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Tivoli Storage Manager servers use a function that is called file aggregation. With file aggregation, all objects sent in a single transaction are stored together, which saves space and improves performance. You can still query and restore the objects separately.
To use this function, all of the objects in a transaction should have the same filespace name. If the filespace name changes within a transaction, the server closes the existing aggregated object and begins a new one.
Additional LAN-free information is provided. The out structure (dsmEndGetDataExOut_t) for dsmEndGetData includes the field, totalLFBytesRecv. This is the total number of LAN-free bytes that are recieved. The out structure (dsmEndSendObjExOut_t) for dsmEndSendObjEx includes the field, totalLFBytesSent. This is the total number of LAN-free bytes that were sent.