IMHO, that kind of plan (flush old data to disk and keep new data) is too much work and likely to hit both performance and durability. I'd like to see redis add

IMHO, that kind of plan (flush old data to disk and keep new data) is too much work and likely to hit both performance and durability. I'd like to see redis adding more features for production ready such as this one (append only log file). The RAM usage really is not a big deal since most people have their dedicated server and can easily add more RAM. Another question about the rewrite append only log file strategy. Will that have a possibility for loss data if the filesystem fails to recover from last power off? I mean, if you $rewrite$ a file, there is always a possibility.