gp_persistent_filespace_node

The gp_persistent_filespace_node table keeps track of the status of file system objects in relation to the transaction status of filespace objects. This information is used to make sure the state of the system catalogs and the file system files persisted to disk are synchronized.

Table 1. pg_catalog.gp_persistent_filespace_node

columntypereferencesdescription
filespace_oidoidpg_filespace.oidobject id of the filespace
db_idsmallint primary segment id
locationtext primary filesystem location
persistent_statesmallint 0 - free

1 - create pending

2 - created

3 - drop pending

4 - aborting create

5 - “Just in Time” create pending

6 - bulk load create pending

reservedinteger Not used. Reserved for future use.
parent_xidinteger Global transaction id.
persistent_serial_numbigint Log sequence number position in the transaction log for a file block.
previous_free_tidtid Used by HAWQ to internally manage persistent representations of file system objects.