One of many replication, or I can do this?

Hello

I have two 6510e on the campus. One of them is the main (in our main data center) and the other in our data center for backup (also on campus) and is just there to replicate to. It's a fairly simple setup and it works beautifully. Now the key: it works so well that people are starting to ask whether there is a way to have a third unit (perhaps a PS6610E, not sure yet) sitting in our disaster recovery site and replicate the secondary unit.

Thank you!

Hello

No sorry.  A volume can be replicated only to one partner, and you can not re - duplicate a replica.   I've heard of customers using scripts for promote/clone a replica to a host side DR to backup to tape, or software to replicate to another use host-based storage.

Kind regards

Don

Tags: Dell Products

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    SCOTT@orcl_11gR2> -- tables and data that you provided:
    SCOTT@orcl_11gR2> CREATE TABLE SUBMISSION
      2  ( SUBMISSION_ID           NUMBER(10)          NOT NULL,
      3    SUBMISSION_NAME           VARCHAR2(100)          NOT NULL
      4  )
      5  /
    
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    SCOTT@orcl_11gR2> CREATE TABLE ADVISOR_TYPE
      2  ( ADVISOR_TYPE_ID           NUMBER(10)          NOT NULL,
      3    ADVISOR_TYPE_NAME      VARCHAR2(50)          NOT NULL
      4  )
      5  /
    
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    SCOTT@orcl_11gR2> CREATE TABLE SUBMISSION_ADVISORS
      2  ( SUBMISSION_ADVISORS_ID      NUMBER(10)          NOT NULL,
      3    SUBMISSION_ID           NUMBER(10)          NOT NULL,
      4    ADVISOR_TYPE_ID           NUMBER(10)          NOT NULL,
      5    FIRST_NAME           VARCHAR(50)          NULL,
      6    LAST_NAME           VARCHAR(50)          NULL,
      7    SUFFIX                VARCHAR(20)          NULL
      8  )
      9  /
    
    Table created.
    
    SCOTT@orcl_11gR2> INSERT ALL
      2  INTO SUBMISSION (SUBMISSION_ID, SUBMISSION_NAME)
      3    VALUES (1, 'Some Research Paper')
      4  INTO SUBMISSION (SUBMISSION_ID, SUBMISSION_NAME)
      5    VALUES (2, 'Thesis on 17th Century Weather Patterns')
      6  INTO SUBMISSION (SUBMISSION_ID, SUBMISSION_NAME)
      7    VALUES (3, 'Statistical Analysis on Sunny Days in March')
      8  SELECT * FROM DUAL
      9  /
    
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    SCOTT@orcl_11gR2> INSERT ALL
      2  INTO ADVISOR_TYPE (ADVISOR_TYPE_ID, ADVISOR_TYPE_NAME)
      3    VALUES (1, 'Department Chair')
      4  INTO ADVISOR_TYPE (ADVISOR_TYPE_ID, ADVISOR_TYPE_NAME)
      5    VALUES (2, 'Department Co-Chair')
      6  INTO ADVISOR_TYPE (ADVISOR_TYPE_ID, ADVISOR_TYPE_NAME)
      7    VALUES (3, 'Professor')
      8  INTO ADVISOR_TYPE (ADVISOR_TYPE_ID, ADVISOR_TYPE_NAME)
      9    VALUES (4, 'Associate Professor')
     10  INTO ADVISOR_TYPE (ADVISOR_TYPE_ID, ADVISOR_TYPE_NAME)
     11    VALUES (5, 'Scientist')
     12  SELECT * FROM DUAL
     13  /
    
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      2  INTO SUBMISSION_ADVISORS (SUBMISSION_ADVISORS_ID, SUBMISSION_ID, ADVISOR_TYPE_ID, FIRST_NAME, LAST_NAME, SUFFIX)
      3    VALUES (1,1,2,'John', 'Doe', 'PhD')
      4  INTO SUBMISSION_ADVISORS (SUBMISSION_ADVISORS_ID, SUBMISSION_ID, ADVISOR_TYPE_ID, FIRST_NAME, LAST_NAME, SUFFIX)
      5    VALUES (2,1,2,'Jane', 'Doe', 'PhD')
      6  INTO SUBMISSION_ADVISORS (SUBMISSION_ADVISORS_ID, SUBMISSION_ID, ADVISOR_TYPE_ID, FIRST_NAME, LAST_NAME, SUFFIX)
      7    VALUES (3,2,3,'Johan', 'Smith', NULL)
      8  INTO SUBMISSION_ADVISORS (SUBMISSION_ADVISORS_ID, SUBMISSION_ID, ADVISOR_TYPE_ID, FIRST_NAME, LAST_NAME, SUFFIX)
      9    VALUES (4,2,4,'Magnus', 'Jackson', 'MS')
     10  INTO SUBMISSION_ADVISORS (SUBMISSION_ADVISORS_ID, SUBMISSION_ID, ADVISOR_TYPE_ID, FIRST_NAME, LAST_NAME, SUFFIX)
     11    VALUES (5,3,5,'Williard', 'Forsberg', 'AMS')
     12  SELECT * FROM DUAL
     13  /
    
