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Number of VMs on ESXi with these specs

post #1 of 16
Thread Starter 
Hi

I am planning on building a ESXi server, as I am constantly installing new OS's on my two servers. How many VMs would I be able to install without having them be slow.

The servers wont be under massive loads, just file hosting, web hosting torrent hosting, and testing and learning scripts etc.


I have the following;

CPU: Q9650 @ 3.0Ghz
RAM: 16Gb DDR2 800Mhz
HDD: 120Gb SSD
2x1TB HDD
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q9650 ASRock P43DE XFX ATI HD4650 4x4GBPC2-6400 (16GB TOTAL) 
Hard DriveOptical DriveOSMonitor
120GB Vertex 2x1TB Seagate Samsung SH-S223C Windows 7 Ultimate 64 bit 2x Samsung 2433BW 
KeyboardPowerCaseMouse
Microsoft 7000 v2 wireless 650W Aria Tsunami Dream Microsoft 7000 
Mouse Pad
cheapy one 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q9650 ASRock P43DE XFX ATI HD4650 4x4GBPC2-6400 (16GB TOTAL) 
Hard DriveOptical DriveOSMonitor
120GB Vertex 2x1TB Seagate Samsung SH-S223C Windows 7 Ultimate 64 bit 2x Samsung 2433BW 
KeyboardPowerCaseMouse
Microsoft 7000 v2 wireless 650W Aria Tsunami Dream Microsoft 7000 
Mouse Pad
cheapy one 
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post #2 of 16
I'm sure someone will correct me but personally i think this is the waste of an SSD as they're really only good for fast boot up times and that's not really relevant in this instance (I'm assuming the VMs will be on the 1TB HDDs anyway). But again that'd just be me smile.gif

If I'm reading the specs of the CPU correctly at newegg that CPU is a Quad core with a total of 4 threads. So perhaps at most two VMs per core would be around 8 VMs with 2gigs of memory each not including the actual host RAM. I would say get everything set up with six VMs and see how the performance is.

I'm sure error10 will be here in a minute to contradict all this... wink.gif
 
VM Server
(17 items)
 
 
CPUGraphicsRAMHard Drive
Intel Ivy Bridge Core i7-3630QM nVidia GeForce GTX 680M 16GB DDR3 1600MHz Dual Channel Memory (2 SODIMMS) Hard Drive: Serial-ATA II 3GB/s 
Hard DriveOSMonitorPower
Hard Drive: Serial-ATA II 3GB/s Windows 10 Pro x64 17.3" FHD 16:9 (1920x1080) Battery: Smart Li-ion Battery (8-Cell) 
Audio
Sound Blaster Compatible 3D Audio 
CPUMotherboardGraphicsRAM
Intel Core i7 860 Biostar T5 XE Radeon HD 5870 Corsair 16GB  
Hard DriveHard DriveOptical DriveOS
Western Digital hard drive wd1001fals-00e8b0 Maxtor 300GB I don't need no stinking optical drive Microsoft Windows 7 Ultimate x64 
MonitorMonitorKeyboardPower
HP ZR24w 24'' Samsung SyncMaster 24" logitech wireless k360 Seventeam ST-850ZAF 850W ATX 
CaseMouseAudioAudio
Thermaltake V9 Black Edition Logitech G500 Programmable Gaming Mouse FiiO E7 USB DAC and Portable Headphone Amplifier Sennheiser HD555 Professional Headphones 
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VM Server
(17 items)
 
