Question regarding pipelining

[erikseulean]

In the client implementation, there usually are two functions for each Redis operation.

For example:

client& sadd (const std::string &key, const std::vector< std::string > &members, const reply_callback_t &reply_callback)
std::future<[reply]> sadd (const std::string &key, const std::vector< std::string > &members)

Do both of these support pipelining or just the one that accepts a callback ?

My question is, in the following scenario, would the sadd be executed at the time of invocation or it will be deferred until sync_commit is called ?

const auto f1 = client.sadd("key1", {"v1"});
const auto f2 = client.sadd("key2", {"v2"});
client.sync_commit();