squarespace pros and cons

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MariaDB Galera Cluster Features Introduction (Pros and cons)

aborts, the cluster returns a deadlock error code (error:1213 sqlstate:40001 (Er_lock_deadlock)).(7). XA transactions are not supported due to possible rollback on commit.(8). The write throughput of the entire cluster is limited by the weakest node, and if one node becomes slow, the entire cluster will be slow. For stable high-performance requirements, all nodes should use unified hardware.(9). Cluster nodes suggest a minimum of 3.(10). If there is a problem with the DDL statement, the cluster

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

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