 
CPUGraphicsRAMHard Drive
Intel Ivy Bridge Core i7-3630QM nVidia GeForce GTX 680M 16GB DDR3 1600MHz Dual Channel Memory (2 SODIMMS) Hard Drive: Serial-ATA II 3GB/s 
Hard DriveOSMonitorPower
Hard Drive: Serial-ATA II 3GB/s Windows 10 Pro x64 17.3" FHD 16:9 (1920x1080) Battery: Smart Li-ion Battery (8-Cell) 
Audio
Sound Blaster Compatible 3D Audio 
CPUMotherboardGraphicsRAM
Intel Core i7 860 Biostar T5 XE Radeon HD 5870 Corsair 16GB  
Hard DriveHard DriveOptical DriveOS
Western Digital hard drive wd1001fals-00e8b0 Maxtor 300GB I don't need no stinking optical drive Microsoft Windows 7 Ultimate x64 
MonitorMonitorKeyboardPower
HP ZR24w 24'' Samsung SyncMaster 24" logitech wireless k360 Seventeam ST-850ZAF 850W ATX 
CaseMouseAudioAudio
Thermaltake V9 Black Edition Logitech G500 Programmable Gaming Mouse FiiO E7 USB DAC and Portable Headphone Amplifier Sennheiser HD555 Professional Headphones 
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post #3 of 16
First reply is pretty spot on. Depends a lot on the use of the vm's and how heavy they'll be used. 6-8 Vm's should be doable without any of them slowing down too much. and depending on the os's being virtualized and the ram being used, you could double that if some of them aren't going to be heavily used.
As for using the single HDD, If you've got the free space, I'd use the SSD. The heaviest hitting bottle neck on any batch of vm's I've ever set up was the HDD. After 3 or so vm's being heavily used, all of them start to slow down because of access times.
Synthkart
(13 items)
 
  
CPUMotherboardGraphicsRAM
1055T Asus Onboard x4200 2x2GB GeIL DDR 1333 (9-9-9) 
Hard DriveOptical DriveOSMonitor
Seagate 320GB Sata3.0 Liteon iHAS124 Win7 x64 Some old crt 
KeyboardPowerCaseMouse
digital Raidmax-450K Some cheap raidmax Labtec 
Mouse Pad
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Synthkart
(13 items)
 
  
CPUMotherboardGraphicsRAM
1055T Asus Onboard x4200 2x2GB GeIL DDR 1333 (9-9-9) 
Hard DriveOptical DriveOSMonitor
Seagate 320GB Sata3.0 Liteon iHAS124 Win7 x64 Some old crt 
KeyboardPowerCaseMouse
digital Raidmax-450K Some cheap raidmax Labtec 
Mouse Pad
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post #4 of 16
Depends on what you are running, but maximum 8 VM's sounds reasonable.
Edited by Darkknight512 - 5/17/11 at 5:37pm
X-Caliber
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core 2 Quad Q8300 @3.0 Ghz Gigabyte EP43 UD3L ATI Radeon HD3850 512MB 800/950 4x1 GB 800 mhz DDR2 (Dual Channel) 
Hard DriveOptical DriveOSMonitor
160 Hitachi HDD LG Super-Multi Drive with SecurDisc Windows 7 - Ultimate (x86) Samsung SyncMaster 2043SWX 20" 1600x900 
KeyboardPowerCaseMouse
Logitech G15 Gaming Keyboard rev. 2 460 watt Coolermaster Coolermaster Elite Razer Deathadder 
Mouse Pad
Steelseries QcK 
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X-Caliber
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core 2 Quad Q8300 @3.0 Ghz Gigabyte EP43 UD3L ATI Radeon HD3850 512MB 800/950 4x1 GB 800 mhz DDR2 (Dual Channel) 
Hard DriveOptical DriveOSMonitor
160 Hitachi HDD LG Super-Multi Drive with SecurDisc Windows 7 - Ultimate (x86) Samsung SyncMaster 2043SWX 20" 1600x900 
KeyboardPowerCaseMouse
Logitech G15 Gaming Keyboard rev. 2 460 watt Coolermaster Coolermaster Elite Razer Deathadder 
Mouse Pad
Steelseries QcK 
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post #5 of 16
It looks like he'll have the SSD + the two 1TB HDDs so I was guess he'd put the OS on the SSD. I haven't installed ESXi before, I don't know anything about it. But if the most disk activity will be hitting the TB hdds then, keeping mind how little I know, I would say the SSD is being some how under-utilized in this application. IMHO.
 
