anchor.diff:  
   If you are using PXF in your current Greenplum Database 6.x installation, you must perform some PXF upgrade actions when you upgrade to a newer version of Greenplum Database 6.x. This procedure uses *PXF.from* to refer to your currently-installed PXF version.
   
  -**Note**: if you are planning to upgrade a PXF `rpm` or `deb` installation, refer to the [PXF upgrade documentation](../../pxf/latest/upgrade_pxf_rpm.html).
  +**Note**: if you are planning to upgrade a PXF `rpm` or `deb` installation, refer to the [PXF upgrade documentation](../../pxf/latest/using/upgrade_landing.html).
   
   The PXF upgrade procedure has two parts. You perform one procedure before, and one procedure after, you upgrade to a new version of Greenplum Database:
   
  
positive.code:         gpadmin@gpmaster pxf cluster register
          ```
  
      2. Start PXF on each segment host as described in [Starting PXF](../../pxf/latest/cfginitstart_pxf.html#start_pxf).
  
      3. Skip the following steps and exit this procedure.
  
  1. Starting in Greenplum Database version 6.19.0, PXF is removed from the Greenplum Server distribution. You must download and install the standalone PXF `rpm` or `deb` package as described in [Installing PXF](../../pxf/latest/installing_pxf.html). **Install the same PXF 5.x version as *PXF.from*.**
  
  2. Initialize PXF on each segment host as described in [Initializing PXF](../../pxf/5-15/init_pxf.html). You may choose to use your existing `$PXF_CONF` for the initialization.
  
  
negative.code:     gpadmin@gpmaster$ $GPHOME/pxf/bin/pxf cluster start
      ```
  
  Your Greenplum Database cluster is now running the same version of PXF, but running it from the PXF installation directory (`/usr/local/pxf-gp<greenplum-major-version>`). Should you wish to upgrade PXF in the future, consult the [PXF upgrade documentation](../../pxf/latest/using/upgrade_landing.html).
  
  