User Guide

Practical Theory: Understanding Polling, Extraction and Backup
9-4
The following table summarizes polling, extraction and backup for Central, Local, and
Service computer types running Access and SQL databases.
Computer
Type
1
and
Database
Connected
Via
Backup Auto Polling Auto Extraction
2
Central
Access
Modem Midnight
(12:00AM)
Midnight
(12:00AM)
Copies the status; copies then deletes data.
Concurrent with autopoll.
Central
Access
RS-232 Midnight
(12:00AM)
Continuous Copies the status; copies then deletes data.
Concurrent with first autopoll after 12AM.
Central
Access
LAN Midnight
(12:00AM)
Continuous Copies the status; copies then deletes data.
Concurrent with first autopoll after 12AM.
Central
SQL
Modem Not available
using BMDM
Midnight
(12:00AM)
Copies the status; copies then deletes data.
Concurrent with autopoll.
Central
SQL
RS-232 Not available
using BMDM
Continuous Copies the status; copies then deletes data.
Concurrent with first autopoll after 12AM.
Central
SQL
LAN Not available
using BMDM
Continuous Copies the status; copies then deletes data.
Concurrent with first autopoll after 12AM.
Local
Access
Modem Midnight
(12:00AM)
10:00PM Copies the status; copies data. Concurrent
with autopoll.
Local
Access
RS-232 Midnight
(12:00AM)
Continuous Copies the status; copies data. Concurrent
with first autopoll after 10PM.
Local
Access
LAN Midnight
(12:00AM)
Continuous Copies the status; copies data. Concurrent
with first autopoll after 10PM.
Local
SQL
Modem Not available
using BMDM
Random between
9:30PM to 11:30PM
Copies the status; copies data. Concurrent
with random autopoll.
Local
SQL
RS-232 Not available
using BMDM
Continuous Copies the status; copies data. Concurrent
with first autopoll after 10PM.
Local
SQL
LAN Not available
using BMDM
Continuous Copies the status; copies data. Concurrent
with first autopoll after 10PM.
Service
Access
(
See Note 1)
Modem Midnight
(12:00AM)
Autopolling
not available
(Manual only)
Auto extraction not available.
(Manual only)
Service
Access
(
See Note 1)
RS-232 Midnight
(12:00AM)
Continuous Auto extraction not available.
(Manual only)
Service
Access
(
See Note 1)
LAN Midnight
(12:00AM)
Continuous Auto extraction not available.
(Manual only)
Service
SQL
(
See Note 1)
Modem Not available
using BMDM
Autopolling
not available
(Manual only)
Auto extraction not available.
(Manual only)
Service
SQL
(
See Note 1)
RS-232 Not available
using BMDM
Continuous Auto extraction not available.
(Manual only)
Service
SQL
(
See Note 1)
LAN Not available
using BMDM
Continuous Auto extraction not available.
(Manual only)
Note 1: End-user use of a computer set as Service type is not recommended.
Note 2: Status and data copy and delete functions are the same for manual extraction.
Figure 36. Computer Types: Backup, Polling and Extraction Table