Auteur Sujet: Linux distro loading times.  (Lu 1348 fois)

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Linux distro loading times.
« le: 13 décembre 2013 à 00:13:41 »
Okay so I just recently got my new Kingston Solid State Drives, and they're currently loaded in a RAID0 layout (mostly for my gaming) and paired up with my 500Gb Western Digital HDD and 1TB Samsung HDD.

Now I've been running Linux on my Samsung disk for over 2 years, time to have some fun with SSDs :3

Does anyone want to see how fast their distro loads on these beasts? :p

Config:
CPU: Intel i5-2500k @ 4.7Ghz watercooled.
GPU: Sapphire R9 270X
Motherboard: ASUS Sabertooth P67
RAM: 4x2GB Crucial Ballistix 1333Mhz
SSD: 2x Kingston HyperX 3K (RAID0)

Hors ligne mimas

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Re : Linux distro loading times.
« Réponse #1 le: 13 décembre 2013 à 09:42:25 »
Hi

> they're currently loaded in a RAID0

What's the point? This RAID level is made to speed up devices, ig. two 5400 RPM Hard-drives make a supa-hard-drive at no cost in a RAID 0 array. You won't speed up SSDs a lot, it's memory (the major bottleneck for memory is the data bus). You have paid the MB/s at the higher price. Moreover, benchmarks show a higher latency with RAID 0 array.

This level is not fault-tolerant, you lose every data on the array if one of your drive is going crazy (yeah buggy SSD firmware!!).

When any government, or any church for that matter, undertakes to say to its subjects, "This you may not read, this you must not see, this you are forbidden to know," the end result is tyranny and oppression, no matter how holy the motives.

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Re : Linux distro loading times.
« Réponse #2 le: 13 décembre 2013 à 13:30:20 »
Hi Sedition, hi mimas,

If I understand well what mimas says, Seditio looses on one side what he gains on the other? And this would be with an added risk of data lost?
Good leaders being scarce, following yourself is allowed.

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Re : Linux distro loading times.
« Réponse #3 le: 13 décembre 2013 à 16:21:30 »
> Seditio looses on one side what he gains on the other?

Memory is fast (we count in nanoseconds). So it makes no difference for a human being because it is out of human perception range. Hard drives are mechanicals and slow; their mechanical delays are within or close to human perception range (> 10 ms, from POOFA study*)

*Pulled Out Of My Ass
« Modifié: 13 décembre 2013 à 16:26:35 par mimas »
When any government, or any church for that matter, undertakes to say to its subjects, "This you may not read, this you must not see, this you are forbidden to know," the end result is tyranny and oppression, no matter how holy the motives.

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Re : Linux distro loading times.
« Réponse #4 le: 13 décembre 2013 à 18:37:14 »
I'm currently toying with the RAID as it does boost read speed from 480MB/s to 970MB/s, so the effect here is clear, as for latency time, I see nothing.

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Re : Linux distro loading times.
« Réponse #5 le: 13 décembre 2013 à 20:07:45 »
Let's get numbers!

For an ISO of 780 MB:
- Fast hard drive, loading time = 780 / 150 = 5.2 s
- Single SSD, loading time = 780 / 480 = 1.62 s
- Dual SSD RAID 0, copying time = 780 / 970 = 0.8 s

Nice but nobody copies ISO files all day long. So let's do it for an average 2.5 MB files

- Fast hard drive, 2.5 / 150 = 0.016 s
- Single SSD, 2.5 / 480 = 0.005 s
- Dual SSD RAID 0, 2.5 / 970 = 0.002 s

Is there a difference between a file loading in 0.005 second and a file loading in 0.002 second? It could be a difference in a huge network but not in desktop computer, even if you're a serious gamer.

Let's do charts because everybody loves charts.

« Modifié: 13 décembre 2013 à 21:42:49 par mimas »
When any government, or any church for that matter, undertakes to say to its subjects, "This you may not read, this you must not see, this you are forbidden to know," the end result is tyranny and oppression, no matter how holy the motives.