The Textbook Things Gone Wrong in IT Thread
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@DustinB3403 said:
Lets all go out and build a 6TB SSD NAS just for price comparison.
You wouldn't build it as a NAS, that would be just as foolish as the external storage already there. It's doing it internal and saving all the money of the extra nodes AND the external storage that makes it SO cheap. I mean seriously cheap.
$2,464 for a RAIDed 6TB SSD setup with more than a half million IOPS. This will take nearly any enterprise RAID controller to its IOPS limits.
Are you really paying less than this for the external storage unit AND all of the extra servers?
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And that is if you leap directly to 6TB today (usable) instead of starting with 4TB and growing later. And that fits easily into a chassis like an R730 with tons of room for future growth.
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I can't possibly state how bad of an idea it is to have an external enclosure for this BUT I could, just for hypothetical cases, build a 6TB pure SSD NAS, rackmount, full enterprise server chassis.... $3,400. I literally just priced out the drives and server for it.
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I just priced a unit for about the same cost for just the chassis and the drives.
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@DustinB3403 said:
I just priced a unit for about the same cost for just the chassis and the drives.
Not too hard to do. SSDs are not that expensive anymore.
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What else is there besides chassis and drives?
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I didn't go any further, it wasn't worth the time.
Ha
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But just so it's out there: http://www.newegg.com/Product/Product.aspx?Item=N82E16817994147
and 6 of these http://www.newegg.com/Product/Product.aspx?Item=N82E16820147362
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@DustinB3403 said:
I didn't go any further, it wasn't worth the time.
Ha
There isn't any further. $3,400 is what it would cost.
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@DustinB3403 said:
But just so it's out there: http://www.newegg.com/Product/Product.aspx?Item=N82E16817994147
and 6 of these http://www.newegg.com/Product/Product.aspx?Item=N82E16820147362
You are short a drive, you'd need seven not six for 6TB. But those prices are $100 too high for that drive anyway.
That hardware isn't useful, that's a consumer backplane. I priced out an actually enterprise Dell server for the drives and seven of them with RAID overhead handled. Real enterprise grade storage, $3,400.
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I know it's a consumer grade unit, but the unit has 1 internal bay for "Backup" making it 7 (even though that would be stupid as all gitup).
Which is still not worth it to dig any further for a 6TB SSD NAS.
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And if we wanted a true 6TB of usable space in RAID10, we'd need 12 drives.
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@DustinB3403 said:
I know it's a consumer grade unit, but the unit has 1 internal bay for "Backup" making it 7 (even though that would be stupid as all gitup).
But it isn't a NAS chassis, it's only a drive holder. It's not a usable device on its own. It's not applicable at all. That isn't what a NAS is.
The number of bays is one issue, the number of drives though for pricing needs to be 7.
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Which the MSP is again recommending RAID5. . . . ... . .
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@DustinB3403 said:
And if we wanted a true 6TB of usable space in RAID10, we'd need 12 drives.
But you don't use RAID 10 on SSD, you use RAID 5. So seven. Trust me, I just went through all of this to figure out what an enterprise storage unit would look like for this use case. $3,400, after RAID. I've been quite clear that I accounted for all of that.
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Why wouldn't you use RAID10 with SSD's? I must've missed the article.
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@DustinB3403 said:
Which the MSP is again recommending RAID5. . . . ... . .
But on spinning rust, which alone should have them fired. RAID 5 on spinning drives in unthinkable. On SSD it would be sensible.
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@DustinB3403 said:
Why wouldn't you use RAID10 with SSD's? I must've missed the article.
Because none of the issues impacting RAID 5 on spinning rust exists on SSD. There are no UREs, rebuild times are practically instantaneous, drive failures were never a factor for serious consideration and the leap in IOPS is so enormous that the performance caveats to RAID 5 are lost in the ability to go from measuring per drive IOPS in the hundreds to the hundreds of thousands.
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Ah well that makes a lot more sense.
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And that is a huge part of the cost savings... you only need N+1 drives with SSD, not N*2. So tons more performance, many fewer drives. That lends itself to tons of cost savings.
And because cost effective 2TB SSDs are available now, you can use four of those in RAID 5 and move to a small 1U chassis for all of this!
