Configuring The Number Of Allowed Sources And Replication Streams - Quantum DXi6900 Field Service Manual

Chapter 2: Service Menus

Configuring the Number of Allowed Sources and Replication Streams

Configuring the Number of Allowed Sources
and Replication Streams
The default number of replication streams used by a source system and a target system is 8. The default
number of allowed sources replicating to a target is 10 sources. If you want to increase the number of
allowed sources for a Target, you must decrease the number of replication streams on the Source system
(see Table 1 below).
Note: Replication performance is directly affected by the number of replication streams. If you
decrease the configured number of streams on the source DXi, replication performance is decreased
by a proportional amount. For example, configuring the source DXi with half the default number of
streams (that is, 4 streams) would result in approximately half the default replication performance.
Table 1: Maximum Allowed Replication Sources and Replication Streams
Maximum Number of Allowed Replication
Sources (on the Target)
Caution: If the maximum number of allowed sources is increased on the target without a
corresponding decrease in the number of replication streams used by the sources, replications and
other operations will begin to fail because the maximum number of blockpool connections will be
exceeded.
Both of the number of allowed resources and the number of replication streams are controlled by
configurable variables.
Note: To change the maximum number of allowed sources for a target, a reboot of the target system is
necessary. Similarly, to change the maximum number of replication streams that a source uses, a
reboot of each source system is necessary.
Quantum DXi6900 G2 Field Service Manual
10
11
12
15
18
20
Maximum Number of Traditional Replication
Streams (on the Source)
8
7
6
5
4
3
50