you shouldn't have to change anything. Just use: std::ostreamstream ostr(std::io_binary); boost::archive::binary_oarvhice oa (ostr); oa & foo; Robert Ramey Alexander Dong Back Kim wrote:

Dear members,

I'm trying to use binary_oarchive instead of text_oarchive because I expect using binary may decrease the size of archive compare to using text_oarchive.

std::ostreamstream ostr; boost::archive::text_oarvhice oa (ostr); oa & foo;

The codes above works fine and I could do deserialization as well without any problem. In this case if I want to use binary_oarchive, what codes should I have to add?

Any suggestion or advice will be appreciated. Thank you very much at all time.

regards,