SQLite in WAL mode maps each database's -shm file into memory, and
network filesystems do not support that reliably, so the README now
says DATA_DIR must be local and names NFS and SMB/CIFS as unsupported.
It also says what a disk I/O error with code 522 points at and what to
try first. ZFS is not called unsupported: the one failure seen there
was never reproduced.
Model: opus-5-5
sneak