Dynamic PCIe Bus Assignment The dynamic PCIe bus assignment feature enables you

Dynamic pcie bus assignment the dynamic pcie bus

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Dynamic PCIe Bus Assignment The dynamic PCIe bus assignment feature enables you to dynamically assign or remove a PCIe bus from a root domain. The dynamic PCIe bus assignment feature is enabled when your system runs the required firmware and software. If your system does not run the required firmware and software, the ldm add-io and ldm remove-io commands fail gracefully. When enabled, you can run the ldm add-io and ldm remove-io commands without stopping the root domain or putting the root domain in delayed reconfiguration. Dynamic PCIe bus assignment has these restrictions: PCIe bus containing rKVMS devices is restricted to the primary domain only. This is enforced by the logical domains manager. Direct I/O is not supported. All PCIe slots are directly connected to a PCIe root port. Related Information Oracle VM Server for SPARC documentation ( docs ) “Oracle VM Server for SPARC Overview” on page 27 “I/O Domain Resiliency” on page 28 I/O Domain Resiliency I/O domain resiliency improves the availability and performance of an I/O domain by enabling it to continue to run even when one of its associated root domains is interrupted. When a root domain is interrupted, the I/O domains that use its services continue to run by enabling its affected devices to fail over to the alternate I/O path. When the root domain returns to service, the affected devices in the resilient I/O domain are also returned to service and the failover capabilities are restored. 28 SPARC M7 Series Servers Administration Guide • January 2017
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Understanding Oracle Enterprise Manager Ops Center I/O domain resiliency is a logical domain configuration strategy that involves: Creating NPRDs to provide virtualized I/O services to the I/O domain. The NPRDs own at least one PCIe bus from at least one CMIOU. Creating virtualized I/O services from the NPRDs to the I/O domain. The I/O domain must have at least two I/O connections with one of the connections coming from one IOH on one CMIOU and the other connection coming from another IOH on a different CMIOU. Creating alternate paths to the I/O connections by using multipathing. I/O domain resiliency has these restrictions: Multipath I/O configurations are required for uninterrupted I/O services. Current support is limited to SR-IOV devices. For this feature, follow these guidelines: For fibre channel cards: Generally, add cards in pairs for redundancy. Spread the cards across IOHs. Enable MPxIO in the service domain. For NIC cards: Generally, add cards in pairs for redundancy. Use IEEE 802.3ad link aggregations in the service domain. For InfiniBand cards: Generally, add cards in pairs for redundancy. Avoid sharing the PCI bus with other cards, if possible.
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