REDIS QUESTIONS

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

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

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

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

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?

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

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

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

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

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?

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

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

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

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?

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?

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

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

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

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

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?

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

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

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?

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

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

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

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

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

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?

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

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?

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?

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

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?

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

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

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

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

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

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

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?

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?

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?

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

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

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