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REDIS QUESTIONS

Storing keys in a redis set
Storing keys in a redis set
hop of those help? Yes, that's the basic approach to "indexing" in Redis. If your set is large, you'd want to use SSCAN instead of SMEMBERS. Also, don't use a single MGET for everything, but rather make batches of constant size (e.g. 100). These two
TAG : redis
Date : January 08 2021, 03:18 AM , By : user86493
Storing 13 Million floats and integer in redis
Storing 13 Million floats and integer in redis
wish helps you You can do a real good optimization by creating buckets of index vs float values. Hashes are very memory optimized internally. So assume your data in original file looks like this:
TAG : redis
Date : January 02 2021, 06:48 AM , By : Nulq
GeoServer could not get resources from Redis pool
GeoServer could not get resources from Redis pool
it should still fix some issue Are you sure that your Redis instance is accessible on localhost:6379? Are you running Redis 5+ (GeoMesa was developed against Redis 5)?You could try running through the Redis GeoMesa quickstart, which would eliminate a
TAG : redis
Date : January 02 2021, 06:48 AM , By : Erwin
Redis : Sorted sets for specific SMEMBERS
Redis : Sorted sets for specific SMEMBERS
wish help you to fix your issue You can use ZINTERSTORE as it can work with regular SETs as well. Note that it will use 1 for the elements scores, but you can remove it with a weight 0:ZINTERSTORE aux_zset 2 friends users weights 0 1
TAG : redis
Date : January 02 2021, 06:48 AM , By : Vasiliy
Redis advantages of Sentinel and Cluster
Redis advantages of Sentinel and Cluster
it should still fix some issue I will try to answer some of your questions but first let me describe the different deployment options of Redis. Redis has three basic deployments: single node, sentinel and cluster. Single node - The basic solution whe
TAG : redis
Date : January 02 2021, 06:48 AM , By : Priya
Can I define a custom compare function for redis zset?
Can I define a custom compare function for redis zset?
will help you Short answer: no, you can't do thatHowever, you can often compose multiple keys in such a way to make them sortable. In your case, an obvious candidate would be to determine the max range of the three pieces, and just compose them all i
TAG : redis
Date : January 02 2021, 06:48 AM , By : Lior
What are the key difference in using Redis Cache via ConnectionMultiplexer and AddStackExchangeRedisCache(IDistributedCa
What are the key difference in using Redis Cache via ConnectionMultiplexer and AddStackExchangeRedisCache(IDistributedCa
I hope this helps . With ConnectionMultiplexer, you have the full list of commands that you can execute on your Redis server. With DistributedCaching, you can only store/retrieve a byte array or a string, and you can not execute any other commands th
TAG : redis
Date : January 02 2021, 06:48 AM , By : George Handlin
How to use JedisCluster effectively
How to use JedisCluster effectively
hope this fix your issue I have figured out the way that JedisCluster works. Internally, it has already used Jedis Pool.The operations that JedisCluster provides follow the same pattern, take set for example:
TAG : redis
Date : January 02 2021, 06:48 AM , By : Anand
Export all offset with value of 0 on redis bitmap
Export all offset with value of 0 on redis bitmap
around this issue Because the Redis bitmap is encoded as a string, you can simply GET it and process it using bit operations in your code (e.g. write to a file all offsets of zero). The serialized bitmap string's first byte corresponds to offsets 0..
TAG : redis
Date : January 01 2021, 06:46 AM , By : user183842
How to use OR condition in Redis MATCH operation
How to use OR condition in Redis MATCH operation
fixed the issue. Will look into that further Redis' pattern matching is glob-like and thus does not offer the equivalent of an OR operation.You'll have to perform a SCAN for each of the ORed patterns, or use a Lua script for more matching power (see
TAG : redis
Date : December 25 2020, 08:01 AM , By : ganok_tor
How can i find out time when my key is stored in Redis Cache/db?
How can i find out time when my key is stored in Redis Cache/db?