VM Server
(17 items)
 
 
CPUGraphicsRAMHard Drive
Intel Ivy Bridge Core i7-3630QM nVidia GeForce GTX 680M 16GB DDR3 1600MHz Dual Channel Memory (2 SODIMMS) Hard Drive: Serial-ATA II 3GB/s 
Hard DriveOSMonitorPower
Hard Drive: Serial-ATA II 3GB/s Windows 10 Pro x64 17.3" FHD 16:9 (1920x1080) Battery: Smart Li-ion Battery (8-Cell) 
Audio
Sound Blaster Compatible 3D Audio 
CPUMotherboardGraphicsRAM
Intel Core i7 860 Biostar T5 XE Radeon HD 5870 Corsair 16GB  
Hard DriveHard DriveOptical DriveOS
Western Digital hard drive wd1001fals-00e8b0 Maxtor 300GB I don't need no stinking optical drive Microsoft Windows 7 Ultimate x64 
MonitorMonitorKeyboardPower
HP ZR24w 24'' Samsung SyncMaster 24" logitech wireless k360 Seventeam ST-850ZAF 850W ATX 
CaseMouseAudioAudio
Thermaltake V9 Black Edition Logitech G500 Programmable Gaming Mouse FiiO E7 USB DAC and Portable Headphone Amplifier Sennheiser HD555 Professional Headphones 
  hide details  
Reply
 
VM Server
(17 items)
 
 
CPUGraphicsRAMHard Drive
Intel Ivy Bridge Core i7-3630QM nVidia GeForce GTX 680M 16GB DDR3 1600MHz Dual Channel Memory (2 SODIMMS) Hard Drive: Serial-ATA II 3GB/s 
Hard DriveOSMonitorPower
Hard Drive: Serial-ATA II 3GB/s Windows 10 Pro x64 17.3" FHD 16:9 (1920x1080) Battery: Smart Li-ion Battery (8-Cell) 
Audio
Sound Blaster Compatible 3D Audio 
CPUMotherboardGraphicsRAM
Intel Core i7 860 Biostar T5 XE Radeon HD 5870 Corsair 16GB  
Hard DriveHard DriveOptical DriveOS
Western Digital hard drive wd1001fals-00e8b0 Maxtor 300GB I don't need no stinking optical drive Microsoft Windows 7 Ultimate x64 
MonitorMonitorKeyboardPower
HP ZR24w 24'' Samsung SyncMaster 24" logitech wireless k360 Seventeam ST-850ZAF 850W ATX 
CaseMouseAudioAudio
Thermaltake V9 Black Edition Logitech G500 Programmable Gaming Mouse FiiO E7 USB DAC and Portable Headphone Amplifier Sennheiser HD555 Professional Headphones 
  hide details  
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post #6 of 16
Quote:
Originally Posted by subassy;13543235 
I'm sure someone will correct me but personally i think this is the waste of an SSD as they're really only good for fast boot up times and that's not really relevant in this instance (I'm assuming the VMs will be on the 1TB HDDs anyway). But again that'd just be me smile.gif

If I'm reading the specs of the CPU correctly at newegg that CPU is a Quad core with a total of 4 threads. So perhaps at most two VMs per core would be around 8 VMs with 2gigs of memory each not including the actual host RAM. I would say get everything set up with six VMs and see how the performance is.

I'm sure error10 will be here in a minute to contradict all this... wink.gif
Quote:
Originally Posted by kenolak;13543315 
First reply is pretty spot on. Depends a lot on the use of the vm's and how heavy they'll be used. 6-8 Vm's should be doable without any of them slowing down too much. and depending on the os's being virtualized and the ram being used, you could double that if some of them aren't going to be heavily used.
As for using the single HDD, If you've got the free space, I'd use the SSD. The heaviest hitting bottle neck on any batch of vm's I've ever set up was the HDD. After 3 or so vm's being heavily used, all of them start to slow down because of access times.
Quote:
Originally Posted by Darkknight512;13543334 
Depends on what you are running, but maximum 8 VM's sounds reasonable.

It depends on how you allocate resources to the VMs, but with VMWare ESXi's Memory management abilities, you can easily run 12+ VMs on each of those servers, depending on memory load of your VMs.

