Lexmark X925 Lexmark Document Distributor - Page 30

Using multiple systems for high availability

Page 30 highlights

Installing Lexmark Document Distributor 30 Configuration Description Advantages X‑Y‑N Database (DB) on X computers in a Microsoft Cluster Server for High failover, load balancer (LB) on Y other computers in a Microsoft Cluster availability, Server for failover, server on one or more additional computers further improved LB performance (cluster) Server(s) Disadvantages Further increased hardware needs, cluster licensing DB (cluster) Note: An external Oracle database may be installed in place of the standard database, resulting in an E-Y-N configuration. The external database (E) on X computers and the load balancer (LB) on Y other computers in a Microsoft Cluster Server for failover. The server is on one or more additional computers. Using multiple systems for high availability When configuring multiple LDD systems, you can connect them to a hardware load balancer or Global Site Selector (GSS) to provide high availability, without using clustering, as well as increased capacity. Hardware load balancer A1 Load balancers/ databases A2 A3 Servers T1 T2 T3 T4 T5 T6 Configuration 1-N LDD system Configuration 1-N LDD system Configuration 1-N LDD system Each system group contains two identical LDD systems. Jobs are balanced between these systems in each group by the hardware load balancer or GSS. If a failure occurs in one system in a group, then the other system in the group receives all incoming jobs until the failed system can be restored.

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Configuration
Description
Advantages
Disadvantages
X
Y
N
Database (DB) on X computers in a Microsoft Cluster Server for
failover, load balancer (LB) on Y other computers in a Microsoft Cluster
Server for failover, server on one or more additional computers
Server(s)
LB
(cluster)
DB
(cluster)
Note:
An external Oracle database may be installed in place of the
standard database, resulting in an E-Y-N configuration. The external
database (E) on X computers and the load balancer (LB) on Y other
computers in a Microsoft Cluster Server for failover. The server is on
one or more additional computers.
High
availability,
further
improved
performance
Further increased
hardware needs,
cluster licensing
Using multiple systems for high availability
When configuring multiple LDD systems, you can connect them to a hardware load balancer or Global Site Selector
(GSS) to provide high availability, without using clustering, as well as increased capacity.
Load
balancers/
databases
Hardware load balancer
Servers
A1
A2
A3
T1
T2
T3
T4
T5
T6
Configuration 1-N
LDD system
Configuration 1-N
LDD system
Configuration 1-N
LDD system
Each system group contains two identical LDD systems. Jobs are balanced between these systems in each group by the
hardware load balancer or GSS. If a failure occurs in one system in a group, then the other system in the group receives
all incoming jobs until the failed system can be restored.
Installing Lexmark Document Distributor
30