Senin, 15 Juli 2019

Redis Key Update Time






Redis is an open source (bsd licensed), in-memory data structure store, used as a database, cache and message broker. it supports data structures such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperloglogs, geospatial indexes with radius queries and streams.. I'm interacting with redis through phpredis (actually a higher level wrapper built around phpredis). i want to update a key and reset it in the database, but the ttl should be reset to the original value at the current point in the program my class doesn't know what the original ttl.. When we say that a key has a time to live, or that it’ll expire at a given time, we mean that redis will automatically delete the key when its expiration time has arrived. having keys that will expire after a certain amount of time can be useful to handle the cleanup of cached data..





Need for Time series Database


Need for time series database



In the record_event() function, we receive an event, get a new calculated id from redis, assign it to the event, and generate the key where the event will be stored by concatenating the string. This allows redis to manage the garbage collection for you, either relative to your manipulation (creation or update) of any given key, or in terms of an absolute (seconds since the epoch) time specification. the only trick about redis expiration is that you must re-set it every each update to a key.. Azure redis cache can cache both .net objects and primitive data types, but before a .net object can be cached it must be serialized. this .net object serialization is the responsibility of the application developer, and gives the developer flexibility in the choice of the serializer..



redis key update time

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