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    SCOTT@orcl_11gR2> ALTER TABLE submission ADD CONSTRAINT submission_id_pk
      2    PRIMARY KEY (submission_id)
      3  /
    
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    SCOTT@orcl_11gR2> ALTER TABLE advisor_type ADD CONSTRAINT advisor_type_id_pk
      2    PRIMARY KEY (advisor_type_id)
      3  /
    
    Table altered.
    
    SCOTT@orcl_11gR2> ALTER TABLE submission_advisors ADD CONSTRAINT submission_advisors_id_pk
      2    PRIMARY KEY (submission_advisors_id)
      3  /
    
    Table altered.
    
    SCOTT@orcl_11gR2> ALTER TABLE submission_advisors ADD CONSTRAINT submission_id_fk
      2    FOREIGN KEY (submission_id) REFERENCES submission (submission_id)
      3  /
    
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    SCOTT@orcl_11gR2> ALTER TABLE submission_advisors ADD CONSTRAINT advisor_type_id_fk
      2    FOREIGN KEY (advisor_type_id) REFERENCES advisor_type (advisor_type_id)
      3  /
    
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      2           a.advisor_type_name || ' ' ||
      3           sa.first_name || ' ' ||
      4           sa.last_name || ' ' ||
      5           sa.suffix AS advisor
      6  FROM   submission_advisors sa,
      7           submission s,
      8           advisor_type a
      9  WHERE  sa.advisor_type_id = a.advisor_type_id
     10  AND    sa.submission_id = s.submission_id
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    SUBMISSION_NAME                               ADVISOR
    --------------------------------------------- ----------------------------------------
    Some Research Paper                           Department Co-Chair John Doe PhD
    Some Research Paper                           Department Co-Chair Jane Doe PhD
    Thesis on 17th Century Weather Patterns       Professor Johan Smith
    Thesis on 17th Century Weather Patterns       Associate Professor Magnus Jackson MS
    Statistical Analysis on Sunny Days in March   Scientist Williard Forsberg AMS
    
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    SCOTT@orcl_11gR2> -- procedure to create virtual documents:
    SCOTT@orcl_11gR2> CREATE OR REPLACE PROCEDURE submission_advisors_proc
      2    (p_rowid IN           ROWID,
      3       p_clob     IN OUT NOCOPY CLOB)
      4  AS
      5  BEGIN
      6    FOR r1 IN
      7        (SELECT *
      8         FROM      submission_advisors
      9         WHERE  ROWID = p_rowid)
     10    LOOP
     11        IF r1.first_name IS NOT NULL THEN
     12          DBMS_LOB.WRITEAPPEND (p_clob, 12, '');
     13          DBMS_LOB.WRITEAPPEND (p_clob, LENGTH (r1.first_name), r1.first_name);
     14          DBMS_LOB.WRITEAPPEND (p_clob, 13, '');
     15        END IF;
     16        IF r1.last_name IS NOT NULL THEN
     17          DBMS_LOB.WRITEAPPEND (p_clob, 11, '');
     18          DBMS_LOB.WRITEAPPEND (p_clob, LENGTH (r1.last_name), r1.last_name);
     19          DBMS_LOB.WRITEAPPEND (p_clob, 12, '');
     20        END IF;
     21        IF r1.suffix IS NOT NULL THEN
     22          DBMS_LOB.WRITEAPPEND (p_clob, 8, '');
     23          DBMS_LOB.WRITEAPPEND (p_clob, LENGTH (r1.suffix), r1.suffix);
     24          DBMS_LOB.WRITEAPPEND (p_clob, 9, '');
     25        END IF;
     26        FOR r2 IN
     27          (SELECT *
     28           FROM   submission
     29           WHERE  submission_id = r1.submission_id)
     30        LOOP
     31          DBMS_LOB.WRITEAPPEND (p_clob, 17, '');
     32          DBMS_LOB.WRITEAPPEND (p_clob, LENGTH (r2.submission_name), r2.submission_name);
     33          DBMS_LOB.WRITEAPPEND (p_clob, 18, '');
     34        END LOOP;
     35        FOR r3 IN
     36          (SELECT *
     37           FROM   advisor_type
     38           WHERE  advisor_type_id = r1.advisor_type_id)
     39        LOOP
     40          DBMS_LOB.WRITEAPPEND (p_clob, 19, '');
     41          DBMS_LOB.WRITEAPPEND (p_clob, LENGTH (r3.advisor_type_name), r3.advisor_type_name);
     42          DBMS_LOB.WRITEAPPEND (p_clob, 20, '');
     43        END LOOP;
     44    END LOOP;
     45  END submission_advisors_proc;
     46  /
    
