Download: Topic Configuration Maximums VMware® vSphere 4.1 Virtual Machine Maximums

Topic Configuration Maximums VMware® vSphere 4.1 When you select and configure your virtual and physical equipment, you must stay at or below the maximums supported by vSphere 4.1. The limits presented in the following tables represent tested, recommended limits, and they are fully supported by VMware. “Virtual Machine Maximums” on page 1 “ESX Host Maximums” on page 2 “vCenter Server Maximums” on page 6 “vCenter Server Extensions” on page 6 The limits presented in this document can be affected by other factors, such as hardware dependencies. For more information about supported hardware, s...
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Topic Configuration Maximums VMware® vSphere 4.1

When you select and configure your virtual and physical equipment, you must stay at or below the maximums  supported by vSphere 4.1. The limits presented in the following tables represent tested, recommended limits,  and they are fully supported by VMware. “Virtual Machine Maximums” on page 1 “ESX Host Maximums” on page 2 “vCenter Server Maximums” on page 6 “vCenter Server Extensions” on page 6 The limits presented in this document can be affected by other factors, such as hardware dependencies. For  more information about supported hardware, see the appropriate ESX hardware compatibility guide. Consult  individual solution limits to ensure that you do not exceed supported configurations for your environment. The Configuration Maximums for vSphere 4.1 covers ESX, ESXi, and vCenter Server.

Virtual Machine Maximums

Table 1 contains configuration maximums related to virtual machines. Table 1. Virtual Machine Maximums Compute Virtual CPUs per virtual machine (Virtual SMP) 8 Memory RAM per virtual machine 255GB Virtual machine swap file size 255GB Storage Virtual Adapters and Devices Virtual SCSI adapters per virtual machine 41 Virtual SCSI targets per virtual SCSI adapter  152 Virtual SCSI targets per virtual machine 60 Disk size 2TB minus 512 bytes IDE controllers per virtual machine 13 IDE devices per virtual machine 4 Floppy controllers per virtual machine 1 Floppy devices per virtual machine 2 Networking Virtual Devices Virtual NICs per virtual machine 10 Virtual Peripheral Ports USB controllers per virtual machine 1 VMware, Inc. 1,

Table 1. Virtual Machine Maximums (Continued)

USB devices connected to a virtual machine 20 Parallel ports per virtual machine 3 Serial ports per virtual machine 4 Miscellaneous Concurrent remote console connections to a virtual machine 40 1. Any combination of supported SCSI virtual storage controllers. Four Paravirtual SCSI adapters  may be used only if the virtual machine boots from a device attached to an IDE controller, or from  the network. 2. Any combination of disk, CD‐ROM or VMDirectPath SCSI target. 3. Supports two channels (primary and secondary) each with a master and slave device.

ESX Host Maximums The following tables contain configuration maximums related to ESX hosts.

“Compute Maximums” on page 2 “Memory Maximums” on page 3 “Storage Maximums” on page 3 “Networking Maximums” on page 4 “Resource Pool and Cluster Maximums” on page 5

Compute Maximums Table 2 contains configuration maximums related to ESX host compute resources. Table 2. Compute Maximums

Host CPU maximums Logical CPUs per host up to 1601 Virtual machine maximums Virtual machines per host 320 Virtual CPUs per host 512 Virtual CPUs per core 252 Fault Tolerance maximums Virtual disks 16 Virtual CPUs per virtual machine 1 RAM per FT VM (GB) 64 Virtual machines per host 4 1. vSphere 4.1 supports up to 128, and vSphere 4.1 Update 1 supports up to 160. 2. The achievable number of vCPUs per core depends on the workload and  specifics of the hardware. For more information see the latest version of  Performance Best Practices for VMware vSphere. VMware, Inc. 2,

Memory Maximums Table 3 contains configuration maximums related to ESX host memory. Table 3. Memory Maximums

RAM per host 1TB  Maximum RAM allocated to service console 800MB  Minimum RAM allocated to service console 272MB Number of swap files 1 per virtual machine Swap file size Same as maximum virtual machine RAM

Storage Maximums Table 4 contains configuration maximums related to ESX host storage. Table 4. Storage Maximums

Item Maximum iSCSI Physical LUNs per server 256 Qlogic 1Gb iSCSI HBA initiator ports per server 4 Broadcom 1Gb iSCSI HBA initiator ports per server 4 Broadcom 10Gb iSCSI HBA initiator ports per server 4 NICs that can be associated or port bound with the software iSCSI stack  8 per server Number of total paths on a server 1024 Number of paths to a LUN (software iSCSI and hardware iSCSI) 8 Qlogic iSCSI: dynamic targets per adapter port 64 Qlogic iSCSI: static targets per adapter port 62 Broadcom 1Gb iSCSI HBA targets 64 Broadcom 10Gb iSCSI HBA targets 64 Software iSCSI targets 2561

