pros and cons of mongodb

Learn about pros and cons of mongodb, we have the largest and most updated pros and cons of mongodb information on alibabacloud.com

The differences and pros and cons of commonly used editors, and cross-contrast editors

Now say the common editor, and we compare the differences between the editor and the pros and cons, I usually use the editor is vim, of course, there are many editors. On this blue planet, there are legends of two great artifacts: Emacs is said to be the editor of God, and Vim is the god of the editor. Emacs is an operating system disguised as an editor There is an exaggerated saying: Emacs is an operating

The differences between database stored procedures and functions, their pros and cons, and the words of each family

performance is also controllable (100 SQL statements interact once, even if the delay is increased from the same city 1ms to an offsite 50ms, also just increase 49ms, if the interaction 100 times, then increase 4900ms). In the Internet industry, where stored procedures are rarely used, one important reason is the widespread use of MySQL, while the MySQL stored procedure is weak (compared to a commercial database) and has a certain relationship with the changes in the Internet industry. Ci

Types and pros and cons of MySQL indexes

the Key_len data column for the length of the byte count. For example, for an index of an integer data column, the byte length would be 4. If a composite index is used, the Key_len data joins can also see which parts of MySQL it uses. As a general rule, the smaller the value in the Key_len data column, the better (meaning faster).The Ref data column gives the name of the data column in the other data table in the association relationship. The row data column is the number of data rows that MySQ

The difference and pros and cons of timestamp,datetime,int type in MySQL "reprint"

change the value of the other fields in the record, the value of the DateTime field does not change unless you manually change it. Timestamp1. Take up 4 bytes of 2. Null values are allowed, but values cannot be customized, so null values are meaningless.3. The timestamp value cannot be earlier than 1970 or later than 2037. This indicates that a date, such as ' 1968-01-01 ', is valid for a datetime or date value but is not valid for the timestamp value, and is converted to 0 if assigned to such

Types and pros and cons of MySQL indexes

data column gives the name of the data column in the other data table in the association relationship. The row data column is the number of data rows that MySQL expects to read from this data table when it executes this query. The product of all the numbers in the row data column gives us a rough idea of how many combinations this query needs to handle.Finally, the extra data column provides more information about the join operation, for example, if MySQL had to create a temporary data table wh

Database types and pros and cons

most widely used are Sybase 10 and syabse for SCO Unix.Features of the Sybase database:(1) It is a database based on the client/server architecture.(2) It is a truly open database.(3) It is a high-performance database.5.db2DB2 is a database management system embedded in IBM's AS/400 system, supported directly by the hardware. It supports the standard SQL language and has a gateway connected to heterogeneous databases. Therefore, it has the advantages of fast speed and good reliability. However,

MySQL engine introduction and their pros and cons

processing, then using MyISAM is the best choice for performance. (3) The size of the InnoDB table is more large, with MyISAM can save a lot of hard disk space. In this 38w table we tested, the table takes up space as follows:Engine Type MyISAM InnoDBData 53,924 KB 58,976 KBIndex 13,640 KB 21,072 KBTotal space occupied 67,564 KB 80,048 KBAnother 176W record table, where the table occupies space, is as follows: Engine Type MyIsam InnordbData 56,166 KB 90,736 KBIndex 67,103 KB 88,848 KBTotal spac

The difference between OLE DB and ODBC (pros and cons)

:"Datasource=aron1;initial catalog=pubs;integrated Security=sspi;"-OR-"Server=aron1;database=pubs; Trusted_connection=true; "(Bothconnection strings produces the same result)(Useservername\instancename as Data Source to use an Specifik SQL Server instance,only SQLServer2000)3. Connect via an IP address:"DATASOURCE=190.190.200.100,1433; Network library=dbmssocn;initial catalog=pubs; Userid=sa; PASSWORD=ASDASD; "(Dbmssocn=tcp/ipinstead of Named Pipes, at the end of the that the Data Source is the

Types and pros and cons of MySQL indexes

most efficient system, followed by const, EQ_REF, ref, range, index, and all, means that all records in the data table must be read once, corresponding to each record in the previous data table- This situation can often be avoided by an index). The Possible_keys data column gives the various indexes that MySQL can use when searching for data records. The Key data column is the actual mysql-selected index, which is given in the Key_len data column for the length of the byte count. For example, f

MySQL Time storage type pros and cons? Datetime? Timestamp?int?

