GRPC
client side msg: header, msg, EOS
server side msg: header, msg, msg, Trailer
over http2
keep live?
c++ async or sync? https://grpc.io/docs/languages/cpp/async/ , does it provider more performance than sync one?
https://github.com/grpc/grpc/blob/v1.41.0/examples/cpp/helloworld/greeter_async_server.cc
https://stackoverflow.com/questions/68767309/difference-between-sync-and-async-grpc
https://docs.microsoft.com/en-us/dotnet/standard/async-in-depth
https://www.hellsoft.se/understanding-cpu-and-i-o-bound-for-asynchronous-operations/
CPU Bound means the rate at which process progresses is limited by the speed of the CPU. A task that performs calculations on a small set of numbers, for example multiplying small matrices, is likely to be CPU bound.
I/O Bound means the rate at which a process progresses is limited by the speed of the I/O subsystem. A task that processes data from disk, for example, counting the number of lines in a file is likely to be I/O bound.
Memory bound means the rate at which a process progresses is limited by the amount memory available and the speed of that memory access. A task that processes large amounts of in memory data, for example multiplying large matrices, is likely to be Memory Bound.
Cache bound means the rate at which a process progress is limited by the amount and speed of the cache available. A task that simply processes more data than fits in the cache will be cache bound.
I/O Bound would be slower than Memory Bound would be slower than Cache Bound would be slower than CPU Bound.
The solution to being I/O bound isn’t necessarily to get more Memory. In some situations, the access algorithm could be designed around the I/O, Memory or Cache limitations. See Cache Oblivious Algorithms.
https://stackoverflow.com/questions/868568/what-do-the-terms-cpu-bound-and-i-o-bound-mean
protobuf ( how to pass binary ?)
https://docs.microsoft.com/en-us/aspnet/core/grpc/performance
how to send binary data in protobuf
Json <–> Proto buff
https://developers.google.com/protocol-buffers/docs/reference/cpp
https://stackoverflow.com/questions/34906305/protocol-buffer3-and-json
// json does not support binary data, need to encode binary to text ( base64 etc)
message MyRequest {
string userId = 1;
map<string, string> params = 2;
} https://developers.google.com/protocol-buffers/docs/proto3
https://www.youtube.com/watch?v=7qL38ea9Ji4&ab_channel=CNCF%5BCloudNativeComputingFoundation%5D
