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Top Forums UNIX for Beginners Questions & Answers File Management: Removing of files from Server2 IF the same file is removed from Server1. Post 303041921 by Raza Ali on Saturday 7th of December 2019 06:15:07 AM
Old 12-07-2019
Hi RudiC,

Thank you for reverting.

Pls show how and where "SERVER-B ... will delete same".: either delete OR move to another directory.

Will all files 1 - 4 be deleted from server1 if all went well?: YES

Will they also be deleted from server2 if all went well?: YES, this is what we want to avoid duplicity(if SERVER1 goes DWON, SERVER-B will be pointed to SERVER2 and it should pick only those files which are not picked from SERVER1).

Does server-B have a list of files to copy? A list of files done and to be deleted?: NO - SERVER-B knows a directory on SERVER1 from where it will pick files and either delete it or ARCHIVE it to another directory.

SERVER-A(In fact it combination of 6 SERVERs - but not relevant to us) is generating lots of files, these files are pulled by SERVER1 and SERVER2 separately.

SERVER1 and SERVER2 are at two sites for redundancy.

SERVER-B picks files from SERVER1 and IF SERVER1 goes down it should pick files from SERVER2(but it should not pick the files already picked from SERVER1 - To avoid duplicity).

SERVER-B is another party - I need to check with them, Still please provide suggestion based on your assumption(It will delete or move to another directory).

Thank you.
 

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CREATE 
SERVER(7) PostgreSQL 9.2.7 Documentation CREATE SERVER(7) NAME
CREATE_SERVER - define a new foreign server SYNOPSIS
CREATE SERVER server_name [ TYPE 'server_type' ] [ VERSION 'server_version' ] FOREIGN DATA WRAPPER fdw_name [ OPTIONS ( option 'value' [, ... ] ) ] DESCRIPTION
CREATE SERVER defines a new foreign server. The user who defines the server becomes its owner. A foreign server typically encapsulates connection information that a foreign-data wrapper uses to access an external data resource. Additional user-specific connection information may be specified by means of user mappings. The server name must be unique within the database. Creating a server requires USAGE privilege on the foreign-data wrapper being used. PARAMETERS
server_name The name of the foreign server to be created. server_type Optional server type. server_version Optional server version. fdw_name The name of the foreign-data wrapper that manages the server. OPTIONS ( option 'value' [, ... ] ) This clause specifies the options for the server. The options typically define the connection details of the server, but the actual names and values are dependent on the server's foreign-data wrapper. NOTES
When using the dblink module (see dblink), the foreign server name can be used as an argument of the dblink_connect(3) function to indicate the connection parameters. See also there for more examples. It is necessary to have the USAGE privilege on the foreign server to be able to use it in this way. EXAMPLES
Create a server foo that uses the built-in foreign-data wrapper default: CREATE SERVER foo FOREIGN DATA WRAPPER "default"; Create a server myserver that uses the foreign-data wrapper pgsql: CREATE SERVER myserver FOREIGN DATA WRAPPER pgsql OPTIONS (host 'foo', dbname 'foodb', port '5432'); COMPATIBILITY
CREATE SERVER conforms to ISO/IEC 9075-9 (SQL/MED). SEE ALSO
ALTER SERVER (ALTER_SERVER(7)), DROP SERVER (DROP_SERVER(7)), CREATE FOREIGN DATA WRAPPER (CREATE_FOREIGN_DATA_WRAPPER(7)), CREATE USER MAPPING (CREATE_USER_MAPPING(7)) PostgreSQL 9.2.7 2014-02-17 CREATE SERVER(7)
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