[vinceyuan]

Does it mean the async functions about file system operations are not really asynchronous in Node.js? The whole node.js server will be blocked if the number of file system operations is bigger than the thread pool size. :-(

[laggyluke]

Not the whole server - most of the networking IO will work just fine, only the operations that use libuv thread pool will be queued.

[vinceyuan]

Got it. queued != blocked Thanks!