solidity memory vs storage

As server hardware becomes more and more powerful and prices fall sharply, many companies (especially small companies) find that there are many options to buy database servers. This means that less experienced database administrators are also required to design more and more powerful systems. When you design a database system for a large system, you can buy a large database server with many hard disks and sufficient memory. The following are some basi

WHttps://dev.mysql.com/doc/refman/5.7/en/create-index.htmlMySQL:: MySQL 5.7 Reference Manual:: b.5.4.3 problems with NULL ValuesHttps://dev.mysql.com/doc/refman/5.7/en/problems-with-null.htmlYou can add an index to a column that can has NULL the values if you are using MyISAM the, InnoDB or MEMORY storage engine. Otherwise, you must declare a indexed column NOT NULL , and you cannot insert into the NULL col

The two mechanism in the storage format is converted to floating-point numbers:Floating-point variables occupy 4 bytes (4 byte) in computer memory, i.e., 32-bit, a floating-point number consists of 2 parts: base m and exponent e;Base section: The actual value of this floating-point number is represented by a 2 binaryExponent part: Occupy 8=bit space to represent, indicate the value range: 0-255; Later, we i

The following is the second part of the comprehensive anatomy of memcached. Release Date: 2008/7/9Original link: http://gihyo.jp/dev/feature/01/memcached/0002 Links to this series of articles are here: 1th Time: http://www.phpchina.com/html/29/n-35329.html 2nd time: http://www.phpchina.com/html/30/n-35330.html 3rd time: http://www.phpchina.com/html/31/n-35331.html 4th Time: http://www.phpchina.com/html/32/n-35332.html 5th time: http://www.phpchina.com/html/32/n-35333.html

Understanding the memory storage of memcachedThe memcached is a distributed cache server. This article will introduce the implementation of the internal structure of memcached and how the memory is managed. In addition, weaknesses caused by the internal structure of the memcached will also be explained.Slab allocation mechanism: Defragment

The second part of memcached comprehensive analysis is as follows. Posting date: 2008/7/9Link: http://gihyo.jp/dev/feature/01/memcached/0002 Here is the link to this series of articles: 1st times: http://www.phpchina.com/html/29/n-35329.html 2nd times: http://www.phpchina.com/html/30/n-35330.html 3rd Times: http://www.phpchina.com/html/31/n-35331.html 4th times: http://www.phpchina.com/html/32/n-35332.html 5th times: http://www.phpchina.com/html/32/n-35333.html Slab Allocation mechan

Series article Navigation: Memcached completely dissect –1. The foundation of Memcached memcached comprehensive analysis of –2. Understanding the memory storage of memcached memcached comprehensive analysis of –3. The deletion mechanism and development direction of memcached memcached comprehensive analysis of –4. The distributed algorithm of memcached Memcached a comprehensive analysis of the. memcached A

0.4*2 = 0.8 integer part 0 0.8*2 = 1.6 integer part 1 0.6*2 = 1.2 integer part 0 ...... 0.9 binary representation (from top to bottom): 1100100100100 ...... Note: the calculation process above is a loop, that is to say, * 2 will NEVER eliminate the fractional part, so that the algorithm will go infinitely. Apparently,The binary representation of decimal places is sometimes not accurate.. In fact, the principle is very simple. Can we accurately express 1/3 in a decimal system? Similarly, the bin

different data types of Redis. The actual author also offers several ways to help us save memory as much as possible, which we'll discuss in detail later.Let's start with the analysis of the use of these five types of data and how to implement them internally: StringCommon commands:Set,get,decr,incr,mget and so on.Application Scenarios:String is the most commonly used type of data, and ordinary key/value stor