I wish this help you There's no such command. However, you can achieve your goal with the EXPIRE and TTL commands.For each key, set its TTL to be 1000000000, i.e. EXPIRE key 1000000000. So that the key will be expired after about 32 years. It's shoul
TAG : redis
Date : December 24 2020, 03:28 PM , By : user147496
Load RDB file generated by Redis 4 into Redis 5
Load RDB file generated by Redis 4 into Redis 5
Any of those help All the information you've provided indicates that the RDB was indeed loaded. However. Depending on your data, the keys may be stored in different logical databases and KEYS * is run only on the default database (0). Instead, try ex
TAG : redis
Date : December 24 2020, 03:30 AM , By : user181706
Redis Synchronous replication failure scenarios
Redis Synchronous replication failure scenarios
With these it helps Master node might fail before WAIT returns, i.e. write operations haven't been replicated to all slaves. In this case, some slaves have already synced these write operations, while other haven't. When Redis Cluster tries to elect
TAG : redis
Date : December 22 2020, 05:30 AM , By : jamerson
Integration with Redis and Prometheus
Integration with Redis and Prometheus
wish of those help To scrape metrics from Redis you need data exporter for example redis_exporterWith data exporter, you have to setup ServiceMonitor and Service to point to your metrics endpoints.
TAG : redis
Date : December 20 2020, 04:44 AM , By : Pieter Taelman
how to remove subscription callbacks in redis?
how to remove subscription callbacks in redis?
it fixes the issue If I understand your question correctly. I think this is not a Redis related problem, it's just an application-level problem. You only need to call subscriber.subscribe once to set up a subscription. You want to support only one ca
TAG : redis
Date : December 18 2020, 10:29 AM , By : Shitic
How does Redis Streams handle using up all available memory?
How does Redis Streams handle using up all available memory?
it helps some times Streams are data structures like all others, so Redis will respect the maxmemory and maxmemory-policy in case of RAM pressure. Depending on the policy, new write requests will be denied, or existing keys (streams or not) will be e
TAG : redis
Date : November 27 2020, 12:01 PM , By : Chris Tattum
Sqlite Replication Using Redis
Sqlite Replication Using Redis
Hope this helps You might be interested in this hack:
TAG : redis
Date : November 25 2020, 07:22 PM , By : n3txpert
twemproxy(nutcracker), Error: Protocol error, got "{" as reply type byte
twemproxy(nutcracker), Error: Protocol error, got "{" as reply type byte
it fixes the issue At last, I solved this by myself.It is because twemproxy will listen on two ports when it starts, one of them is port 22222(by default, you can set it with '-s'), it is used for monitoring, if you connect to it, the error occurs
TAG : redis
Date : November 14 2020, 04:48 PM , By : Keniwan
redis-ha in kubernetes cannot failover back to master
redis-ha in kubernetes cannot failover back to master
hop of those help? It turn out that the problem is related to the used of host name instead of IP:
TAG : redis
Date : November 09 2020, 04:01 AM , By : Ted Leung
How to use SCAN commands in Jedis
How to use SCAN commands in Jedis
To fix the issue you can do In the good tradition of answering own questions, here is what I found out:
TAG : redis
Date : November 06 2020, 09:01 AM , By : al.
How to scale Redis?
How to scale Redis?
like below fixes the issue You've only two options: You refactor your application layer to use sharding (i.e. Redis Cluster). You use regular master-slave replication to load balance your Redis work load.
TAG : redis
Date : November 06 2020, 09:01 AM , By : user184975
Understanding memory consumption of a key in redis
Understanding memory consumption of a key in redis
wish of those help DEBUG OBJECT shows you the serializedlength of the object. It's the size of the serialized data when saving the object on disk in RDB format. It's NOT the size of the object in memory.When saving data on disk, Redis might compress
TAG : redis
Date : November 06 2020, 04:01 AM , By : BinaryBoy
Redis store design for traditional "select * from where and " type query
Redis store design for traditional "select * from where and " type query
seems to work fine Redis is not a replacement for SQL databases. They have different purposes. In Redis you should design based on how you will access the data.See this and this SO questions.
