Greetings, I am currently learning ZFS code, having some questions about spacemap writing and condensing. Is there some people can enlighten me on the big picture (because I could not find articles about these elsewhere ):
1) Space map store on disk as dnode, writing dnode blocks again needs allocation and free, is this a feed back loop and how to break this cycling dependence ? 2) During disk space near full situation, is it possible some syncing will fail becauses of cannot allocate to space map appending writes ? （I have seen some posts about failure to delete files on a full disk） 3) Is it possible to condense a spacemap even if disk space not enough to allocate a new space? ------------------------------------------ openzfs: openzfs-developer Permalink: https://openzfs.topicbox.com/groups/developer/discussions/Td20524f29bfb36ea-M43f6fd1390923df8c3a777cd Delivery options: https://openzfs.topicbox.com/groups
