Let's suppose that I'm writing a experimental distributed filesystem that needs to open a TCP socket to another machines on the LAN, keep a pool of connections and be always aware of new data arriving (like a userspace select()). What's the best approach to implement this ? Is it better to keep all the TCP socket stuff in userspace and use an interface like netlink to talk with it ? Or, since we're talking about a filesystem (where performance is a must), is it better to keep it in kernel mode ?
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