Since you're not running a killer disk subsystem, except for the SSD, I doubt you're running anything memory-intensive.

Just for comparison - here's my current "production" load:

2DW6xaQ

More than 8 VMs already, and only 10GB usage. That includes VMs that are allocated 4GB+ of RAM...


Just for comparison. This is a Q6600 + 8GB of RAM running Hyper-V - with the same setup 128GB SSD + 2x1TB in RAID-1. Remember that Hyper-V is less efficient with memory management:

j6lbYZm

Notice how CPU usage remains near-zero? This is usually the case. RAM and network resources will be the first to be depleted... tongue.gif
Edited by ComGuards - 5/17/11 at 6:54pm
ESXi Host 1
(15 items)
 
  
CPUMotherboardGraphicsRAM
(2x) Intel Xeon E5520 Dell OnBoard Matrox G200 24GB DDR3 12x2GB UDIMMS (18 slots total) 
Hard DriveHard DriveHard DriveHard Drive
PERC6-RAID50 Intel 730 480GB Intel 320 300GB Synology DS414 iSCSI SAN 
OSMonitorKeyboardPower
VMWare vSphere5 Enterprise Plus Dell iDRAC6 Remote Management [KVM-Over-IP] Dell iDRAC6 KVM Dell Hot-Swap Redundant 1100W 
CaseMouse
Dell PowerEdge T710 Stock Dell iDRAC6 KVM 
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ESXi Host 1
(15 items)
 
  
CPUMotherboardGraphicsRAM
(2x) Intel Xeon E5520 Dell OnBoard Matrox G200 24GB DDR3 12x2GB UDIMMS (18 slots total) 
Hard DriveHard DriveHard DriveHard Drive
PERC6-RAID50 Intel 730 480GB Intel 320 300GB Synology DS414 iSCSI SAN 
OSMonitorKeyboardPower
VMWare vSphere5 Enterprise Plus Dell iDRAC6 Remote Management [KVM-Over-IP] Dell iDRAC6 KVM Dell Hot-Swap Redundant 1100W 
CaseMouse
Dell PowerEdge T710 Stock Dell iDRAC6 KVM 
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post #7 of 16
Yer images are fail
 
VM Server
(17 items)
 
 
CPUGraphicsRAMHard Drive
Intel Ivy Bridge Core i7-3630QM nVidia GeForce GTX 680M 16GB DDR3 1600MHz Dual Channel Memory (2 SODIMMS) Hard Drive: Serial-ATA II 3GB/s 
Hard DriveOSMonitorPower
Hard Drive: Serial-ATA II 3GB/s Windows 10 Pro x64 17.3" FHD 16:9 (1920x1080) Battery: Smart Li-ion Battery (8-Cell) 
Audio
Sound Blaster Compatible 3D Audio 
CPUMotherboardGraphicsRAM
Intel Core i7 860 Biostar T5 XE Radeon HD 5870 Corsair 16GB  
Hard DriveHard DriveOptical DriveOS
Western Digital hard drive wd1001fals-00e8b0 Maxtor 300GB I don't need no stinking optical drive Microsoft Windows 7 Ultimate x64 
MonitorMonitorKeyboardPower
HP ZR24w 24'' Samsung SyncMaster 24" logitech wireless k360 Seventeam ST-850ZAF 850W ATX 
CaseMouseAudioAudio
Thermaltake V9 Black Edition Logitech G500 Programmable Gaming Mouse FiiO E7 USB DAC and Portable Headphone Amplifier Sennheiser HD555 Professional Headphones 
  hide details  
Reply
 
VM Server
(17 items)
 
