Swapid

Swapid is a term used in several technical domains to denote an identifier associated with a swap operation or resource. There is no single, universally accepted definition, and the precise meaning of swapid depends on the context in which it is used.

In operating systems and virtualization, swap refers to a portion of storage used to extend a system’s virtual memory. Some tools, logs, or configuration schemes refer to the identifier of a swap device as a swapid, often implemented as a UUID or label. This helps distinguish among multiple swap partitions or swapfiles and to track their state across reboots or migrations.

In distributed computing and networking, a swap operation between nodes or caches may be assigned a swapid to trace activity, auditing, and debugging. In data synchronization or exchange protocols, a swapid can mark a particular swap payload so that receivers can verify integrity and ordering.

In finance and blockchain contexts, a token swap is sometimes given a swapid as a transaction reference within an application or protocol. Because swapid is not standardized, readers should consult the relevant documentation to determine what it denotes in a given system.

See also: UUID, swap space, transaction ID.