mongodb acid

modification because of the isolation bounds of the serial transaction. MONGO has no multi-statement transaction syntax. Another single update involves multiple documents and non-atomic execution. When find involves multiple documents, the readConcern进行并发修改隔离。 bulk syntax may be partially successful by not supporting multi-table multi-row transactions that are common in MySQL, or single-table multi-line transactions, and can only use compensation mechanisms to achieve eventual consistency.

There are five existing dilute nitric acid production methods: Atmospheric Pressure Method and medium pressure method (0.25 ~ 50MPa), high pressure method (0.7 ~ 2MPa), synthesis method (oxidation is atmospheric pressure, absorption is pressurized) and double addition pressure (oxidation is medium pressure, absorption is high pressure ). normal Pressure Oxidation and absorption are both carried out under normal pressure, and the Investment and power c

phosphoric acid ( English:phosphoric acid) or called orthophosphoric acid (orthophosphoric acid), chemical type H3PO4 , is a common inorganic acid, non-volatile, easy decomposition, almost no oxidation. With acid, is ternary mediu

Four major features of transactions: atomicity, consistency, isolation and durability (ACID), four major acid 1. Transactions Definition: a transaction is a sequence of operations. These operations are either executed or not executed. It is an inseparable unit of work. Preparation: To illustrate the ACID principle of the transaction, we use the case of bank accou

Detailed explanation of ACID features and acid features ACID is: Atomicity, Consistency, Isolation and Durabilily ). 1. atomicity The atomic attribute is used to identify whether the transaction is completely completed. Any update of a transaction must be completely completed on the system. If an error occurs for some reason, the transaction cannot complete all i

Tags: commit status htm ref Hardware Bar Database Database transaction BSP Atitit ACID Solutions 2PC ( two phase commit ) ACID assurance across multiple DB instances 1.1. ACID Solution 1 1.2. database vendors have long recognized the need for database partitioning and introduced a 2PC ( two phase commit ) to provide a technology that spans multiple DB ins

Oracle how to ensure the ACID principle of transactions -- oracle Core Technology Reading Note 2, acid -- oracle There are four general principles in the transaction that all databases must comply with, referred to as the ACID principle. The following briefly describes how oracle implements these four principles. 1. Atomicity: one transaction can be executed in

Natural food preservativeBenzoic acid /b? N? Zo?. ? k/ , C7h6o2 (or C6h5cooh), is a colorless crystalline solid and a simple aromatic carboxylic acid. The name is derived from gum benzoin, which were for a long time it only known source. Benzoic acid occurs naturally in many plants[8] and it serves as an intermediate in the biosynthesis of many secondary

Structural Type physical and chemical properties I want to supply I want to buy Th class= "txt-right" > common name chloroacetic acid methyl ester English name methyl chloroacetate cas number 96-34-4 molecular weight 108.52 The density 1.238g/mlat 25°c (lit.) boiling point 130°c740mm Hg (lit.) molec

It's time to stop talking about the fast-food health of Acid-Base constitution. (21:18:30) Http://blog.sina.com.cn/s/blog_473788260100mlx7.html Although it is not worth mentioning in clinical professionals, we can still hear people talk about acid-base constitution and what kind of food is alkaline food at Wine tables, buses, barber shops, and gymnasiums. As doctors, bloggers are often consulted, forced to

Acid In the database transfer system, transactions have acid attributes (Jim Gray discusses transactions in detail in transaction processing: Concepts and technology ). (1) atomicity (Atomicity): a transaction is an atomic operation unit, and its modifications to the data are either all executed or all are not executed. (2) consistent: data must be consistent at the beginning and end of the transactio

This is the sterile hyaluronic acid of British Medical cosmetics, which is very easy to use. It is suitable for all types of skin, especially for dry skin, acne muscle, red blood and allergic skin. It took me a month to write a post. 650) This. width = 650; "Title =" [Skin Care log] hydrating Medical Cosmetic hyaluronic acid "style =" list-style-type: none; border-top: 0px; border-Right: 0px; border-bottom:

Structural Type physical and chemical properties I want delivery . I ask for a purchase Common name Acetic acid ethyl ester English name Ethyl acetate CAS number 141-78-6 Molecular weight 88.10510 Density 0.902 g/ml at 25°c (lit.) Boiling point 76.5-77.5°c (lit.) Molecular formula C4h8o2 Melting point −84°c (lit.)

Tags: its modified redo strong no size contains span ackACIDRefers to the four characteristics of the transaction in the database management system (DBMS): atomicity (atomicity), consistency (consistency), isolation (isolation, also known as independence), persistence (durability). In a database system, a transaction refers to a complete logical process consisting of a series of database operations. For example, bank transfer, deduction of the amount from the original account, and the addition o

Label:relational database acidI. Transactions Definition: The so-called transaction, which is a sequence of operations that are either executed or not executed, is an inseparable unit of work. Preparation: To illustrate the acid principle of transactions, we use bank accounts and money management cases (ATMs) for analysis. Create a database Create Table account ( Idint Primary key not null, Namevarchar (40), Moneydouble );

Acid refers to the four major characteristics of database transactions, the concept proposed by Jim Gray in the late the 1870s, 1983 Andreas Reuter and Theo Härder created acid this abbreviation to describe the four characteristics.　　Atomic atomicity means that a transaction is an indivisible whole, either in a completed state or in an unfinished state without an intermediate state.Conformance consistency r

. Taking 50mg, the average peak time was 2h, the peak concentration was 1.5fμg/ml. The concentration of blood drug is linearly related to dosage. The plasma protein binding rate of diclofenac was 99.7%, which was mainly associated with albumin binding. The plasma half-reduced period was 1~2h. Diclofenac can enter the synovial fluid, the concentration of peak after the plasma concentration of 2~4h is the highest in the synovial fluid. The apparent elimination of the drug in the synovial fluid was

What is the core concept of transaction processing? A transaction is a mechanism that treats a group of operations as an operation. In transaction processing, either all operations are executed, or all operations are not executed. The operations involved in transactions may depend on many different databases and servers. Acid attribute of Transaction Processing A transaction is defined by the acid att

Acid refers to the abbreviation of four basic elements for correct execution of database transactions. Includes: atomicity, consistency, isolation, and durability ). A database system that supports transactions must have these four features. Otherwise, data correctness cannot be ensured in the transaction process (transaction processing, the transaction process cannot meet the requirements of the transaction party. Atomicity All the operations

The correct division of acid and alkaline food is: where the metal elements of potassium, sodium, calcium, magnesium more food, because in vivo oxidation of basic oxides, so called "alkali food" (or alkaline food), most fruits, vegetables, soybeans, etc. belong to alkaline food, fruit in the taste of acid, But after entering the body completely oxidized to carbon dioxide and water, the remaining alkaline el