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Maximum Parcel Size

DTS transfers data in manageable chunks named parcels. The size of the parcel affects many things, including the following:

Overall transfer performance

The bigger the parcel size, the faster the transfer.

System resources the agent uses

The bigger the parcel size, the more memory an agent uses (since it has at least one parcel of data in memory at any given time during a transfer).

Checkpoint restart

After each parcel transfers, it is tagged as part of the automated checkpoint and restart feature. If a failure occurs during the transfer process, DTS can restart the transfer from the last successful parcel transfer.

System or network speed

When transferring files between agents running on slower systems or over slower networks, transfers can be suspended or can fail with the message "Connection failed to address|hostname." This condition can be due to timeouts while processing large parcels of data. If this situation occurs, we recommend reducing the maximum parcel size value for transfers to slower systems.