Cache synchronisation issue

[socketpair]

I mount the same S3 bucket on more than 1 node. So I have issue with "sticky" cache.

If I change something through Geesefs on one node (and sync()), other nodes may not see the changes if the same files were accessed recently on them.

I need some way to reset (or sync) the cache.

Is it possible to sync the cache somehow without re-mounting ?