Ruby Redis Set Hash

Benchmark retrieving from redis and converting back to a hash user system total real json parse 3 440000 1 070000 4 510000 5 497154. Redis hashes are maps between the string fields and the string values. Eval and evalsha must only rely on keys that map to a single slot again possible with hash tags keys should be used to retrieve keys in lua scripts.

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When pulling out the packed data from redis and unpacking it the hash is slightly corrupted.

Ruby redis set hash.

Redis hashes are maps between string fields and string values so they are the perfect data type to represent objects e g. Note that all keys used in a pipeline must map to the same redis node. Increments the number stored at field in the hash stored at key by increment if key does not exist a new key holding a hash is created. Hence they are the perfect data type to represent objects.

In redis every hash can store up to more than 4 billion field value pairs. Ruby redisbm rb help db options. See rubydoc info for the api docs of the latest published gem. A set in redis is an unordered list with an external behavior similar to that of ruby arrays but optimized for faster membership lookups.

As usual check the full list of set commands for more information or read the introduction to redis data types. It s used internally by ohm to keep track of the instances of each model and for generating and maintaining indexes. This is possible through the use of redis cluster hash tags where only the section of a key name wrapped in when calculating a key s hash. This appears to happen when the hash values are beyond a certain length although i can t say that for sure.

The value at field after the increment operation. If field does not exist the value is set to 0 before the operation is performed. A list is like an array in ruby. Driver default hiredis choose redis driver db number 10 choose number of db 0 by default db socket path or s use unix domain socket instead of tcp connection default path is tmp redis sock prefix set hashes names and key s names prefix to protect from overwriting existing values flush.

Gem install redis you can connect to redis by instantiating the redis class. The range of values supported by hincrby is limited to 64 bit signed integers. A ruby client that tries to match redis api one to one while still providing an idiomatic interface. A user with a number of fields like name surname age and so forth.

I ve pasted a test case below. In the above example we have set redis tutorials detail name description likes visitors in hash named tutorialspoint. It s perfectly suited for queues and for. I m using redis 2 4 17 default config ruby 1 9 3p194 messagepack 0 4 7 and the redis gem 3 0 2.

Return value integer reply.