RPC Lаtency Limits The cоntext fоr this questiоn is the sаme аs the previous question. [6 points] A legacy low-latency RPC system for a distributed operating system operates over 100 Gbps Ethernet hardware that occasionally exhibits packet corruption, even when Ethernet CRC checks pass. To guard against such errors, the system currently uses software-based UDP checksums, which add about 180 µs per RPC, contributing roughly 7% of the total latency for a minimal RPC call. An improved integrity verification mechanism is being considered to reduce latency while maintaining correctness. The following 2 approaches are being considered - Hardware-only -> Use NIC checksum offload, no software checksums Hardware Software Combined -> Use NIC checksum offload together with an additional lightweight application-level checksum in the RPC protocol. b) [2 points] If you have machines that have cross-datacenter communication across the Wide Area Internet, what check-sum strategy would you use? Justify your answer.
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TrаshCаn оbjects аre created by calls tо a cоnstructor with a double parameter that represents the trash can’s capacity, which is themaximum weight, in pounds, that a TrashCan object can hold. Assume that this value will be greater than or equal to 0. Whena Trashcan object is constructed, it is initially empty and its contents have a weight of 0 pounds.The TrashCan class contains an acceptTrash method, which has a double parameter that represents the weight, in pounds, of thetrash that will be deposited into the trash can. The amount to be deposited will always be greater than 0 and less than the capacity ofthe can. If there is already trash in the trash can, the amount to be deposited, combined with the existing trash, may reach or exceed thecan’s capacity. In this case, the trash can will be filled to its capacity and then emptied before the remaining trash is accepted. Thetrash can should always be emptied when the weight of the trash in the can reaches the can’s capacity. The acceptTrash methodreturns a double that represents the number of pounds of trash that can still be added to the trash can before it is completely filled.The following table contains a sample code execution sequence and the corresponding results. The code execution sequence appearsin a class other than TrashCan. Statement ReturnValue(blankif novalue) Explanation double remaining; TrashCan kitchen =new TrashCan(10.0); A TrashCan object named kitchen is constructed with a capacity of 10pounds of trash. Initially there are 0 pounds of trash in the trash can. remaining =kitchen.acceptTrash(2.5); 7.5 kitchen now holds 2.5 pounds of trash and can take 7.5 more pounds beforeit needs to be emptied. remaining =kitchen.acceptTrash(3.5); 4.0 kitchen now holds 6 pounds of trash and can take 4 more pounds before itneeds to be emptied. remaining =kitchen.acceptTrash(6.0); 8.0 kitchen accepts 4 pounds of trash, reaching the 10-pound capacity, and isthen emptied. The remaining 2 pounds of trash are then accepted. kitchennow holds 2 pounds of trash and can take 8 more pounds before it needs tobe emptied. TrashCan bedroom =new TrashCan(3.0); A TrashCan object named bedroom is constructed with a capacity of 3pounds of trash. Initially there are 0 pounds of trash in the trash can. remaining =bedroom.acceptTrash(1.0); 2.0 bedroom now holds 1 pound of trash and can take 2 more pounds before itneeds to be emptied. remaining =bedroom.acceptTrash(3.2); 1.8 bedroom accepts 2 pounds of trash to reach the 3-pound capacity and thenis emptied. The remaining 1.2 pounds of trash are then accepted. bedroomnow holds 1.2 pounds of trash and can take 1.8 more pounds before it needsto be emptied. Write the complete TrashCan class. Your implementation must meet all specifications and conform to the examples shown inthe table.