Re: Question regarding performance on big files.

Stan Hoeppner
2010-09-23T22:02:45Z

Mathieu AVILA put forth on 9/23/2010 3:55 AM:

> The small writes are amortized in the stream of data writes from the
> application, and the application is not frozen.
> (so you were right: there was a page cache issue)

Given what you've described about the streaming write behavior of your
application, I'd suggest you rewrite it and use O_DIRECT writes to
bypass the page cache completely. You may also want to look into using
the XFS realtime subvolume feature.