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
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.model.content.cluster;
import com.yahoo.vespa.model.builder.xml.dom.ModelElement;
import com.yahoo.vespa.model.content.IndexedHierarchicDistributionValidator;
import com.yahoo.vespa.model.content.Redundancy;
/**
* Builds redundancy config for a content cluster.
*
* @author bratseth
*/
public class RedundancyBuilder {
// Per group on hosted, global otherwise
private Integer initialRedundancy = null;
private Integer finalRedundancy = null;
private Integer readyCopies = null;
// Always global (across groups)
private Integer globalMinRedundancy = null;
public RedundancyBuilder(ModelElement clusterXml) {
ModelElement redundancyElement = clusterXml.child("redundancy");
if (redundancyElement != null) {
initialRedundancy = redundancyElement.integerAttribute("reply-after");
finalRedundancy = (int) redundancyElement.asLong();
if (initialRedundancy == null) {
initialRedundancy = finalRedundancy;
} else {
if (finalRedundancy < initialRedundancy) {
throw new IllegalArgumentException("Final redundancy must be higher than or equal to initial redundancy");
}
}
readyCopies = clusterXml.childAsInteger("engine.proton.searchable-copies");
if (readyCopies != null && readyCopies > finalRedundancy)
throw new IllegalArgumentException("Number of searchable copies can not be higher than final redundancy");
}
ModelElement minRedundancyElement = clusterXml.child("min-redundancy");
if (minRedundancyElement != null) {
globalMinRedundancy = (int)minRedundancyElement.asLong();
}
if (redundancyElement == null && minRedundancyElement == null)
throw new IllegalArgumentException("Either <redundancy> or <min-redundancy> must be set");
}
/**
* @param isHosted
* @param isStreaming true if this cluster only has schemas with streaming mode, false if it only has schemas
* without streaming, null if it has both
* @param subGroups
* @param leafGroups
* @param totalNodes
* @return
*/
public Redundancy build(boolean isHosted, Boolean isStreaming, int subGroups, int leafGroups, int totalNodes) {
if (isHosted) {
if (globalMinRedundancy != null && ( finalRedundancy == null || finalRedundancy * leafGroups < globalMinRedundancy ))
initialRedundancy = finalRedundancy = (int)Math.ceil((double)globalMinRedundancy / leafGroups);
if (readyCopies == null) {
if (isStreaming == Boolean.TRUE) {
readyCopies = finalRedundancy;
}
else { // If isStreaming is null (mixed mode cluster) there are no good options ...
if (leafGroups > 1)
readyCopies = 1;
else
readyCopies = finalRedundancy > 1 ? 2 : 1;
}
}
return new Redundancy(initialRedundancy, finalRedundancy, readyCopies, leafGroups, totalNodes);
} else {
if (globalMinRedundancy != null && ( finalRedundancy == null || finalRedundancy < globalMinRedundancy))
initialRedundancy = finalRedundancy = globalMinRedundancy;
if (readyCopies == null) {
if (isStreaming == Boolean.TRUE)
readyCopies = finalRedundancy;
else // If isStreaming is null (mixed mode cluster) there are no good options ...
readyCopies = finalRedundancy > 1 ? Math.max(subGroups, 2) : 1;
}
subGroups = Math.max(1, subGroups);
IndexedHierarchicDistributionValidator.validateThatLeafGroupsCountIsAFactorOfRedundancy(finalRedundancy, subGroups);
IndexedHierarchicDistributionValidator.validateThatReadyCopiesIsCompatibleWithRedundancy(finalRedundancy, readyCopies, subGroups);
if (initialRedundancy == null)
initialRedundancy = finalRedundancy;
return new Redundancy(initialRedundancy/subGroups, finalRedundancy/subGroups,
readyCopies/subGroups, subGroups, totalNodes);
}
}
}
|
