Enum aerospike::Concurrency

pub enum Concurrency {
    Sequential,
    Parallel,
    MaxThreads(usize),
}

Specifies whether a command, that needs to be executed on multiple cluster nodes, should be executed sequentially, one node at a time, or in parallel on multiple nodes using the client's thread pool.

Variants

Sequential

Issue commands sequentially. This mode has a performance advantage for small to medium sized batch sizes because requests can be issued in the main transaction thread. This is the default.

Parallel

Issue all commands in parallel threads. This mode has a performance advantage for extremely large batch sizes because each node can process the request immediately. The downside is extra threads will need to be created (or takedn from a thread pool).

MaxThreads(usize)

Issue up to N commands in parallel threads. When a request completes, a new request will be issued until all threads are complete. This mode prevents too many parallel threads being created for large cluster implementations. The downside is extra threads will still need to be created (or taken from a thread pool).

E.g. if there are 16 nodes/namespace combinations requested and concurrency is set to MaxThreads(8), then batch requests will be made for 8 node/namespace combinations in parallel threads. When a request completes, a new request will be issued until all 16 requests are complete.