将一个 redis db 复制到另一个 redis db.zip

# RedisCopy This utility provides a way to move the contents of one redis DB to another redis DB. It is inspired by the [redis-copy.rb script][original] included in the redis source, but aims to always support all object types and to use the most-efficient methods and commands available to your redis versions: - if available on both dbs, will use `DUMP`/`RESTORE` commands (redis v2.6+) - if available on source db, will use `SCAN` instead of `KEYS` (redis v2.8+) [original]: https://github.com/antirez/redis/commits/unstable/utils/redis-copy.rb ## Installation $ gem install redis-copy ## Usage The current options can be grabbed using the `--help` flag. ``` $ redis-copy --help redis-copy v1.0.0 (with redis-rb 3.0.6) Usage: redis-copy [options] <source> <destination> <source> and <destination> must be redis connection uris like [redis://][<username>:<password>@]<hostname>[:<port>][/<db>] Specific options: -p, --pattern PATTERN Only transfer matching keys (default *) See http://redis.io/commands/keys for more info. -v, --[no-]verify [PERCENT] Verify percentage of transfers -- VERY SLOW (default 0) -n, --[no-]allow-nonempty Allow non-empty destination (default false) -f, --[no-]fail-fast Abort on first failure (default false) --[no-]pipeline Pipeline redis commands where available (default true) -r, --require FILENAME Require a script; useful for loading third-party implementations of key-emitter or copy strategies. Relative paths *must* begin with `../' or `./'. -d, --[no-]debug Write debug output (default false) -t, --[no-]trace Enable backtrace on failure (default false) --[no-]prompt Prompt for confirmation (default true) --[no-]dry-run Output configuration and exit ``` ## Example: ``` $ redis-copy --no-prompt old.redis.host/9 new.redis.host:6380/3 Source: redis://old.redis.host:6379/9 Destination: redis://new.redis.host:6380/3 (empty) Key Emitter: Scan Strategy: DumpRestore PROGRESS {:success=>1000, :attempt=>1000} PROGRESS {:success=>2000, :attempt=>2000} PROGRESS {:success=>3000, :attempt=>3000} PROGRESS {:success=>4000, :attempt=>4000} DONE: {:success=>4246, :attempt=>4246} ``` ## Extensibility: `RedisCopy` uses the [implements][] gem to define interfaces for key-emitter and copy strategies, so implementations can be supplied by third-parties, secondary gems, or even a local script; the interface shared examples are even available on your load-path so you can ensure your implementation adheres to the interface. See the existing implementations and their specs for examples, and use the `--require` command-line flag to load up your own. Since `implements` treats last-loaded implementations as inherently better, `RedisCopy` will automatically pick up your implementation and attempt to use it before the bundled implementations. [implements]: https://rubygems.org/gems/implements ## Contributing 1. Fork it 2. Create your feature branch (`git checkout -b my-new-feature`) 3. Commit your changes (`git commit -am 'Add some feature'`) 4. Push to the branch (`git push origin my-new-feature`) 5. Create new Pull Request