redis time series

Recently using Redis, the key to do the expiration time, encountered a problem, here is not to say, I set the expiration of a key of 100 days, the results of the test process and there is no problem, but the line is frequently error. The component uses a Spring-data-redisjedis. Jedis.exceptions.JedisConnectionException:Unknown Reply:3Org.springframework.data.redis.RedisConnectionFailureException:Unknown R

require a password to access it by default, and hackers can access all the information in the database, causing serious information leaks.Fix solution:1. Bind IP that requires access to the databaseModify the "Bind 127.0.0.1" in redis.conf to the IP address that requires access to this database.Bind 192.168.31.202 192.168.31.200Bind 127.0.0.12. Set Access passwordFind the "requirepass" field in redis.conf and fill in the password you need in the back.Note: After modifying the above two methods,

Php-redis Setting the Expiration Time settimeout command line expireRedis Expiration TimeIn Redis terminology, the key that sets the expire time is called the volatile keys. It means unstable key.No expiration time is set, that is, persistent storageKey setTimeOut: SetTimeOu

: 　　　　　　　　var db = conn. Getdatabase (); #region Strings command String key = "KeyTest1"; SET command db. Stringset (Key, "10"); The Get command string value = db. Stringget (key); Console.WriteLine (value); Append command db. Stringappend (Key, "10"); Value = db. Stringget (key); Console.WriteLine (value); There is a second parameter (integer, see Stringincrement method)

This article mainly for you in detail the PHP redis implementation of 200w users of the instant push, with a certain reference value, interested in small partners can refer to How to achieve instant push for 200w users, this push can be understood to call third-party interface, push,sms and other things. At that time wrote a demo directly read the DB and then a single push, the result: Imagined So the desi

it is the most unfriendly to CPU time: When the expiration key is more, deleting the expired key may take up a significant amount of CPU time, in the case of memory tension but CPU time is very tense, Using CPU time on expired keys that are not related to the current task will undoubtedly have an impact on the respons

For details about how multiple Laravel Redis processes fetch queues at the same time, laravelredis Preface Recently, I encountered a problem in my work. Will multiple process processing queues read Redis queues repeatedly? Does this result in repeated task execution? The following is a detailed description of the sample code. Use the Supervisor to listen to Larav

Description:A Web service, the original business logic is to cache the results of the MySQL query in Redis for one hours, speeding up the response of the request. One problem now is that the response of the corresponding encoding is returned based on the specified encoding of the request.The first is to modify the response of the body encoding, because MySQL is going out is Unicode, so directly use "content = Content.encode (charset)"To convert, and t

Memcached generally set expire expired automatically deleted, and then $arr = $mem->get($key);if(empty($arr)){$sql = "select ....";$arr = $pdo->fetch();$mem->set($key,$arr,10*60);} The Redis PHP API has only one Setex setting expiration time, other list,zset do not see, if not set the cache has been in existence, memory has been increasing? How do I maintain the cache if it is updated?In fact, I want to as

Python operation Redis setting key expiration time instance code, pythonredis The Expire command is used to set the key expiration time. The key is no longer available after it expires. R. set ('2', '4028b2883d3f5a8b013d57228d760a93 ') # if the result is successful, True is returned and False is returned. The following 20 indicates 20 seconds of print r. expire (

transaction queue. The complexity of the command is the sum of the complexity of all the commands in the queue. The return value of the command is a list that contains the return value of all executed commands in the transaction queue. optimistic Lock Use locks to ensure data is correct WATCH key [Key ...] If the monitored key has been preempted by another client before the transaction commits (that is, before the EXEC command executes), the server rejects the client-committed transaction and r

All know that Redis has a REDIS-CLI implementation of the subscription publishing function, similar to this, if the master server data is modified, how real-time (in milliseconds) to notify each subordinate server change data? For example, 12306 of the ticket, Beijing, Guangzhou, the server in Shanghai, real-time real-

Public long Getsessionidbyuserid (long systemid, long Customeruserid) {if (Customeruserid = = null) {Loggerhelper.info (This.getclass (), "Custom user ID is null.");return default_session_id; }Long sessionId = GetSessionID (string.valueof (Customeruserid)); ------Determine if the user has a session record if (sessionId = = null) { --------create a new record into the database At the same time feedback SessionID querysession session = new Querysessi

Redis defaults to only support the expiration of simple keys, such as the SortedSet type, but also for the entire set of expired processing, does not support the expiration of a member of set;In order to solve this problem, the following are done:1. Store key and value information to Redis and put key in set to set key expiration time;This key can support expirat

$data = [ ' zonelist ' =$zoneList, $eqList, $mdateList , $workhoursList, $pricerangeList, ]; Redis:: Set ($cacheKeyserialize($data)); Redis:: Expire ($cacheKey, 300);The laravel façade set array needs to serialize the array first,Set expiration time by meth

interval of those parameters), and the randomness of the individual associated with the specific point of the prediction.For example, a study found that the prediction interval was calculated to include real results 95% of the time only between 71% and 87% of the time to get it (thanks to Hyndman again on his blog easy to get the results). There are many reasons, but the main reason is that uncertainty in

[Best Practices Series] PHP date, time and time zone Processing API and component processing date and time need to consider a lot of things, such as the date format, time zone, leap year and days of different months, self-processing is too error-prone. we should use the Date

fully dynamic applications through the Web. These applications usually need to be as fast as possible to provide near-real-time components. In this 5-part new series, we will learn how to use reverse Ajax (reverse Ajax) technology to develop event-driven Web applications. In this first article, we need to understand reverse Ajax, polling, streaming, Comet, and long polling ). Learn how to implement differe

Label:The following is from Segmentfault, website: An exchange website: https://segmentfault.com/How do I debug in real time when I'm adding a cache (such as Redis) to a project? Cache High concurrency Architecture Gzchen May 16 Question Follow 4 concerns Collection 0 Favorites,171 views The problem is helpful, the content is complete, and I want to know the answer .-

Project questions:When a new user logs on to the mailbox of OWA, it's always time to set the time zone, if it's a test, it doesn't matter.If it is production, you have thousands of people of the enterprise, this certainly is not possible.Workaround:The following workaround is provided by a student that I have not cared about because I do not care about the enterprise it, but this is useful for each student,