• Home
  • Services
    • DBA Support
    • DBA Consultancy Services
    • PostgreSQL Support
    • Website Maintenance
  • Courses

    About Courses

    • List Of Courses
    • Become an Instructor
    Greenplum Database

    Greenplum Database

    $2,000.00 $1,500.00
    Read More
  • Company
    • FAQs
    • About Us
    • Contact
  • Events
  • Portfolio
  • Blogs
    • Blog – RayaFeeL
    • Blog – PostgreSQL Support
    • Blog – PostgreSQL Migration
    • Blog – All DB’s
    • Blog – Linux
    • Blog – Medical Coding
      • Cart

        0

    Have any question?
    (+91)8838953252
    ITsupport@rayafeel.com
    RegisterLogin
    RayaFeeL
    • Home
    • Services
      • DBA Support
      • DBA Consultancy Services
      • PostgreSQL Support
      • Website Maintenance
    • Courses

      About Courses

      • List Of Courses
      • Become an Instructor
      Greenplum Database

      Greenplum Database

      $2,000.00 $1,500.00
      Read More
    • Company
      • FAQs
      • About Us
      • Contact
    • Events
    • Portfolio
    • Blogs
      • Blog – RayaFeeL
      • Blog – PostgreSQL Support
      • Blog – PostgreSQL Migration
      • Blog – All DB’s
      • Blog – Linux
      • Blog – Medical Coding
        • Cart

          0

      Blog

      • Home
      • Blog
      • Blog
      • Greenplum Segment Recovery

      Greenplum Segment Recovery

      • Posted by 2ndnijam
      • Categories Blog
      • Date December 23, 2018
      • Comments 0 comment

      The gprecoverseg utility prepares the segments for recovery and then exits, allowing the Greenplum file replication processes to copy data from the primary to the mirror.

      During the gprecoverseg execution the following recovery process steps are completed.

      1. The down segments are identified.
      2. The mirror segment processes are initialized.
      3. For full recovery (-aF):
        • The data directories of the down segments are deleted.
        • A new data directory structure is created.
      4. The segment mode in the gp_segment_configuration system table is updated to ‘r’ (resynchronization mode).
      5. The backend performs the following:
        • Suspends IO—connections to the master are allowed, but reads and writes from the segment being recovered are not allowed.
        • Scans persistent tables on the primary segment.
        • For each persistent file object (relfilenode in the pg_class system table), creates a data file on the mirror.
        The greater the number of data files, the longer IO is suspended.For incremental recovery, the IO is suspended for a shorter period because only file system objects added (or dropped) on the primary after the mirror was marked down need to be created (or deleted) on the mirror.
      6. The gprecoverseg script completes.

      Once gprecoverseg has completed, the segments are in the states shown in the following table.

      preferred_rolerolemodestatus
      Primaryp(primary)p(primary)r(resynchronizing)u(up)
      Mirrorm(mirror)m(mirror)r(resynchronizing)u(up)

      • Share:
      2ndnijam

      Previous post

      How to recover The greenplum segments ?
      December 23, 2018

      Next post

      Greenplum Architecture
      December 23, 2018

      Leave A Reply Cancel reply

      You must be logged in to post a comment.

      Login with:

      Login with Google Login with Twitter Login with LinkedIn Login with Microsoft


      Search

      ADVERTISEMENT

      Latest Posts

      PostgreSQL Patching version 9, 10,11
      10Oct2019
      Tools for PostgreSQL
      16Sep2019
      Postgres user creation and restrict DDL & database access
      13Sep2019
      PostgreSQL SSL Setup
      07Sep2019
      How to DELETE current XLOG / WAL LOG in postgresql database ?
      19Aug2019

      Latest Courses

      PostgreSQL Database

      PostgreSQL Database

      $600.00 $500.00
      Greenplum Database

      Greenplum Database

      $2,000.00 $1,500.00

      Preview Course

      Free

      Recent Forum Topics

      • thought behind whiteboard activity
      • Are you going to take your first ste
      • How to start working on an application?
      • please let me know pre requirements to increase work_mem
      • how to copy some data in one table to another table in postgres

      2ndquadrant.in

      (+91) 8838953252

      ITsupport@rayafeel.com

      Company

      • About Us
      • Contact
      • Our Team
      • Blog

      COURSES

      • List Of Course
      • Become An Instructor
      • Events
      • Postgres Support Blog

      Support

      • DBA Support
      • Consultancy Services
      • Postgres Migration Blogs
      • Forum

      Recommend

      • Groups
      • Login
      • FAQs
      • SignUp

      IT Services by rayafeel.com. Powered by Rayafeel Technologies Pvt Ltd.

      • Privacy
      • Terms

      Become An Instructor?

      Join thousand of instructors and earn money hassle free!

      Get Started Now

      Login with:

      Login with Google Login with Twitter Login with LinkedIn Login with Microsoft

      Login with your site account

      Lost your password?

      Not a member yet? Register now

      Register a new account

      Are you a member? Login now