Services [Microchip: fw488888]., Wan-style, one-stop massage, spas, red, babes dirty tea you know me outside of Mahone called Zhushao Fang, only a fourth-grade level, then perhaps the parents could not afford his school fees now. Because there is no read the book a few years, Mahone very young stem from the heavy work in rural areas. Later, Mahone in a unit when a worker can be considered out of the countryside, became an official workers' state. I was very young
AOF rewrite:
Because it works AOF is continually appended to the end of the command file, so with the increasing write command, the volume of AOF documents will become bigger and bigger. For example, if you call 100 times INCR on a counter, so just to save the current value of the counter, AOF file you need to use 100 record (entry). In practice, however, use the SET command has only one large enough to hold the current value of the counter, and the remaining 99 records are actually redundant. To handle this situation, Redis supports an interesting feature: you can without interrupting service clients, for AOF file reconstruction (rebuild). BGREWRITEAOF execute commands, Redis AOF will generate a new file, this file contains the commands required to reconstruct at least the current data set.
AOF how durable?
How long before you can configure Redis will fsync data to disk first.
There are three options:
Every time there is a new command added to the file when it is executed once AOF fsync: very slow, very safe.
Fsync once per second: fast enough (and almost persistent use RDB), and only one second of data loss in case of failure.
Never fsync: the data to the operating system to handle. Faster and less safe choice.
Recommended (and also the default) measures to fsync once per second, this strategy can take into account the fsync speed and security.
Always fsync strategy is very slow in actual use, even in Redis 2.0 pairs of related procedures were improved after is still the case - frequently called fsync doomed this strategy can not be quick to get up.
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