NAS

NFS mounts per host 64 Fibre Channel LUNs per host 256 LUN size 2TB minus 512 bytes LUN ID 255 LUNs concurrently opened by all virtual machines 256 Number of paths to a LUN 32 Number of total paths on a server 1024 Number of HBAs of any type 8 HBA ports 16 Targets per HBA 256 VMware, Inc. 3,

Table 4. Storage Maximums (Continued) VMFS

Raw device mapping (RDM) size 2TB minus 512 bytes Volume size 64TB Volumes per host 256 Hosts per volume 64 VMFS-3 Block size  8MB File size (1MB block size) 256GB  File size (2MB block size) 512GB  File size (4MB block size) 1TB File size (8MB block size) 2TB minus 512 bytes Files per volume Approximately 30,720 1. The sum of static targets (manually assigned IP addresses) and dynamic targets (IP addresses  assigned to discovered targets) may not exceed this number.

Networking Maximums The following limits represent achievable maximum configuration limits for networking in environments 

where no other more restrictive limits apply (for example, vCenter Server limits, the limits imposed by  features such as HA or DRS, and other configurations that might impose restrictions must be considered when  deploying large scale systems).

For additional information about these maximums, see KB 1020808. Table 5 contains configuration maximums related to ESX host networking. Table 5. Networking Maximums

Physical NICs e1000 1GB Ethernet ports (Intel PCI‐x) 32 e1000e 1GB Ethernet ports (Intel PCI‐e) 24 igb 1GB Ethernet ports (Intel) 16 tg3 1GB Ethernet ports (Broadcom) 32 bnx2 1GB Ethernet ports (Broadcom) 161 forcedeth 1GB Ethernet ports (NVIDIA) 2 s2io 10GB Ethernet ports (Neterion) 4 nx_nic 10GB Ethernet ports (NetXen) 4 ixgbe Oplin 10GB Ethernet ports (Intel) 4 bnx2x 10GB Ethernet ports (Broadcom) 4 Infiniband ports (refer to VMware Community Support) N/A2 VMDirectPath limits VMDirectPath PCI/PCIe devices per host 8 VMDirectPath PCI/PCIe devices per virtual machine 43 VMware, Inc. 4,

Table 5. Networking Maximums (Continued)

vNetwork Standard and Distributed Switch Total virtual network switch ports per host (vDS and vSS ports) 4096 Maximum ACTIVE ports per host (vDS and VSS) 1016 Virtual network switch creation ports per standard switch 4088 Port groups per standard switch 512 Static or Dynamic Port groups per distributed switch 5000 Ephemeral Port groups per distributed switch 1016 Ports per distributed switch 20000 Distributed virtual network switch ports per vCenter 20000 Static or Dynamic Port groups per vCenter 5000 Ephemeral Port groups per vCenter 1016 Distributed switches per vCenter 32 Distributed switches per Host 16 Hosts per distributed switch 350 1. Recommended number of ports for bnx2 when in MSI‐X mode and jumbo configuration is 6.  This value takes precedence over recommendations in KB 1020808 for this configuration. 2. Mellanox Technologies InfiniBand HCA device drivers are available directly from Mellanox  Technologies. Refer to Mellanox for support status of InfiniBand HCAs with  ESX. http://www.mellanox.com 3. A virtual machine can support 6 devices, if 2 of them are Teradici devices.

Resource Pool and Cluster Maximums Table 6 contains configuration maximums related to ESX host resource pools and clusters.  Table 6. Cluster Maximums

Cluster (all clusters including HA and DRS) Hosts per cluster 32 Virtual machines per cluster 3000 Virtual machines per host 320 Maximum concurrent host HA failover  4 Failover as percentage of cluster 50% Resource pools per cluster 512 Resource Pool Resource pool tree depth 81 Resource pools per host  4096 Children per resource pool  1024 1. Additional 4 resource pools are used by system internals VMware, Inc. 5,

