but the ports for a NAS to VM host are easily under $100 now).

Even switches like Mikrotik CRS305-1G-4S+IN are getting into 100 EUR range, (if you are fine with running optic cables instead of metallic).

Optic fiber latency is questionable

Re: SSD Storage: 2018 in review

#119

Earlier quoted context omitted.

100 megabytes per second sounds more like the limit of a gigabit connection than an encryption algorithm. Most NAS boxes of the last 5 years should be doing encryption offload on the CPU via things like AES-NI instructions which should be hitting ~500 MB/s per core.

Figured someone would say that I can get 400 megaBYTES per second on my iphone from external sources Inside my network I can get faster Dont want the NAS to be a bottleneck for my wireless convenience edit: still megabits

iPhones "only" support WLAN with a theoretical max of 867 Megabit per second (802.11ac with 2x2 MIMO), so no, you don't get 400 Megabytes data transfer to it.

Re: SSD Storage: 2018 in review

#120

Earlier quoted context omitted.

10Gb ports are quite cheap as well especially if you're only going point to point (the switches are still a little pricy, but the ports for a NAS to VM host are easily under $100 now).

Even switches like Mikrotik CRS305-1G-4S+IN are getting into 100 EUR range, (if you are fine with running optic cables instead of metallic).

Thanks!

I am fine with fiber; it's cheap and for a few ports at home, I don't worry about the power (especially as compared to the servers it cross-connects).

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