SELECT * FROM `table_1` WHERE `reply_parent` IN (SELECT `reply_id` FROM (SELECT `reply_id` FROM `table_1` WHERE `reply_article`=69 AND `reply_type`=0 LIMIT 0, 5)AS t) UNION (SELECT * FR...
is there a persistent connection for PHP and a redis class library with reconnection function? ...
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The scenario is a simple master-slave copy. I turn off all the save instructions of the master Redis and turn on aof. But I found that the main Redis still generates rdb files and updates them all the time. my current understanding is that the master R...
set a key-value pair in redis and expire after 1000 seconds set test nnn expire test 1000 After , change the system time to this time tomorrow, using the following command: ttl test -2 The result of is-2. excuse me: what is the impact of modif...
redis queue lpush rpush inserts the queue without judging the repetition, how to avoid inserting some repetitions? redis has a collection that does not allow repetition. How can the two of them be implemented together? ...
what webapp, does is because the business logic is relatively complex, and the server is a stateless service (session, etc., cannot be used to store page data), pages are nested with each other, and it is complex to process data back and forth. Now, in ...
the lua script is simple: local current = redis.call( GET , KEYS[2]) if current == ARGV[2] then redis.call( SET , KEYS[1], ARGV[1]) return true end return false here is the java code: public static void main(String[] args) { ...
the occupation of an online redis CPU is relatively high. How to troubleshoot this? redis users provide PHP scripts to obtain data, and PHP processes data ...
when writing a lottery, when opening a lottery, the winning information is stored in redis, and then the following code is written to call it. Please check whether it is used correctly . public function giveOutGoldFoins() { $object = new...
The background is to do an activity that uses redis to store some of the user s data. is there any good way to accurately estimate the memory usage of redis ...
1. If you want to make a ranking of users gold coins, only the highest 100 records will be displayed if displayed. 2. When it comes to using redis to do the ranking, most people will think of using sorted set to do it. But if there are millions of use...
recently, we are dealing with the session sharing problem of a springboot project. The project uses springboot2.0, to control login and permissions using spring security. It is normal to share the project without session. After adding, it is reported th...
when I was writing a lottery, I encountered a problem. Because I have to modify the amount of the user winning the lottery first, then record the log, and modify the record, if one of them fails, join the queue and continue to execute. It is obviously n...
normal hadoop execution hadoop what does it mean that multiple map=0%,reduce=0% appear in succession? Last error report: Error while processing statement: FAILED: Execution Error, return code 2 from org.apache.hadoop.hive.ql.exec.mr.MapRedTask ...
I first install the LNMP one-click package, which contains the redis3.1.3 expansion package, cd lnmp1.4 src redis3.1.3 execute phpize build configuration, usr local php7.15 bin phpize then. configure-- with-php-config= usr local php7.15 bin p...
1. What kind of record is used in the card game record? I think MongoDB would be better, wouldn t it? 2. Is the logic of playing cards in any language? Is it okay to develop with php ? 3. are the rules of the game and card logic quite difficult? ...
there is a requirement: A notice is sent to specify who can read it. the simplest solution to take advantage of mysql: message Information Table id Information ID name content < hr > message_user user View Information Table id message_id Inf...
Tencent s qq generally consumes points when fighting landlords. His qq coins are usually stored in memory. in addition, he also has recharged qq coins, if stored in memory, how to ensure that after each successful recharge, the currency of memory will ...
A lot of code that you don t like, turn it off. ...
What is the function of the resave attribute in express-session? the official document is translated literally in this way < hr > : force session to be saved to session store. Even if the session is not modified in the request. But this is not necessar...
problem description Mini Program image s picture address is the byte stream interface, so the picture cannot be displayed the environmental background of the problems and what methods you have tried Mini Program login interface to display CAPTCHA...
The x < number > type, which can be a numeric value between 0 and 1, represents a vector in the X coordinate direction of the axis of rotation. The y < number > type, which can be a numeric value between 0 and 1, represents a vector in the Y coordina...
as shown in figure node_modules react-router-dom : ps: this project cannot run after the previous project has been pulled down recently. The reason should be that the previous dependency has been updated, but the previous dependency is still cited in...
would like to ask the front end of the A website how to jump to the B site, the Baidu statistics of the B site is the source of A? try A website directly with jump, the website source of Baidu statistics is visited directly. ...