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What is a double sided vPC?
Yes. More on Double-Sided vPC Topologies A Cisco Nexus 5000 Series running in vPC mode that connects to a Cisco Nexus 7000 Series operating in vPC mode is called a double-sided vPC topology because PortChannels connect two vPC systems.
What will happens if vPC peer keepalive link fails?
vPC peer-link failure If peer-link fails, then all the member ports from vPC secondary node will be suspended. Here important to note, keep-alive is active in this scenario, which allowing nodes to exchange heartbeat. Solution: Make sure peer-link is UP and running.
How does a back to back VPC work?
A back-to-back vPC is a way of connecting two pairs of Nexus switches with vPC. Depending on the documentation, it is also known as Multi-Layer vPC or Double-Sided vPC. When a device connects to a pair of switches, it will do so with a regular port channel or LAG. It is unaware that there is a vPC at the other end.
Can a VSS backup application be accessed before recovery?
Data in the snapshot cannot be safely accessed prior to it going through the recovery phase to roll back in-flight transactions and place the database in a consistent state. It is possible for a VSS backup application to request autorecovery of the snapshots, as part of the snapshot creation process.
How does SQL writer support VSS based backup?
SQL Server (using the SQL writer) will support the following modes of VSS-based backup operations: The SQL writer is shipped as part of SQL Server and supports only SQL Server instances. The SQL writer will enumerate the SQL Server Express instances also. User instances launched by SQL Server Express will also be enumerated by the SQL writer.
What does Volume Shadow Copy Service ( VSS ) mean?
Applies to: SQL Server (all supported versions) SQL Server provides support for Volume Shadow Copy Service (VSS) by providing a writer (the SQL writer) so that a third-party backup application can use the VSS framework to back up database files.