 
CPUGraphicsRAMHard Drive
Intel Ivy Bridge Core i7-3630QM nVidia GeForce GTX 680M 16GB DDR3 1600MHz Dual Channel Memory (2 SODIMMS) Hard Drive: Serial-ATA II 3GB/s 
Hard DriveOSMonitorPower
Hard Drive: Serial-ATA II 3GB/s Windows 10 Pro x64 17.3" FHD 16:9 (1920x1080) Battery: Smart Li-ion Battery (8-Cell) 
Audio
Sound Blaster Compatible 3D Audio 
CPUMotherboardGraphicsRAM
Intel Core i7 860 Biostar T5 XE Radeon HD 5870 Corsair 16GB  
Hard DriveHard DriveOptical DriveOS
Western Digital hard drive wd1001fals-00e8b0 Maxtor 300GB I don't need no stinking optical drive Microsoft Windows 7 Ultimate x64 
MonitorMonitorKeyboardPower
HP ZR24w 24'' Samsung SyncMaster 24" logitech wireless k360 Seventeam ST-850ZAF 850W ATX 
CaseMouseAudioAudio
Thermaltake V9 Black Edition Logitech G500 Programmable Gaming Mouse FiiO E7 USB DAC and Portable Headphone Amplifier Sennheiser HD555 Professional Headphones 
  hide details  
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post #8 of 16
Quote:
Originally Posted by subassy;13544349 
Yer images are fail

Can't load? Or something technically wrong with them?
ESXi Host 1
(15 items)
 
  
CPUMotherboardGraphicsRAM
(2x) Intel Xeon E5520 Dell OnBoard Matrox G200 24GB DDR3 12x2GB UDIMMS (18 slots total) 
Hard DriveHard DriveHard DriveHard Drive
PERC6-RAID50 Intel 730 480GB Intel 320 300GB Synology DS414 iSCSI SAN 
OSMonitorKeyboardPower
VMWare vSphere5 Enterprise Plus Dell iDRAC6 Remote Management [KVM-Over-IP] Dell iDRAC6 KVM Dell Hot-Swap Redundant 1100W 
CaseMouse
Dell PowerEdge T710 Stock Dell iDRAC6 KVM 
  hide details  
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ESXi Host 1
(15 items)
 
  
CPUMotherboardGraphicsRAM
(2x) Intel Xeon E5520 Dell OnBoard Matrox G200 24GB DDR3 12x2GB UDIMMS (18 slots total) 
Hard DriveHard DriveHard DriveHard Drive
PERC6-RAID50 Intel 730 480GB Intel 320 300GB Synology DS414 iSCSI SAN 
OSMonitorKeyboardPower
VMWare vSphere5 Enterprise Plus Dell iDRAC6 Remote Management [KVM-Over-IP] Dell iDRAC6 KVM Dell Hot-Swap Redundant 1100W 
CaseMouse
Dell PowerEdge T710 Stock Dell iDRAC6 KVM 
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post #9 of 16
An SSD for ESXi is a bit overkill since you could just install it to a flashdrive and be just as happy (while using the mechanical drives for the VMs obviously).

Take that SSD and throw it in your main rig tongue.gif

Edit:
As for your main question, you'll run out of RAM, disk space, or network throughput long before they'll start to "run slow", unless you start compiling tons of software or running LinX on all of them tongue.gif
Edited by tehmaggot - 5/17/11 at 7:17pm
magg0rt
(19 items)
 
  
CPUMotherboardGraphicsGraphics
i7 4930k @ 4.6Ghz MSI X79A-GD45 Plus PNY GTX 780 XLR8 Enthusiast Edition PNY GTX 780 XLR8 Enthusiast Edition 
RAMHard DriveHard DriveHard Drive
32GB Samsung 30nm RAM (8x4GB) 240GB Seagate SSD (Windows 8.1) 120GB Samsung 840 Pro (Fedora Linux) 120GB PNY XLR8 SSD (Steam) 
Optical DriveCoolingOSMonitor
HP DVD Writer 1070r Corsair H100i Windows 8.1 Pro x64 Planar SA2311W (120HZ) 
MonitorKeyboardPowerCase
ASUS VG248QE (144HZ) CM Storm QuickFire Pro Antec TruePower New 750w Corsair 200R 
MouseAudio
SteelSeries Xai ASUS Xonar DX 
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magg0rt
(19 items)
 
