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OracleADGHeartbeatfailedtoconnecttostandby fault case

primary database or the FAL server to archive logs to the standby database, the Data Guard name of the primary or FAL server must be in the Data Guard configuration of the standby. Find the following article in MOS: Primary Remote log shipping failing with ORA-16057-Server not in Data Guard configuration (Doc ID 1570928.1) In this Document Symptoms Cause Solution Applies:Oracle Database-Enterprise Edition-Version 12.1.0.1 and laterInformation in this document applies to any platform. Sympt

1 days equals 86,400 seconds?

Date arithmetic is often used in writing code. Most of the time, for convenience, it is possible to simply add and subtract a timestamp: $time = mktime (0, 0, 0, 8, _hour_later); $one = Date (' y-m-d h:i:s ', $time + 3600); This is a simple code to get a timestamp after an hour, but if you zoom in to a unit above the day, is this timestamp really what you want? For example, if you have a time stamp of 0 o ' Day, you want to know the time stamp of 0 o ' day after 5 days, simply add the time aft

PHP mining of XML and HTML data

in either of the two methods. The primary way to store data is to store the data in the nested tag. The following is a simple example. if you have an address, the data can be stored in the document as follows: 1234 Main Street, Baltimore, MD You can nest these XML data points to create a list of multiple addresses. You can put all these addresses in another tag and mark them as locations in this example (see listing 1 ). Listing 1. multiple addresses in XML

UDT: UDP-based data transfer protocol

congestion control algorithms. (Presentation: PPT 311kb)UDT is designed and implemented by the National Center for data mining at the University of Illinois at Chicago. currently the UDT project has released a productivity version (UDT 3.3) and a prototype of the future version (udtv4 beta ).The UDT project was supported in part by NSF, Doe, and the US Army Pantheon project.NewsJune 4, 2007UDT helped to reach 711 Mb/s (peak 844 Mb/s) disk-disk data t

Using ORACLE_FDW to access Oracle in PostgreSQL

EXTENSION oracle_fdw;CREATE SERVER oradb FOREIGN DATA WRAPPER oracle_fdw OPTIONS (dbserver ‘oratest‘);GRANTUSAGEONFOREIGN SERVER oradb TO scott; Note that "Oratest" in the above command "DBServer ' Oratest" is the tnsnames set in the preceding TNSNames. The above SQL assigns access to the Oracle external service to the user Scott, who is now logged on with the Scott User: CREATEUSER MAPPING FORcurrent_user SERVER oradb OPTIONS (user‘scott‘, password ‘tiger‘);CREATEFOREIGNTAB

Analysis of the application of data source in JDBC

database is updated immediately after the program sends an SQL instruction to the database. The following is a concrete example. In this instance, the URL used as the getconnection () method parameter is in the NET8 keyword-value pair format. Of course, you can also use the normal format. The database is installed on a server named Chicago, the protocol used is the TCP protocol, the port used is 1521, the SID of the database is CHIDB, and the databa

Learn a little design pattern every day-factory method mode

" + name); System.out.println ("tossing dough"); System.out.println ("Adding toppings"); for (int i=0;i Product specific Category public class Chicagostylecheesepizza extends Pizza {public Chicagostylecheesepizza () { name = "Chicago Style" Deep Dish Cheese Pizza "; Dough = "Extra Thick crust dough"; sauce = "Plum Tomato sauce"; Toppings.add ("shredded mozzarella Cheese"); } public void Cut () { System.out.println ("cutti

MySQL Master-slave replication

master server testmysql> CREATE database Scott;Query OK, 1 row Affected (0.00 sec)mysql> use ScottDatabase changedmysql> CREATE TABLE Dept(-Deptno INT PRIMARY KEY,Dname VARCHAR (14),Loc VARCHAR (13));Query OK, 0 rows affected (0.02 sec)mysql> INSERT into Dept VALUES(Ten, ' ACCOUNTING ', ' NEW YORK ');Query OK, 1 row affected (0.01 sec)mysql> INSERT into Dept VALUES(+, ' DALLAS ');Query OK, 1 row Affected (0.00 sec)mysql> INSERT into Dept VALUES(+, ' SALES ', '

Linux under oracle11g DG Build (II): Building operations around the main library

'*.db_block_size=8192*.db_domain= ' cuug.net ' //delete*.db_name= ' TestDB12 '*.db_recovery_file_dest= '/u01/app/oracle/fast_recovery_area '*.db_recovery_file_dest_size=4322230272*.diagnostic_dest= '/u01/app/oracle '*.dispatchers= ' (protocol=tcp) (SERVICE=TESTDB12XDB) '*.log_archive_dest_1= ' LOCATION=/DSK4/ARCH_BJ ' //delete*.log_archive_format= ' Arch_%t_%s_%r.log '*.memory_target=642006528*.open_cursors=300*.processes=150*.remote_login_passwordfile= ' EXCLUSIVE ' //Add*.undo_tablespace= ' U

Oracle Dataguard Log Transfer

, All_logfiles Database_role has the following values: Primary_role, Standby_role, All_roles REOPEN: Specifies how many seconds to retry when a connection error occurs; COMPRESSION: Specifies whether to compress the log, which improves network transport performance. Here is an example of log_archive_dest_n:Db_unique_name=bostonlog_archive_config=\ ' dg_config= (boston,chicago,hartford) \ ' log_archive_dest_2=\ ' SERVICE=

