On 21 Feb 2022, at 15:55, Trond Myklebust wrote: > > We will always need the ability to cut over to uncached readdir. Yes. > If the cookie is no longer returned by the server because one or more > files were deleted then we need to resolve the situation somehow (IOW: > the 'rm *' case). The new algorithm _does_ improve performance on those > situations, because it no longer requires us to read the entire > directory before switching over: we try 5 times, then fail over. Yes, using per-page validation doesn't remove the need for uncached readdir. It does allow a reader to simply resume filling the cache where it left off. There's no need to try 5 times and fail over. And there's no need to make a trade-off and make the situation worse in certain scenarios. I thought I'd point that out and make an offer to re-submit it. Any interest? Ben
