DS1-Project/src/main/java/it/unitn/ds1/SystemConstants.java at master · andr35/DS1-Project · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
package it.unitn.ds1;

/**
 * Contains common settings for both the Node and the Client.
 */
public final class SystemConstants {

	/**
	 * Unique name for the Akka application.
	 * Used by Akka to contact the other Nodes of the system.
	 */
	public static final String SYSTEM_NAME = "dsproject";

	/**
	 * Unique name for the Akka Node Actor.
	 * Used by Akka to contact the other Nodes of the system.
	 */
	public static final String ACTOR_NAME = "node";


	/**
	 * Timeout that a client waits before giving up
	 * when requesting something to a node.
	 */
	public static final int CLIENT_TIMEOUT_SECONDS = 10;

	/**
	 * Timeout that internal nodes wait before replying to
	 * the client that an operation failed.
	 */
	public static final int QUORUM_TIMEOUT_SECONDS = 3;


	/**
	 * Replication factor. Each key will be replicated on N nodes.
	 */
	static final int REPLICATION = 3;

	/**
	 * Read quorum: in order to get a ket, the coordinator must
	 * contact at least this number of nodes.
	 */
	static final int READ_QUORUM = 2;

	/**
	 * Write quorum: in order to update a key, the coordinator must
	 * contact at lead this number of nodes.
	 */
	static final int WRITE_QUORUM = 2;
}