On Sun, Aug 4, 2019 at 3:47 AM Christian Balzer <[email protected]> wrote:
> 2. Bluestore caching still broken > When writing data with the fios below, it isn't cached on the OSDs. > Worse, existing cached data that gets overwritten is removed from the > cache, which while of course correct can't be free in terms of allocation > overhead. > Why not doing what any sensible person would expect from experience with > any other cache there is, cache writes in case the data gets read again > soon and in case of overwrites use existing allocations. This is by design. The BlueStore only populates its cache on reads, not on writes. The idea is that a reasonable application does not read data it just wrote (and if it does it's already cached at a higher layer like the page cache or a cache on the hypervisor). Paul _______________________________________________ ceph-users mailing list [email protected] http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
