Xen 4.2 Limits: Difference between revisions
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#REDIRECT [[Xen_Release_Features]] |
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{{TODO|This is a work in progress. Feel free to add requests for more to the talk page or add additional information here}} |
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This document contains information about limits of Xen 4.2. |
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== CPUs & Memory == |
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* Xen can scale up to 4,095 host CPUs with 5Tb of RAM. |
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* Using Para Virtualization (PV), Xen supports a maximum of 512 VCPUs with 512Gb RAM per guest. |
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* Using Hardware Virtualization (HVM), Xen supports a maximum of 128 VCPUs with 512Gb RAM per guest. |
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== Other Limits == |
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* Maximum of 32K interrupts and 2k PCI segments: this limits the number of devices that can be |
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used in two ways. |
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** The number of devices many can be attached to the system must fit into 2k PCI segments, i.e. 2k * 256 [buses] * 32 [devices] * 8 [functions]) |
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** The number of hardware interrupts they may surface (one would expect at least one interrupt per device function, so this is the stricter of the two limitations). |
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Latest revision as of 14:19, 16 August 2012
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