On 25.08.2011 10:09, Daniel Shahaf wrote:
Paul Querna --- who wrote the initial revprop packing patch (the f5 one, which has been reverted) --- mentions that his use case for revprop packing has vanished due to hardware upgrades (acquiring SSD l2arc disks).
From my POV, there are still 2 issues that make revprop packing worthwhile.
(1) Having a large number of (small) files can become a nuisance if you want to copy or archive repositories. Standard zip (and possibly other archive formats) doesn't support > 64k files and Windows people usually don't tar. (2) Revprop lookup *is* a performance critical operation because its result cannot be reused across multiple SVN requests and many different timestamps have to be fetched for c/o, export and log (i.e. revprop access is a frequent operation). Having fewer revprop files reduces file I/O. -- Stefan^2.
