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
| column | type | references | description |
|---|---|---|---|
filespace_oid |
oid | pg_filespace.oid | object id of the filespace |
db_id |
smallint | primary segment id | |
location |
text | primary filesystem location | |
persistent_state |
smallint | 0 - free
1 - create pending 2 - created 3 - drop pending 4 - aborting create 5 - “Just in Time” create pending 6 - bulk load create pending |
|
reserved |
integer | Not used. Reserved for future use. | |
parent_xid |
integer | Global transaction id. | |
persistent_serial_num |
bigint | Log sequence number position in the transaction log for a file block. | |
previous_free_tid |
tid | Used by HAWQ to internally manage persistent representations of file system objects. |