By setting the following values in init.ora file.
LOG_ARCHIVE_FORMAT = arch %S/s/T/tarc (%S - Log sequence
number and is zero left paded, %s - Log sequence
number not padded. %T - Thread number lef-zero-paded and
%t - Thread number not padded). The file name created is
arch 0001 are if %S is used.
LOG_ARCHIVE_DEST = path.
To perform one of these function on an index,table, or cluster:
- to collect statisties about object used by the
optimizer and store them in the data dictionary.
- to delete statistics about the object used by
object from the data dictionary.
- to validate the structure of the object.
- to identify migrated and chained rows of the table or
Replication of data in distributed enviroonment.
Using snapshots to replicate data.
Using remote procedure calls.
snapshot is nothing but a consistance data for master table
if any chance the master table snapshot is fatch the
updated data for master table.
snapshots is three types of complite,fast and force.
A simple snapshot is based on a query that does not
contains GROUP BY clauses, CONNECT BY clauses, JOINs,
sub-query or snashot of operations.
- A complex snapshots contain atleast any one of the above.
Dynamic data replication is feture of oracle actualy the to
more database ex:- this is production database and other
database with and synconoze with the production databse
throuth the dynamic replication. if any change the proction
database the symaltantinasly change the other database the
replication. the benefite the the user can access any were
ether prodction or syn with other database.
Time the references to occur when master tables are not in use.
Peform the reference the manually immdiately locking the
master tables. We can join tables in snopshots by creating
a complex snapshots that will based on the master tables.
COMPLETE - Tables are completly regenerated using
the snapshot's query and the master tables every time the
FAST - If simple snapshot used then a snapshot log can be
used to send the changes to the snapshot tables.
FORCE - Default value. If possible it performs a FAST
refresh; Otherwise it will perform a complete refresh.