    Procedure created.
    
    SCOTT@orcl_11gR2> SHOW ERRORS
    No errors.
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    SCOTT@orcl_11gR2> DECLARE
      2    v_clob  CLOB := EMPTY_CLOB();
      3  BEGIN
      4    FOR r IN
      5        (SELECT ROWID rid FROM submission_advisors)
      6    LOOP
      7        DBMS_LOB.CREATETEMPORARY (v_clob, TRUE);
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     10        DBMS_LOB.FREETEMPORARY (v_clob);
     11    END LOOP;
     12  END;
     13  /
    JohnDoePhDSome
    Research PaperDepartment Co-Chair
    JaneDoePhDSome
    Research PaperDepartment Co-Chair
    JohanSmithThesis on 17th Century
    Weather PatternsProfessor
    MagnusJacksonMSThe
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    Professor
    WilliardForsbergAMS
    

    Statistical Analysis on Sunny Days in

    MarchScientist
    
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      2    CTX_DDL.CREATE_PREFERENCE ('sa_datastore', 'USER_DATASTORE');
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    PL/SQL procedure successfully completed.
    
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    AMS
    ANALYSIS
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    CHAIR
    CO
    DAYS
    DEPARTMENT
    DOE
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    JOHAN
    JOHN
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    PATTERNS
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    PROFESSOR
    RESEARCH
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    SMITH
    STATISTICAL
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    SUFFIX
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    THESIS
    WEATHER
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      3           sa.first_name || ' ' ||
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    Thesis on 17th Century Weather Patterns       Professor Johan Smith
    Thesis on 17th Century Weather Patterns       Associate Professor Magnus Jackson MS
    
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    Some Research Paper                           Department Co-Chair Jane Doe PhD
    
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    Some Research Paper                           Department Co-Chair Jane Doe PhD
    
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      2           a.advisor_type_name || ' ' ||
      3           sa.first_name || ' ' ||
      4           sa.last_name || ' ' ||
      5           sa.suffix AS advisor
      6  FROM   submission_advisors sa,
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      8           advisor_type a
      9  WHERE  CONTAINS (sa.any_column, :search_string || ' WITHIN advisor_type_name') > 0
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     11  AND    sa.submission_id = s.submission_id
     12  /
    
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    Some Research Paper                           Department Co-Chair Jane Doe PhD
    
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      3           sa.first_name || ' ' ||
      4           sa.last_name || ' ' ||
      5           sa.suffix AS advisor
      6  FROM   submission_advisors sa,
      7           submission s,
      8           advisor_type a
      9  WHERE  CONTAINS (sa.any_column, :search_string || ' WITHIN suffix') > 0
     10  AND    sa.advisor_type_id = a.advisor_type_id
     11  AND    sa.submission_id = s.submission_id
     12  /
    
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    Some Research Paper                           Department Co-Chair Jane Doe PhD
    
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      3           sa.first_name || ' ' ||
      4           sa.last_name || ' ' ||
      5           sa.suffix AS advisor
      6  FROM   submission_advisors sa,
      7           submission s,
      8           advisor_type a
      9  WHERE  CONTAINS (sa.any_column, :search_string || ' WITHIN submission_name') > 0
     10  AND    sa.advisor_type_id = a.advisor_type_id
     11  AND    sa.submission_id = s.submission_id
     12  /
    
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    Thesis on 17th Century Weather Patterns       Professor Johan Smith
    Thesis on 17th Century Weather Patterns       Associate Professor Magnus Jackson MS
    
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    ( book_id NUMBER        PRIMARY KEY
    , title   VARCHAR2(200)
    );
    
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    ( author_id NUMBER NOT NULL REFERENCES authors(author_id)
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