Chapter 6 HPSS ConfigurationHPSS Installation Guide September 2002 347Release 4.5, Revision 2Server ID The UUID of the MVR.This ID is copied overfrom the selected MVRgeneral configurationentry.The UUID of the MVR. This fieldcannot be modified. It is displayedfor reference only.Extractedfrom theMVR generalconfigurationentry.Buffer Size The buffer size (of eachbuffer) used for doublebuffering during datatransfers.The minimum mover buffer size isthe size of smallest block size forany device the Mover will handle.The maximum value will bebounded by the available systemmemory and the number ofconcurrent mover requestsanticipated.1,048,576Advice: This value should be tuned based on device and networking configurationand usage. The trade-off for this value is that large buffer sizes will use more systemmemory and may be inefficient for small transfers (e.g., if the mover buffer size is4MB, but client requests are 512KB, the Mover will not achieve any doublebuffering benefit because the entire amount of the transfer fits in one mover buffer).A smaller buffer size will cause device and network I/O to be broken more often,usually resulting in reduced throughput rates for all but the smallest transfers.TCP Port The TCP/IP port numberused for the TCP/IP listenprocess to receiveconnections.Should be a value over 5000. 5001Advice: The port number must be unique for MVRs running in the same node.For Movers running in non-DCE mode, the Mover will internally use the port onegreater than the one configured in this field on the non-DCE/Encina platformduring initialization (e.g., if 5001 is entered, port 5002 is used on the non-DCE/Encina node); therefore available port ranges on both nodes must be taken intoconsideration when selecting this value.Table 6-23 Mover Configuration Variables (Continued)Display Field Name Description Acceptable Values DefaultValue
