Gbase 8C backup control function (I)

The backup control function can help with online backup .

pg_create_restore_point(name text)

describe ： Create a named point for performing recovery .（ Administrator role is required ）

return type ：text

remarks ：pg_create_restore_point Created one that can be used for recovery purposes 、 There are named transaction log records , And return to the corresponding transaction log location . In the process of recovery ,recovery_target_name You can use this name to locate the corresponding log recovery point , And start the recovery operation from here . Avoid creating multiple recovery points with the same name , Because the recovery operation will match in the first （ Recovery objectives ） Stop on the name .

pg_current_xlog_location()

describe ： Get the write location of the current transaction log .

return type ：text

remarks ：pg_current_xlog_location Use the same format as the previous functions to display the write location of the current transaction log . If it's a read-only operation , No system administrator privileges are required .

pg_current_xlog_insert_location()

describe ： Get the insertion location of the current transaction log .

return type ：text

remarks ：pg_current_xlog_insert_location Displays the insertion location of the current transaction log . The insertion point is the transaction log at a moment “ Logical end point ”, The actual write location is the end point of writing from the internal buffer of the server . The write location is the endpoint that can be detected from outside the server , If you want to archive a partially completed transaction log file , Then this operation can be realized . The insertion point is mainly used for server debugging purposes . If it's a read-only operation , No system administrator privileges are required .

gs_current_xlog_insert_end_location()

describe ： Get the insertion location of the current transaction log .

return type ：text

remarks ：gs_current_xlog_insert_end_location Displays the actual insertion location of the current transaction log .