If it fails to flushall:
config set stop-writes-on-bgsave-error no
http://stackoverflow.com/questions/19581059/misconf-redis-is-configured-to-save-rdb-snapshots
If it fails to flushall:
config set stop-writes-on-bgsave-error no
http://stackoverflow.com/questions/19581059/misconf-redis-is-configured-to-save-rdb-snapshots