Use pwritev()

[benbjohnson]

Use pwritev() when flushing data to disk so that we can batch multiple pages into a single syscall.

/cc @siddontang @pkieltyka

[pkieltyka]

👍

[pkieltyka]

aren't you on vacation? haha

[benbjohnson]

That's what my wife keeps trying to tell me. :)

[siddontang]

er...... vacation is unimaginable in China.

[pkieltyka]

hey guys, just wondering if this is on the radar, since it sounds like it can help with write performance?

[benbjohnson]

I haven't made any progress on this yet. It hasn't been much of a priority because I'm not sure how much it'll actually help performance. The main performance issue with random writes is that they amplify writes a ton. You likely end up getting throttled by disk write speed and not syscall invocation time.