7.5.3 Cluster configuration-dependent parameters
The table below lists the parameters that depend on the cluster configuration.
Bold typeface indicates a required parameter.
|
No. |
Property file |
Parameter name |
Value to be specified |
Default value |
|---|---|---|---|---|
|
1 |
Cluster property file |
IP address or host name |
None |
|
|
2 |
Port number |
None |
||
|
3 |
-2147483648 to 2147483647 |
None |
||
|
4 |
Shared property file |
IP address (multicast address) |
239.255.2.1 |
|
|
5 |
Port number |
24630 |
||
|
6 |
1 to 5 |
2 |
- Important note
-
The contents of the cluster property files and the shared property files must be identical among all the EADS servers that make up a cluster. If the properties differ, the EADS servers cannot start because the cluster cannot be configured.
If a value that is specified is outside the range of permissible values, the default value is set.
- Organization of this subsection
(1) Cluster property file
(a) eads.node.EADS-server-ID.address
This parameter specifies the IP addresses or host names (the eads.server.address parameter value in the server properties) of the EADS servers that make up the cluster.
If you specify a host name, make sure that a unique IP address can be identified from the specified host name.
EADS-server-ID is a user-assigned number (an integer from 1 through 96). The EADS server IDs are used for the store data file names to uniquely identify the individual EADS servers in the cluster. Although the EADS server IDs need not be sequential, they must be unique within the cluster.
(b) eads.node.EADS-server-ID.port
This parameter specifies the port numbers (the eads.server.port parameter value in the server properties) of the EADS servers that make up the cluster.
EADS-server-ID is a user-assigned number (an integer from 1 through 96). The EADS server IDs are used for the store data file names to uniquely identify the individual EADS servers in the cluster. Although the EADS server IDs need not be sequential, they must be unique within the cluster.
(c) eads.node.EADS-server-ID.position
This parameter specifies a location for an EADS server (hash value).
EADS-server-ID is a user-assigned number (an integer from 1 through 96). The EADS server IDs are used for the store data file names to uniquely identify the individual EADS servers in the cluster. Although the EADS server IDs need not be sequential, they must be unique within the cluster.
This parameter is optional. When this parameter is omitted, the EADS servers are distributed evenly to logical locations in the cluster.
When you use this parameter, specify locations for all EADS servers that make up the cluster. If the parameter is specified for some but not all of the EADS servers, an error occurs and EADS server startup fails.
(2) Shared property file
(a) eads.failureDetector.heartbeat.address
This parameter specifies the IP address (multicast address) used for transmitting heartbeats among the EADS servers.
You can also specify an alias of the IP address.
(b) eads.failureDetector.heartbeat.port
This parameter specifies the port number used for transmitting heartbeats among the EADS servers.
(c) eads.replication.factor
This parameter specifies the data multiplicity.
- Important note
-
The number of EADS servers that make up the cluster must be at least the data multiplicity
![[Figure]](GRAPHICS/ZUENG005.GIF)
2 - 1.
An error will result if the number of EADS servers making up the cluster is less than the data multiplicity
2 - 1, in which case startup of the EADS servers will fail.