Hello there, I'm working on netfs-fscache support to the kernel ceph filesystem client. The other filesystems in the kernel that have implemented it are NFS and AFS. In the cache of a inode, how do I tell that's I'm the only person that has this file open. So I can tell that I can safely cache the file. After reading the code I imagine it has something to do with the CEPH_CAP_FILE_SHARED, CEPH_CAP_FILE_EXCL and CEPH_CAP_FILE_CACHE. But I wasn't able to find enough info to know that I've implemented my cache invalidation correctly. To give you a little background. I'm doing this work because I think it has great potential for our workload. We're using cephfs as a backing store for our distributed database. Our frontend nodes (the ones that perform the querying) contain decent size SSD drives. With our primarily read workload and having a high rate of cachability for file pages that contain indexes, data extents, ISAM trees. It would be nice performance improvement. Thanks, - Milosz -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
