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Virtualization with SSD

Mark16
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I'm planning to convert all the servers in the school to be in virtual server, we have

3 Database server (mysql) (Quiz server - upto 2000 users in a given time, Registration server - 15 users, Helpdesk server - 20 users)

1 FIle server (30 users mostly documents)

1 Backup server (files and mysql)

1 Test Server

 

Hardware Existing:

Dell poweredge r720 

Intel xeon e5-2640 v0 2.5ghz 6 core/12 threads (2 pcs)

64GB RAM

4 port Gigabit Network

 

For Update :

2TB SAS SSD (3pcs) RAID 5

2TB SAS HDD (3pcs) RAID 5

 

Question :

1) are Consumer SSD that is MLC build like Samsung 850 Evo will be enough?

2) Does my hardware needs upgrade?

3) Am i missing something?

 

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For SSDs, you should be fine as long as you get a more high end SSD like the 850 Pros. SLC cell SSDs are best, but not necessary.

 

As for hardware upgrades, I would upgrade the CPUs to e5-2670 v1 or v2s. The 2640s are okay, but you would see a big performance difference, especially on your quiz server.

My native language is C++

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On 5/4/2017 at 0:55 PM, leadeater said:

840 and 850 Pro's run like shit on LSI RAID cards and ESXi, really really badly they break and run at 30MB/s.

which server did you try this? HP or Dell?

 

 

On 5/4/2017 at 0:21 PM, Windspeed36 said:

Can confirm 850 Pro's work on a DL360 G9 with 2012R2 and hyper V

what is the speed of the SSD?

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8 minutes ago, Mark16 said:

which server did you try this? HP or Dell?

 

 

what is the speed of the SSD?

IBM x3500 M4 on an IBM M5110 RAID card and also on an LSI 9361-8i with fastpath and cachecade 2.0 additional licences. Server doesn't really matter much almost all use LSI OEM RAID cards other than HP.

 

I think the issue is the combination of LSI, Samsung and ESXi datastore as it works fine under Windows with the same hardware. There is a workaround of sorts which is when creating the datastore leave 20% unallocated and the performance stays much more stable and doesn't crash and burn if you don't push it too hard.

 

As for speed Samsung 850 Pros are the best consumer SATA class SSD on the market, everything else isn't as good in write wear or performance/latency consistency.

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12 minutes ago, TheCherryKing said:

Don't use consumer grade SSDs in a server that will be accessed by many people at a time. Consumer grade SSDs are not designed for heavy usage or 24/7 operation.

quiz server will be accessible for 3 straight hrs for a day everyday only.... the rest of the hrs no one will use the quiz server... 

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2 hours ago, Mark16 said:

i'm planning to use 2TB Samsung 850 Pro 3pcs and 3pcs of 2TB 10K SAS HDD for file server and etc...

Don't throw your money away on expensive 10K SAS disks for file services, you won't notice the difference. NL-SAS 7.2k will do the job fine unless there is specific special requirements that server will have, if it's just a general file server storing word docs etc then the minor performance increase of 10K disks isn't required.

 

Do you actually need that much SSD disk space? What is your expected growth rate? In a small setup like this you are much better off using 2 SSDs in a mirror rather than 3 in RAID 5, there is a significant performance difference in IOPs between the two configurations which for hosting VMs and databases is much more important than the higher sequential throughput of RAID 5.

 

P.S. We no longer buy SAS disks for our HPE server OS mirrors, HPE read intensive SSDs are exactly the same price and way faster and more reliable.

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I would suggest not using RAID5 on this sort of system. For hot data you are taking a huge performance penalty for the extra space. RAID10 is on a good hardware controller is the way to go.

 

Also like the others said, consumer SSD's will likely be a problem in the dell server with the LSI cards. If you are using VMWare I would stick to stuff from the HCI. If you are using Hyper-V, you get a little more room to move.

 

I have done a deployment using a Intel high end controller with BBU and Intel SSD's with no issues. 

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19 hours ago, NZLaurence said:

I would suggest not using RAID5 on this sort of system. For hot data you are taking a huge performance penalty for the extra space. RAID10 is on a good hardware controller is the way to go.

 

Also like the others said, consumer SSD's will likely be a problem in the dell server with the LSI cards. If you are using VMWare I would stick to stuff from the HCI. If you are using Hyper-V, you get a little more room to move.

 

I have done a deployment using a Intel high end controller with BBU and Intel SSD's with no issues. 

i have PERC H710 MINI... will i get good performance with ssd in this controller?

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