SSD Suggestions

[Alessandro 123]

Hi to all,
in our new server, i've asked for some Intel DC3610 480GB. Intel is very reliable on Enterprise SSDs (they are almost "industry-standard")

Samsung is the second choise, something like SM863 is very similiar to DC3610 from Intel, based on official specs.

Anyone using these models ? Are they reliable to be used in data-center contest ?

 

[spirit]

I'm using a lot of s3610 1,6TB for my ceph clusters , I have around 100 disks, and don't have any failure for now, very reliable.

I'm also using s3520 1,16tb for less write intensive cluster, they works fine too. (only 1 have died, some day after running, bad production, intel has change it with rma in some days)

 

[RobFantini]

we use 18 intel model s3520 . the price was far lower then s3610 at the time. read/write rates far exceed our needs. they work great.

 

[Alessandro 123]

But 3520 write endurance is far lower than 3610. About 220gb/day.

It's a lower model, that's way price is far lower.

 

[RobFantini]

But 3520 write endurance is far lower than 3610. About 220gb/day.

It's a lower model, that's way price is far lower.

that is interesting [in a bad way] .


So that I can try to calculate the life expectancy for these 3520's ::
Could you tell me where to find the data on Intel 3520 lack of endurance?

Also does anyone have a way using ceph data to get an estimate of current daily read and write totals for a ceph storage system?

 

[Alessandro 123]

You can find official specs on Intel website
Just a simple search on Google, first result. Isn't that hard.

 

[RobFantini]

I had done that , However I'll look further

At https://ark.intel.com/products/series/93103/Intel-SSD-DC-S3520-Series I could not find where there is a limit on number of writes. Mean Time Between Failures (MTBF) is 2 Million hours . So I assumed between that and the pve wiki https://pve.proxmox.com/wiki/Ceph_Server#Recommended_hardware that the 3520's are good to use.

I do not doubt what you have to say on 3520 write limits. I am just trying to find data to work with in order to know when to expect to replace these.
I assume they'll last years but assuming is not good.

in any case thank you for the information

 

[RobFantini]

I see it must be this:
Endurance Rating (Lifetime Writes):

480GB
3520: 945 terabytes written
3610: up to 10.7 Petabytes written

So that is a big difference.

 

[spirit]

S3520 : 1 dwpd
s3610 : 3 dwpd
s3710 : 10 dwpd

dwpd : 1 full write per day during 5 years.

 

[Alessandro 123]

I see it must be this:
Endurance Rating (Lifetime Writes):

480GB
3520: 945 terabytes written
3610: up to 10.7 Petabytes written

So that is a big difference.

Exactly.
3520 is not good for write workload.
A huge VMs could consume your SSDs in a very short time, that's why 3520 are much cheaper than 3610/3710

 

[Rhinox]

I can not imagine huge VM overwriting completely the whole disc once per day, every day during 5 years...

 

[Alessandro 123]

I can not imagine huge VM overwriting completely the whole disc once per day, every day during 5 years...

It depends on the SSD size. If you have a 400GB, there are some applications that writes tons of data. 400GB are not that much.

 

[Rhinox]

True, but usually for VM which writes 400GB/day you do not use disk just 400GB big...