Label:TIMESTAMP4 bytes of storage; values are saved in UTC format;. Time zone conversion, which transforms the current time zone when it is stored, and then converts it back to the current time zone.Datetime8 bytes stored, actual format stored, time-zone independent, DateTime retrieves and displays datetime values in ' yyyy-mm-dd HH:MM:SS ' format. The supported range is ' 1000-01-01 00:00:00 ' to ' 9999-12-31 23:59:59 ' timestamp value cannot be earlier than 1970 or later than 2037IntSave time

MySQL and NoSQL pros and cons

, scalable.-Simple, weakly structured storage.-complex operations such as joins are weak.-Transaction support is weak.-Poor versatility.-Poor support for complex business scenarios without complete constraints.Although in the era of cloud computing, traditional database has a congenital disadvantage, but NoSQL database can not replace it, NoSQL can only be used as a supplement to the traditional data can not be replaced, so the disadvantage of avoiding the traditional database is the problem tha

The differences and pros and cons of several JavaScript creation functions.

this.sayName != "function"){ Person.prototype.sayName = function(){ alert(this.name); } }}Parasitic constructor modeIt is recommended that you do not use this mode in situations where other modes are available.Secure constructor ModeSafe object: As the name implies, is very safe, refers to the absence of public properties, and its methods do not reference this object. Secure objects are best suited in some secure environments where this and new are forbidden.function

Comparison of the pros and cons of various Java-generated word solutions

solution advantages disadvantage Jacob powerful call the VBA interface directly, process The server must be: Windows system + install Office; server-side automation COM interface prone to dead processes causing server downtime Apache POI Excel operation is powerful; cross platform operation word is weak; You must write different code for DOC and docx two document formats; poor compatibility iText

Java Thread synchroize The pros and cons of two different ways

parts (the method of invoking other objects from a synchronized method can cause liveness to ask (e.g. deadlock). As an example, there is no namelist.add (name); add it to the inside.:public class Mslunch { private long c1 = 0; Private long C2 = 0; Private Object lock1 = new Object (); Private Object Lock2 = new Object (); public void Inc1 () { synchronized (lock1) { c1++; } } public void Inc2 () { synchronized (lock2) { c2++;}}

python0.1-----The pros and cons of Pyhon, why learn Python

an explanation of the process, slow running is also no way to avoid. no confidentiality : Python scripts cannot be compiled, so all Python practitioners can read the script when it is released externally. and the C/c++/java source code is compiled programming machine code. General practitioners can not read machine code, Therefore, C/c++/java developers only need to publish machine code on the external. Python 's shortcomings are so obvious, why learn python ? Before you answer this question,

What is JavaScript modularity and what are the pros and cons of

decompose between modules3. Convenient debugging and upgrading of single module function4. Multi-person collaboration and non-interference testability1. Can be divided into unit testingb> Disadvantages:Performance Loss1. System layering, call chain will be very long2. Inter-module communication, sending messages between modules can be very performance-consuming3) The most recent projects are also useful in modular, using SEAJS, but when referencing to the Jquery,jquery easyui/or jquery UI compo

Four ways and pros and cons of map traversal in Java

(MAPIteratorwhile (Entries.hasnext ()) {Map.entrySystem.out.println ("Key =" + entry.getkey () + ", Value =" + Entry.getvalue ());}}/*** No iterator traversal of generic type* @param map*/public void Methodthreen (map map) {Iterator entries = Map.entryset (). Iterator ();while (Entries.hasnext ()) {Map.entry Entry = (map.entry) entries.next ();Integer key = (integer) entry.getkey ();Integer value = (integer) entry.getvalue ();System.out.println ("key =" + key + ", value =" + value ");}}/*** Thr

PHP Single entry overview and pros and cons analysis

the blacklist.Explain the above URL, "posts": it is generally referred to as the controller, which determines which processing file to load; "index": it is generally called an action, which determines what to do. So/posts/index/as the name implies is posts homepage. If you need to pass parameters later, you can add them directly behind the action.As in the following url:http://www.nostop.org/index.php/posts/category/1/. Lists all content under the category ID of posts 1.Some of the frameworks i

Summary of the pros and cons of PHP's various mainstream frameworks

construct a certain degree of layout, easy to reuse the template, the data operation layer is good encapsulation, and codeigniter not use many too complex design patterns, Good execution performance and code readability. As for the additional library is also good, concise and efficient.Lavarel FrameAdvantagesLaravel's design idea is very advanced, very suitable for the application of various development models TDD, DDD and BDD, as a framework, it is ready for everything, composer is a PHP futur

JS Global Variables pros and cons

Advantages of global variables: You can reduce the number of variables and reduce the time consumption due to the data transfer of actual parameters and formal parameters.Disadvantages of global variables: (1) Global variables are stored in the static storage area, the program starts to run the memory allocated for it, the program ends releasing the memory. Compared with the dynamic allocation and dynamic release of local variables, the lifetime is relatively long, so too many global variables w

Total Pages: 11 1 .... 7 8 9 10 11 Go to: Go

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.