Snapshot marker

A system for recording data transmitted to a storage system, the data comprising initial data items and additional data items, wherein the initial data items are transmitted to the storage system prior to a moment in time, and the additional data items are transmitted to the storage system after the moment in time, wherein the storage system comprises:

• a cache for receiving data transmitted to the storage system, for flushing one or more of the initial data items to the at least one storage device, and for receiving one or more additional data items while flushing at least one of the initial data items;
• and
• a controller for recording the initial data items.

A system for recording data transmitted to a storage system, the data comprising data items transmitted to the storage system, wherein the storage system comprises:

• a cache for receiving data items;
• and
• a controller for inserting a marker into the cache, wherein the marker is an indication that one or more of the data items received by the cache are to be recorded, and for recording the one or more of the data items.

A system for recording data generated by a client server and transmitted to a storage system, comprising:

• a memory for storing data, received from the client server, in the storage system;
• and
• a controller for receiving a command from the client server to perform a snapshot of the data, and for generating a snapshot of the data stored in the storage system in response to the command.

A system for recording data stored in a storage system, comprising:

• a client server for generating data, for transmitted the data to a storage system for storage, for generating a command to perform a snapshot of the data stored by the storage system, and for transmitting the command to the storage system to perform a snapshot of the data;
• and
• a storage system for receiving the data from the client server, for receiving the command from the client server, and for performing the snapshot of the data in response to the command.