Consumer Grade SSDs vs Enterprise Grade SSDs
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@scottalanmiller said:
@Dashrender said:
Sure, but if his environment is mostly static, doesn't this really change the way you look at it?
Depends. Are you trying to determine the relative value or are you trying to see if they are worrying about silly things? We already know the latter, so it must be the former.
If they are worrying about silly things, doesn't that make the former moot?
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@Dashrender said:
@MattSpeller said:
@Dashrender round up to 20GB/day
Samsung specs 850pro @ 300TB written
300,000GB / 20GB = 15,000 days / 365 = 41 years
What about 100GB/day?
300,000GB / 100GB = 8 years
Sure, if you are assuming you're writing to the same spot on the disk - the only time this matters. But if you are only adding 20 GB a day, and not changing the old stuff, that number goes MUCH higher.
If you constantly add anything each day, you will start overwriting.
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@Dashrender said:
If they are worrying about silly things, doesn't that make the former moot?
It's all about the emotional reaction of "is it worth it."
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@scottalanmiller said:
So here is the question... on the drives being considered what are the prices and the write durability numbers?
One drive is Samsung 850 EVO 1 TB 2.5-Inch SATA III Internal SSD (MZ-75E1T0B/AM) the other is Hewlett-Packard F3C96AT internal SSD
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@DustinB3403 said:
@scottalanmiller said:
So here is the question... on the drives being considered what are the prices and the write durability numbers?
One drive is Samsung 850 EVO 1 TB 2.5-Inch SATA III Internal SSD (MZ-75E1T0B/AM) the other is Hewlett-Packard F3C96AT internal SSD
I can't find anything anywhere with data on the F3C96AT. It appears to be an old product that has been off of the market for a while, from what I can tell.
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@scottalanmiller said:
@Dashrender said:
@MattSpeller said:
@Dashrender round up to 20GB/day
Samsung specs 850pro @ 300TB written
300,000GB / 20GB = 15,000 days / 365 = 41 years
What about 100GB/day?
300,000GB / 100GB = 8 years
Sure, if you are assuming you're writing to the same spot on the disk - the only time this matters. But if you are only adding 20 GB a day, and not changing the old stuff, that number goes MUCH higher.
If you constantly add anything each day, you will start overwriting.
Assuming you don't migrate to a larger array before you run out of space.
The OP has 6 TB of data today, but is starting with 11+ TB of total usable storage. We know his current growth rate is 13 GB for easy numbers. So that's 384 days worth of writes - wow in writing that out, that's less than 2 years worth of adds before he's out of space. hmmmm
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@Dashrender said:
The OP has 6 TB of data today, but is starting with 11+ TB of total usable storage. We know his current growth rate is 13 GB for easy numbers. So that's 384 days worth of writes - wow in writing that out, that's less than 2 years worth of adds before he's out of space. hmmmm
That's growth, writes may be no larger than that or thousands of times larger. All depends.
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300,000 / 13 = 23,076 days or 63 years.
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That's assuming that we are writing to only a single drive. If we have four drives in RAID 10, that gets cut in half. So 126 years of writes.
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I think we are saying that enterprise drives no longer make sense?
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@Dashrender said:
I think we are saying that enterprise drives no longer make sense?
They make a lot of sense but have to be approached from that perspective. They are not needed for normal wear and tear reasons. That is not their value. The value of enterprise drives is in the integrated support that they provide. Same as it has always been for spinning rust. Spinning rust enterprise drives don't last longer, they have good warranties. It is the warranty that justifies the extra cost.
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@Dashrender unless you write a zillion gigs a day, which I don't think he'll do
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@StrongBad if they don't last longer what good is a warranty? what's the value in that?
I thought enterprise SSD had insane written data life
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@StrongBad said:
@Dashrender said:
I think we are saying that enterprise drives no longer make sense?
They make a lot of sense but have to be approached from that perspective. They are not needed for normal wear and tear reasons. That is not their value. The value of enterprise drives is in the integrated support that they provide. Same as it has always been for spinning rust. Spinning rust enterprise drives don't last longer, they have good warranties. It is the warranty that justifies the extra cost.
The warranties - I don't think i can give you that one. Many consumer drives today do or can come with 5 year warranties. The special firmware is the question in my mind.
And, if the cost is really that much lower, replacing drives at 2:1 or even 3:1 could still be a cost savings, and that whole time value of money thing.
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@Dashrender said:
The warranties - I don't think i can give you that one. Many consumer drives today do or can come with 5 year warranties. The special firmware is the question in my mind.
The value of the warranty is the tech who runs to the site in four hours, with the part to swap and does the labor for you. Have you priced out the cost of doing a warranty replacement of an SSD in a datacenter? You have to buy the replacement drive with your own money, drive to the data center, replace the drive, and then do an RMA on the drive.
Enterprise warranties are the same value today that they have always been. When you need them, nothing compares.
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OK to TL;DR this whole rigamarole
Enterprise SSD - massive write lifetimes, measured usually in terabytes written per day
http://www.hgst.com/products/solid-state-drives/ultrastar-ssd800mhbConsumer SSD - usually 1/10 to 1/1000'th the write life time of Enterprise SSD's, measured in gigabytes written per day or terabytes written in it's lifetime.
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@StrongBad said:
@Dashrender said:
The warranties - I don't think i can give you that one. Many consumer drives today do or can come with 5 year warranties. The special firmware is the question in my mind.
The value of the warranty is the tech who runs to the site in four hours, with the part to swap and does the labor for you. Have you priced out the cost of doing a warranty replacement of an SSD in a datacenter? You have to buy the replacement drive with your own money, drive to the data center, replace the drive, and then do an RMA on the drive.
Enterprise warranties are the same value today that they have always been. When you need them, nothing compares.
Interesting take - but we're not talking about a datacenter install here, we're talking about an onsite server. And for the cost of the enterprise, I could have a spare or two of the consumer sitting on the self (and still a ton of savings).
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@DustinB3403 If you're writing 20GB/day to the SSD array you are very very very comfortably within the capabilities of consumer SSD's and you would have little to gain by splashing out for Enterprise drives.
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Put like eight SSDs in RAID 5, have a good memory cache in front of them and you are looking at write lifetimes heading towards a millennium!
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@Dashrender said:
If he has 6 TB of used storage today, and we assume that will be mostly static, and we add 12 GB a day - again as static files
Just because the amount of data stays about the same does not mean it's static data, every time a user opens a file and saves it will re-write that whole file to the SSD.
