Thrift is mostly used for distributed systems which run mostly in house. There is no strong demand for securing the traffic on the wire. There are however use cases in which the Thrift services are exposed as a public service. In these use cases, the Thrift traffic should be secured with SSL/TLS. It comes with a price which more work on client and server on encryption and decryption. This is not a big deal for light load server, but for heavy load server it could be a problem. It can be mitigated with hardware acceleration on load balance servers between which and the client can be SSL, but not after that to the Thrift server.
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