TAG : redis
Date : November 04 2020, 08:15 AM , By : enginecrew
Does redis SLOWLOG command measure CPU time or real time?
Does redis SLOWLOG command measure CPU time or real time?
To fix the issue you can do The SLOWLOG gives time in wall clock sense, not CPU. Entries are added to the log when commands exceed the configured threshold for execution time. If the CPU is starve and regular or fast operations take longer to complet
TAG : redis
Date : November 02 2020, 03:01 PM , By : algoRhythm99
How to find in sorted set an element which is just below a certain value
How to find in sorted set an element which is just below a certain value
seems to work fine First, I am new to Redis. Well let's say I have done: , Like above, but for below, use ZREVRANGEBYSCORE, you should.
TAG : redis
Date : November 01 2020, 03:09 PM , By : Daniel Halsey
an error "(error) ERR illegal address " happen in redis command
an error "(error) ERR illegal address " happen in redis command
Hope that helps It seems you are in aliyun, I face the same problem, so I ask it in the aliyun forum, https://bbs.aliyun.com/read/540217.html?displayMode=1I solve this problem finally, you should set the redis's white list correctly in Redis-> Securi
TAG : redis
Date : October 30 2020, 04:01 PM , By : CSCI GOIN KILL ME
Geo.Lua function GEOMETRYFILTER and Redis
Geo.Lua function GEOMETRYFILTER and Redis
fixed the issue. Will look into that further geo.lua's author here - IIRC it involves first creating a polyhash to describe the filter and then providing it along with the geoset to the library. Performance is quite horrible as everything is done in
TAG : redis
Date : October 28 2020, 07:40 AM , By : Revision17
How to delete keys matching a pattern in Redis Cluster
How to delete keys matching a pattern in Redis Cluster
this will help Answers for that question try to remove multiple keys in a single DEL. However, keys matching the given pattern might NOT locate in the same slot, and Redis Cluster DOES NOT support multiple-key command if these keys don't belong to th
TAG : redis
Date : October 17 2020, 08:10 PM , By : Erik
Copying all KEYS from one db to another in same Redis
Copying all KEYS from one db to another in same Redis
I wish this help you It's not an error.In your case, the keys you scanned might have been expired when you try to migrate it. If the key you want to migrate doesn't exist in the source database, MIGRATE command will return NOKEY.
TAG : redis
Date : October 08 2020, 07:00 AM , By : Simone
Whether redis scan will scan data inserted after scan operation started?
Whether redis scan will scan data inserted after scan operation started?
help you fix your problem From the doc:
TAG : redis
Date : October 06 2020, 08:00 AM , By : paolodm
TYPE option does not work for REDIS SCAN command
TYPE option does not work for REDIS SCAN command
wish help you to fix your issue The code for TYPE option is still in the unstable branch, and haven't been release to the latest version of Redis. So far, you cannot use that command. You have to wait for the new release to support this feature, or t
TAG : redis
Date : October 05 2020, 09:00 AM , By : micaleel
Is it possible to use Redis as In Process or Local cache?
Is it possible to use Redis as In Process or Local cache?
it fixes the issue Yes, you can use it as a local cache server.You can set up Redis into your local (Ubuntu) machine or in LAN and by pointing it you can use.
TAG : redis
Date : October 05 2020, 06:00 AM , By : Eran Yahav
How to expire a HyperLogLog in Redis?
How to expire a HyperLogLog in Redis?
wish help you to fix your issue NO, you cannot expire items added to the HLL. Instead, EXPIRE command will expire the whole HLL.In order to achieve your goal, you can create HLL for each hour, and expire the whole HLL after some time.
TAG : redis
Date : October 04 2020, 07:00 PM , By : FarmerDave
Regarding Entering Key in LPush
Regarding Entering Key in LPush
this one helps. The 'WRONGTYPE' error means that the key already has a value but of another type. In your case, the key isn't a list so you can LPUSH into it.You can find the key's type with the TYPE command. If you want to create a list in that key,
TAG : redis
Date : October 04 2020, 08:00 AM , By : k19k
How to tag a key in REDIS so later I can remove all keys that match this tag?
