Content item block replication protocol for multi-premises hosting of digital content items

A method for a content item block replication protocol, the method performed by a computing system comprising one or more processors and memory, the method comprising:

• receiving, from a metadata server, an identification of content item blocks wherein a content item comprises the content item blocks;
• based, at least in part, on the received identification, storing a replication log entry in a replication log, the replication log entry comprising the identification of content item blocks and an identifier of an off-premises content item block server of a content management service;
• and
• based, at least in part, on processing the replication log entry, downloading at least one content item block, of the content item blocks of which the content item is composed, from the off-premises content item block server identified in the replication log entry.

A computing system comprising:

• one or more processors;
• one or more programs for a content item block replication protocol, the one or more programs configured for execution by the one or more processors, the one or more programs comprising instructions configured for:
• receiving, from a metadata server, an identification of content item blocks, wherein a content item comprises the content item blocks;
• based, at least in part, on the received identification, storing a replication log entry in a replication log, the replication log entry comprising the identification of content item blocks and an identifier of a content item block server;
• and
• based, at least in part, on processing the replication log entry, transmitting, to the content item block server identified in the replication log entry, an offer to send at least one content item block, of the content item blocks of which the content item is composed, to the content item block server identified in the replication log entry;
• receiving, from the content item block server, an acceptance of the offer to send the at least one content item block;
• and
• based, at least in part, on the received acceptance, sending the at least one content item block to the content item block server.