  
CPUMotherboardGraphicsGraphics
i7 4930k @ 4.6Ghz MSI X79A-GD45 Plus PNY GTX 780 XLR8 Enthusiast Edition PNY GTX 780 XLR8 Enthusiast Edition 
RAMHard DriveHard DriveHard Drive
32GB Samsung 30nm RAM (8x4GB) 240GB Seagate SSD (Windows 8.1) 120GB Samsung 840 Pro (Fedora Linux) 120GB PNY XLR8 SSD (Steam) 
Optical DriveCoolingOSMonitor
HP DVD Writer 1070r Corsair H100i Windows 8.1 Pro x64 Planar SA2311W (120HZ) 
MonitorKeyboardPowerCase
ASUS VG248QE (144HZ) CM Storm QuickFire Pro Antec TruePower New 750w Corsair 200R 
MouseAudio
SteelSeries Xai ASUS Xonar DX 
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post #10 of 16
Quote:
Can't load? Or something technically wrong with them?

They're just the broken image symbol. If I just enter http://db.tt/j6lbYZm into the URL bar is doesn't even come up. Actually it could be my work's proxy blocking the url shortener...

edit: yep, that's what it was. This is the first time i have run into the proxy block a specific sort of URL like this. Images are good, ignore me.
Edited by subassy - 5/17/11 at 7:18pm
 
VM Server
(17 items)
 
 
CPUGraphicsRAMHard Drive
Intel Ivy Bridge Core i7-3630QM nVidia GeForce GTX 680M 16GB DDR3 1600MHz Dual Channel Memory (2 SODIMMS) Hard Drive: Serial-ATA II 3GB/s 
Hard DriveOSMonitorPower
Hard Drive: Serial-ATA II 3GB/s Windows 10 Pro x64 17.3" FHD 16:9 (1920x1080) Battery: Smart Li-ion Battery (8-Cell) 
Audio
Sound Blaster Compatible 3D Audio 
CPUMotherboardGraphicsRAM
Intel Core i7 860 Biostar T5 XE Radeon HD 5870 Corsair 16GB  
Hard DriveHard DriveOptical DriveOS
Western Digital hard drive wd1001fals-00e8b0 Maxtor 300GB I don't need no stinking optical drive Microsoft Windows 7 Ultimate x64 
MonitorMonitorKeyboardPower
HP ZR24w 24'' Samsung SyncMaster 24" logitech wireless k360 Seventeam ST-850ZAF 850W ATX 
CaseMouseAudioAudio
Thermaltake V9 Black Edition Logitech G500 Programmable Gaming Mouse FiiO E7 USB DAC and Portable Headphone Amplifier Sennheiser HD555 Professional Headphones 
  hide details  
Reply
 
VM Server
(17 items)
 
 
CPUGraphicsRAMHard Drive
Intel Ivy Bridge Core i7-3630QM nVidia GeForce GTX 680M 16GB DDR3 1600MHz Dual Channel Memory (2 SODIMMS) Hard Drive: Serial-ATA II 3GB/s 
Hard DriveOSMonitorPower
Hard Drive: Serial-ATA II 3GB/s Windows 10 Pro x64 17.3" FHD 16:9 (1920x1080) Battery: Smart Li-ion Battery (8-Cell) 
Audio
Sound Blaster Compatible 3D Audio 
CPUMotherboardGraphicsRAM
Intel Core i7 860 Biostar T5 XE Radeon HD 5870 Corsair 16GB  
Hard DriveHard DriveOptical DriveOS
Western Digital hard drive wd1001fals-00e8b0 Maxtor 300GB I don't need no stinking optical drive Microsoft Windows 7 Ultimate x64 
MonitorMonitorKeyboardPower
HP ZR24w 24'' Samsung SyncMaster 24" logitech wireless k360 Seventeam ST-850ZAF 850W ATX 
CaseMouseAudioAudio
Thermaltake V9 Black Edition Logitech G500 Programmable Gaming Mouse FiiO E7 USB DAC and Portable Headphone Amplifier Sennheiser HD555 Professional Headphones 
  hide details  
Reply
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