Chapter 2. Considerations for Using GNBD with Device-Mapper Multipath

Chapter 2. Considerations for Using GNBD with Device-Mapper Multipath

2.1. Linux Page Caching
2.2. Fencing GNBD Server Nodes

GNBD with device-mapper multipath allows you to configure multiple GNBD server nodes (nodes that export GNBDs to GFS nodes) to provide redundant paths to the storage devices. The GNBD server nodes, in turn, present multiple storage paths to GFS nodes via redundant GNBDs. When using GNBD with device-mapper multipath, if a GNBD server node becomes unavailable, another GNBD server node can provide GFS nodes with access to storage devices.

If you are using GNBD with device-mapper multipath, you need to take the following into consideration:


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