How to tag a key in REDIS so later I can remove all keys that match this tag?
help you fix your problem There's no built-in way to do that. Instead, you need to tag these pages by yourself: When setting a page-data pair, also put the page id into a SET of the corresponding user. When you want to remove all pages of a given use
TAG : redis
Date : October 04 2020, 08:00 AM , By : NeedOptic
Redis multiple persistence policies
Redis multiple persistence policies
help you fix your problem I was wondering whether it is possible to have a single Redis server instance having multiple active persistence policies. , Is this doable?
TAG : redis
Date : October 02 2020, 03:00 AM , By : DonMac
How to create a key that will sum 2 keys values in Redis
How to create a key that will sum 2 keys values in Redis
I wish this helpful for you By using EVAL(Lua interpreter) it will work., Command to achieve A+B and set in C,EVAL "return redis.call('set','C',redis.call('get','A')+redis.call('get','B'))" 0
TAG : redis
Date : October 01 2020, 07:00 PM , By : greggerz
Clear Redis-Cli history on Windows machine
Clear Redis-Cli history on Windows machine
I hope this helps . If you don't want the history to be kept in %HOMEDRIVE%%HOMEPATH%\.rediscli_history file at all - you can set the environment variable REDISCLI_HISTFILE=/dev/null and it will prevent the history to be saved.
TAG : redis
Date : September 30 2020, 01:00 AM , By : Milander
Redis MEMORY USAGE & INFO MEMORY
Redis MEMORY USAGE & INFO MEMORY
With these it helps No, even if you sum up that output from MEMORY USAGE, you will not get to the sums reported by INFO MEMORY.MEMORY USAGE attempts to estimate the memory usage associated with a given key - the data but also its overheads.
TAG : redis
Date : September 27 2020, 11:00 AM , By : toma
Implementing Queue with unique elements in Redis
Implementing Queue with unique elements in Redis
will help you I'd actually look into using a single Sorted Set, setting the scores as timestamps and using ZADD's "NX" flag. This will provide both ordering and uniqueness.
TAG : redis
Date : September 26 2020, 10:00 PM , By : Frank
AWS RedisConnectionException: No connection is available to service this operation. SocketClosed Exception
AWS RedisConnectionException: No connection is available to service this operation. SocketClosed Exception
seems to work fine Yes, Issue has been resolved for now. There is some issue in old version of Redis which although the timeout set, is not closing the connections.
TAG : redis
Date : September 26 2020, 01:00 PM , By : yarry
Why redis pubsub working is independent of database?
Why redis pubsub working is independent of database?
wish helps you I am newbie to Redis and trying to understand concept of Redis PubSub. , it's a matter of design choice really.
TAG : redis
Date : September 26 2020, 09:00 AM , By : Josh
Which one to use Hset or HMSet in Redis?
Which one to use Hset or HMSet in Redis?
help you fix your problem HMSET has been deprecated as of redis 4.0.0 in favor of using HSET with multiple key/value pairs:https://redis.io/commands/hset
TAG : redis
Date : September 25 2020, 04:00 PM , By : Eniac
Is there a way to not allow anyone to flushAll in redis?
Is there a way to not allow anyone to flushAll in redis?
it helps some times You can use rename-command in your config. According to the security section of redis.conf:
TAG : redis
Date : September 25 2020, 03:00 PM , By : CrookedNumber
Limit the allowed commands for Redis client
Limit the allowed commands for Redis client
it helps some times Up to Redis v5, there is no built-in way to do that.Starting with Redis v6 (ETA soon(TM) ;)) you will be able to use the Access Control List features. In a nutshell, ACL allows the definition of users and their respective permissi
TAG : redis
Date : September 25 2020, 03:00 PM , By : Timbo
check keys that are set without expiry time in aws redis
check keys that are set without expiry time in aws redis
seems to work fine Redis doesn't store the key's creation time. If you want, you can maintain a separate data structure in order to store this information. For example you can use a hash that maps each key to its creation (or last update) time. It's
TAG : redis
Date : September 13 2020, 09:00 AM , By : Hans-Inge
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