Case-insensitive ext4

Posted Mar 28, 2019 18:36 UTC (Thu) by Cyberax (✭ supporter ✭, #52523)
In reply to: Case-insensitive ext4 by rweikusat2
Parent article: Case-insensitive ext4

> As I pointed out, this isn't true, at least not on Linux: It would be possible to use an incrementally maintained
Nope. There is no way to maintain this cache with any sort of consistency guarantees. Linux filesystem change notifications are not up to it.

Case-insensitive ext4

Posted Mar 29, 2019 3:03 UTC (Fri) by pabs (subscriber, #43278) [Link] (2 responses)

What are they missing now that recent Linux versions offer rename notifications and other directory change notifications?

Case-insensitive ext4

Posted Mar 29, 2019 4:21 UTC (Fri) by Cyberax (✭ supporter ✭, #52523) [Link] (1 responses)

inotify is not recursive. It's also best-effort and its notifications are asynchronous.

fanotify is better, but it also can drop events from time to time under high load.

Case-insensitive ext4

Posted Oct 4, 2023 18:51 UTC (Wed) by calumapplepie (guest, #143655) [Link]

You get an event when the queue overflows. If you clear the cache on receiving such an event, you can provide consistency guarantees, at the cost of bad performance while the cache is rebuilt. Since the queue is pretty big, overflows shouldn't happen too much.