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The SCSP SEND method applies to both named and unnamed objects. The SEND request allows explicit transmission of a newly written object from a source cluster to a remote one, such as for keeping two clusters immediately synchronized. The feed SEND method works with any feed type as of Swarm 11.2, so it can force synchronous processing of a specific object on one or more of those feeds.
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Which node to SEND to — Content Gateway determines the optimal target node for the request if using SEND through Content Gateway (under development for future release); select the node if going direct to Storage. All replicas must perform feed processing, but, on a new write, one replica gets to go first for begins replication and S3 backup processing. A SEND request has the best chance of arriving with the replication already in progress, which speeds completion if pointing SEND to the optimal node (which holds this first replica). Determine whether the request is an EC write and whether the request is a multipart completion to find the optimal SEND node. Identify an EC write by the “Manifest: ec” response header.
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