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Oracle uses a two-stage write-to-database. &nbsp;Changed rows are written into a redo log, and periodically a log segment is written to the physical storage (datafile). &nbsp;Assuming the database is running in archive log mode, the saved redo log is copied to an archive log, after which the redo log may be re-used. &nbsp;<br />
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Copies of an archive log may be written concurrently to one or more directories, on multiple hosts, for redundancy.
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Oracle uses a two-stage write-to-database.  Changed rows are written into a redo log, and periodically a log segment is written to the physical storage (datafile).  Assuming the database is running in archive log mode, the saved redo log is copied to an archive log, after which the redo log may be re-used.  

Copies of an archive log may be written concurrently to one or more directories, on multiple hosts, for redundancy.

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What is the major difference between redolog and archivelog.
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What is the major difference between redolog and archivelog.

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Oracle is an object-relational database management system. It supports a large number of languages and application development frameworks. Its primary languages are SQL, PL/SQL and Java, but it also includes support for C and C++. Oracle also has its own enterprise modules and application server software.