Check-and-increment a counter in Redis - Stack Overflow Howerver if I just GET and then INCR a value I might run into a race condition that will result in the operation being done more than N times How do I perform some kind of test-and-incr operation against Redis?
What is the meaning of the content of the manifest file in Redis when . . . Multi-part AOF file format (Since Redis 7 0) consists with a base AOF or RDB file and multiple incr AOF files which includes the new commands since the base file is created And the manifest file is used to track these files Each line in a manifest file describes a base or incr file The following is the format of each line: file filename seq sequence-number type file-type There're 3 types of
how to make sure counter atomic by using redis incr command 3 I'm using redis incr as our request counter as I researched incr is a atomic and thread-safe, now I wanna add expire time for each key but seems this process is not thread-safe, for example, redis crash only after incr done and before Expire command running, the basic pseudocode is as below: value := redisClient getValue(key)
redis service fails with permission denied on append file My redis service (installed from source) fails with this message in var log redis log 2309:C 16 Mar 2019 20:16:10 633 # Redis version=5 0 3, bits=64, commit=00000000, modified=0, pid=2309, just s
how to increment variable by 0. 5 in using for loop? By default, incr increments by 1 unit when no specific number is mentioned incr i 2 will increment i by 2 on each iteration incr i -1 will decrement i by 1 on each iteration You can thus change the number to be whatever you need it to be The only problem is that you can only increment by an integer So you'll have to use something else for
A race condition when using Redis command incr and expire Imagine that you drop connection to redis server after INCR command was already executed but before EXPIRE was executed In this case you never execute EXPIRE becouse as next call of code gives your value > 1 In redis documentation the term race condition used But it is not successful term A more correct term is imperfect algorithm So this case not about race condition between 2 or more
Autoincrement in Redis - Stack Overflow INCR some global variable, let's say g_message_id, and save INCR's return value (the current value of g_message_id) LPUSH the new message (including the id and the actual message) into a list