MySQL Replication Overview

Replication is a feature allowing the contents of one or more servers (called masters) to be mirrored on one or more servers (called slaves)
You can setup the replication at following levels
All databases
One or more databases
Tables within a database

Since replication is using binary log to replicate the transactions, it is mandatory requirement to have the database in binary logging mode setup replication.

How MySQL Master/Slave Replication Works

1> MySQL master server writes the changes in bnary log in a sequential manner
2> I/O thread of slave MySQL then pulls these changes from Master over the network and writes them in relay log.
3> SQL Thread of slave MySQL then replicates these changes to slave database.

The slave server keeps track of the position in the master's binlog of the last event applied on the slave. This allows the slave server to re-connect and resume from where it left off after replication has been temporarily stopped.

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How to Power On/off Oracle Exadata Machine

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ORA-28374: typed master key not found in wallet

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ORA-65104: operation not allowed on an inactive pluggable database alter pluggable database open

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Starting RMAN and connecting to Database

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How to Attach to a Datapump Job and Check Status of Export or Import

<<Back to Oracle DATAPUMP Main Page How to check the progress of export or import Jobs You can attach to the export/import job using ATTACH parameter of oracle datapump utility. Once you are attached to the job you check its status by typing STATUS command. Let us see how Step1> Find the Export/Import Job Name You can find the datapump job information from DBA_DATAPUMP_JOBS or USER_DATAPUMP_JOBS view. SQL> SELECT OWNER_NAME,JOB_NAME,OPERATION,JOB_MODE,STATE from DBA_DATAPUMP_JOBS; OWNER_NAME JOB_NAME OPERATION JOB_MODE STATE ---------- ------------------------------ -------------------- ---------- ---------- SYSTEM SYS_EXPORT_FULL_02 EXPORT FULL EXECUTING OR You can also find the job name for export/import in logfile in beginning itself. Step2>Attach to the Job and check status One you get the Export/Import Job Name attach the job and check its status. You can attach or det

Step by Step how to Create Virtual Machine using Virtualbox

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