Sqlite3 Common Commands & Syntax

Clerk 7902 17-12-1980 800 207499 ALLEN salesman 7698 20-02-1981 1600 300 307521 WARD salesman 7698 22-02-1981 1250 500 30sqlite>. Mode InsertSqlite> select * FROM dept;INSERT into Table VALUES (' ACCOUNTING ', ' NEW YORK ');INSERT into Table VALUES ("DALLAS");INSERT into Table VALUES (' SALES ', ' CHICAGO ');INSERT into table VALUES (+, ' OPERATIONS ', ' BOSTON ');sqlite>. Mode LineSqlite> select * FROM dept;DEPTNO = 10Dname = ACCOUNTINGLOC = NEW YOR

Sqlite3 often use commands & syntax

| Salesman|7698|20-02-1981|1600|300|30Assuming that the field value is NULL, the default is to display an empty stringsqlite>. Mode columnSqlite> select * from EMP;7369 SMITH Clerk 7902 17-12-1980 800 207499 ALLEN salesman 7698 20-02-1981 1600 300 307521 WARD salesman 7698 22-02-1981 1250 500 30sqlite>. Mode InsertSqlite> select * FROM dept;INSERT into Table VALUES (' ACCOUNTING ', ' NEW YORK ');INSERT into Table VALUES ("DALLAS");INSERT into Table VALUES (' SALES ', '

Sqlite3 often use commands & syntax

|7698|20-02-1981|1600|300|30Assuming that the field value is NULL, the default is to display an empty stringsqlite>. Mode columnSqlite> select * from EMP;7369 SMITH Clerk 7902 17-12-1980 800 207499 ALLEN salesman 7698 20-02-1981 1600 300 307521 WARD salesman 7698 22-02-1981 1250 500 30sqlite>. Mode InsertSqlite> select * FROM dept;INSERT into Table VALUES (' ACCOUNTING ', ' NEW YORK ');INSERT into Table VALUES ("DALLAS");INSERT into Table VALUES (' SALES ', '

"Tokengazer Depth Study" Aergo: Enterprise-level public chain is not clear, the project information disclosure is not fully recommended follow-up observation

allowed to innovate and provide business services. Similar to today's cloud computing, Aergo to provide enterprise-class users with a secure, open-source framework for developing and running Dapp. When necessary, enterprise users can easily move dapp from the public chain to a more secure, higher-performing private chain. Aergo borrowed a lot of concepts from traditional databases and distributed computing.Figure 1 Interoperability of public and private chains in Aergo ecology To implement a h

RFID modulation and Encoding

RFID modulation and EncodingModulationSound is converted to electricity by a telephone and then transmitted as an analog signal.These waves has 3 fundamental characteristics: Amplitude, meaning the height (intensity) of the wave Frequency, which is the number of waves this pass in a single second and was measured in Hertz (cycles/second) (Wavelength, The length of the wave from crest to crest, was related to frequency.). Phase is a third characteristic this describes the point i

Percent signs (%) and question marks (?) in PowerShell "?"

Convert-PathAlias dbp Disable-PSBreakpointAlias del Remove-ItemAlias diff Compare-ObjectAlias dir Get-ChildItemAlias ebp Enable-PSBreakpointAlias echo Write-OutputAlias epal Export-AliasAlias epcsv Export-CsvAlias epsn Export-PSSessionAlias erase Remove-ItemAlias etsn Enter-PSSessionAlias exsn Exit-PSSessionAlias fc Format-CustomAlias fl Format-ListAlias foreach ForEach-ObjectAlias ft Format-TableAlias fw Format-WideAlias gal Get-AliasAlias gbp Get-P

ASP Advanced Tutorial: Database version of the guest book

Access Driver (*.mdb)};d bq= "amp; DBPath Because we want to open an access (. mdb) database, we want to access the database through the ODBC driver {Microsoft access Driver (*.mdb)} in Access, and the DBP parameter is used to specify the database file that you want to open. Because it must be the full path name, we used the Server.MapPath function in the previous statement. name = Left (name, 40) Tel = Left (tel,10) email = left (email, 80)

JAVA: Perspective intersection algorithm GUI implementation

Compilation Environment:Operating system: Win8.1 64-bitIDE platform: Visual Studio UltimateFirst, principle and procedureSecond, the Code implementationAngle ahead intersection. javaPackage Text;import Java.awt.*;import Java.awt.event.*;import java.math.*;import javax.swing.*;import Javax.swing.border.border;public class Angle forward Rendezvous extends jframe{ public static final int textarea_rows = 20;nbs p; public static final int textarea_columns = 40; Public Angle Forward Rendezvous () {

Relationship Between XML and databases

, the smallest independent unit in the data is the pcdata element or attribute), and few or no mixed content. The sequence of appearance of the same level elements and pcdata is not important. A typical example is that XML documents include sales orders, flight schedules, restaurant menus, and so on. Data-centric documents are often used by machines. xml may be redundant-it is only a means of data transmission. For example, the following sales order document is data-centric: ABC Industries 123 M

. Inf file hacking-hoky (hoky Security Team)

define ImagePath. If REG_SZ is used instead, there will be some problems-you cannot use environment variables. You can only use the full path. There is no such problem with the INF file. servicebinary (that is, ImagePath) automatically becomes reg_expand_sz.2. The most important thing is that, like using SC and other tools, the effect of the INF file is immediate, and the file must be restarted after the Reg is imported.3. The inf file automatically adds a security sub-key for the Registry Key

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