Gesendet: Freitag, 31. Oktober 2014 um 00:50 Uhr
Von: "Johnny McCullough" <johnny.mccullough@gmail.com>
An: boost-users@lists.boost.org
Betreff: [Boost-users] (no subject)
I'm new to boost, and I'm wondering about the best / most efficient way to transfer a large dataset via boost::asio.
I've retrieved a datasetfrom a database (Cassandra) and I'm using boost asio to provide a network service that responds to queries.
So I have a client socket and a dataset. I have to iterate the dataset, perform some simple formatting (e.g. csv, json, xml), then write it out to the client socket. But there's a lot of data. Perhaps gigabytes.
So my initial thoughts were the producer / consumer pattern - the producer writing to a streambuf and the consumer async_write-ing it out to the client's socket.
But I'm not sure this is a good approach - I know that streambuf isn't threadsafe and so managing the streambuf with locks may well become a performance bottleneck.
Obviously, I don't want to replicate what may be gigabyte(s) of data from a resultset into a buffer just so it can be written out to a socket, So should I write this data synchronously straight to the socket instead? What's the best approach to solving this kind of problem?
thanks for your consideration
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