Using Maximum Values for More than One Configuration Option

If any one of the configuration options listed in the above tables is used at its maximum limit value, the ESX  host and vCenter Server with default configuration should be able to withstand the values. If more than one configuration options (such as, number of virtual machines, number of LUNs, number of vDS  ports etc.) are used at their maximum limit, some of the processes running on the host might run out of  memory. This might cause the host to keep disconnecting from the vCenter Server. In such a case, you need to  increase the memory pool for these host processes so that the host can withstand the workload you are  planning. You need to increase your memory pool size in correlation to the number of configuration options  you are using at the maximum value. vCenter Server Maximums Table 7 contains configuration maximums related to vCenter Server. Table 7. vCenter Server Maximums Item Maximum vCenter Server Scalability Hosts per vCenter Server 1000 Powered on virtual machines per vCenter Server 10000 Registered virtual machines per vCenter Server 15000 Linked vCenter Servers 10 Hosts in linked vCenter Servers 3000 Powered on virtual machine in linked vCenter Servers 30000 Registered virtual machine in linked vCenter Servers 50000 Concurrent vSphere Clients  100 Number of host per datacenter 400 Concurrent Operations Concurrent provisioning operations per host 4 Concurrent provisioning operations per datastore 4 Concurrent vMotion operations per host (1Gb/s network) 41 Concurrent vMotion operations per host (10Gb/s network) 81 Concurrent vMotion operations per VMFS3 datastore 128 Concurrent Storage vMotion operations per host 2 Concurrent Storage vMotion operations per datastore 8 1. Concurrent vMotion operation is currently supported only when source and destination  hosts are in the same cluster. vCenter Server Extensions The following tables contain configuration maximums related to vCenter Server extensions. “VMware vCenter Update Manager” on page 7 “VMware vCenter Orchestrator” on page 7 “VMware vCenter Converter” on page 8 “vSphere Storage Management Initiative ‐ Specification (SMI‐S)” on page 8 VMware, Inc. 6,

VMware vCenter Update Manager Table 8 contains configuration maximums for vCenter Update Manager. Table 8. vCenter Update Manager Maximums

vCenter Update Manager Scalability Host scans in a single vCenter Server 1000 Virtual machine scans in a single vCenter Server 10000 Cisco VDS update and deployment 70 Concurrent Operations Virtual machine remediation per ESX host 5 Powered‐on Windows virtual machine scans per ESX host 5 Powered‐off Windows virtual machine scans per ESX host 5 Powered‐on Linux virtual machine scans per ESX host 2 VMware Tools scan per ESX host 24 VMware Tools upgrade per ESX host 24 Virtual machine hardware scan per host 24 Virtual machine hardware upgrade per host 24 Virtual machine remediation per VUM server 48 Powered‐on Windows virtual machine scan per VUM server 17 Powered‐off Windows virtual machine scan per VUM server 10 Powered‐on Linux virtual machine scan VUM server 8 VMware Tools scan per VUM server 75 VMware Tools upgrade per VUM server 75 Virtual machine hardware scan per VUM server 75 Virtual machine hardware upgrade per VUM server 75 ESX host scan per VUM server 70 ESX host remediation per VUM server 8 ESX host upgrade per VUM server 44 ESX host upgrade per cluster 1

VMware vCenter Orchestrator Table 9 contains configuration maximums for vCenter Orchestrator. Table 9. vCenter Orchestrator Maximums

Item Maximum Connected vCenter Server systems 10 Connected ESX/ESXi instances 100 Connected virtual machines 150001 Concurrent running workflows 150 1. Virtual machines spread across 10 vCenter Servers VMware, Inc. 7,

VMware vCenter Converter Table 10 contains configuration maximums for vCenter Converter. Table 10. vCenter Converter Maximums

Concurrent virtual machine to virtual machine import or export tasks  8 Concurrent physical machine to virtual machine import or export tasks  20 vSphere Storage Management Initiative - Specification (SMI-S)

Table 11 contains configuration maximums for vSphere SMI‐S. Table 11. vSphere SMI-S Maximums

Item Maximum Number of vCenter Server systems connected 1 Number of ESX/ESXi hosts connected 1000 Number of ESX/ESXi hosts managed by vCenter Server 320 Number of virtual machines registered in vCenter Server 15000 If you have comments about this documentation, submit your feedback to: email is hidden VMware, Inc. 3401 Hillview Ave., Palo Alto, CA 94304 www.vmware.com Copyright © 2010, 2011 VMware, Inc. All rights reserved. This product is protected by U.S. and international copyright and intellectual property laws. VMware products are covered by one or more patents listed at http://www.vmware.com/go/patents. VMware is a registered trademark or trademark of VMware, Inc. in the United States and/or other jurisdictions. All other marks and names mentioned herein may be trademarks of their respective companies. Item: EN-000385-03]
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