Redis 2.2.0 RC1 新特性:很多都是我所期待的;
- Specially encoded data types, small lists and sets can now use up to an order of magnitude less memory.
- VM partial rewrite for code cleaness and memory usage.* Change to
the implementation of the top level dictionary for better memory
efficienty.
- redis-cli is hugely improved: tab completion, inline help (Thanks to
TJ Holowaychuk), raw output, rewritten using the new hiredis C library.
- Networking internals rewritten for efficiency. You can expect LRANGE and similar commands to be at least 10 times faster.
- Most read only commands are now copy-on-write friendly, this means
that Redis will use little memory when a saving child is active and the
parent process is mostly stressed by read queries.
- Non blocking replication even from the point of view of the slave,
with configurable behavior about what to do when the link is
disconnected. You can select if serving old data or replying with an
error.
- Check-and-set (CAS) transactions with the new WATCH command.* Now
write operations work against keys with an EXPIRE set! Imagine the
possibilities.
- New maxmemory eviction policies. It is possible to select among LRU,
farest TTL expire, and other algorithms, and if when the memory limit
is reached only keys with an expire set or all the keys should be
expired.
- SETBIT / GETBIT / SETRANGE / GETRANGE / STRLEN. Now your strings are your arrays!* Syslog support (Thanks to Jonah H. Harris)
- Unix domain socket support.
- New List related functions LINSERT, LPUSHX, RPUSHX (Thanks to Robey Pointer)
- BRPOPLPUSH (Thanks to Michel Martens and Damian Janowski)
- Much more interesting informations in the INFO output.
- Sorted sets are now less memory hungry.
- Non blocking loading of .rdb / AOF file on startup, with progress information in the INFO output.
- Now Redis has a clean, powerful, supported C library: hiredis.
- Code layout completely new, the 2.0.x huge redis.c file is now splitted in many parts.
- Redis-benchmark rewritten to be faster and in order to use hiredis as well.
- Endless other CPU optimizations and bugs fixed.
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