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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "bm_distribution.h"
#include <vespa/document/bucket/bucket.h>
#include <vespa/vespalib/stllike/asciistream.h>
#include <cassert>
using storage::lib::ClusterState;
using storage::lib::ClusterStateBundle;
using storage::lib::Node;
using storage::lib::NodeState;
using storage::lib::NodeType;
using storage::lib::State;
namespace search::bmcluster {
using DistributionConfigBuilder = BmDistribution::DistributionConfigBuilder;
namespace {
void
add_nodes_to_group(DistributionConfigBuilder::Group &group, uint32_t first_node_idx, uint32_t nodes_per_group)
{
for (uint32_t i = 0; i < nodes_per_group; ++i) {
DistributionConfigBuilder::Group::Nodes node;
node.index = first_node_idx + i;
group.nodes.push_back(std::move(node));
}
}
BmDistribution::DistributionConfig
make_distribution_config(uint32_t nodes_per_group, uint32_t groups, uint32_t redundancy)
{
DistributionConfigBuilder dc;
{
{
DistributionConfigBuilder::Group group;
group.index = "invalid";
group.name = "invalid";
group.capacity = 1.0;
if (groups == 0u) {
add_nodes_to_group(group, 0, nodes_per_group);
group.partitions = "";
dc.redundancy = redundancy;
dc.readyCopies = redundancy;
} else {
vespalib::asciistream partitions;
for (uint32_t group_idx = 0; group_idx < groups; ++group_idx) {
if (group_idx + 1< groups) {
partitions << redundancy << '|';
} else {
partitions << '*';
}
}
group.partitions = partitions.str();
dc.redundancy = redundancy * groups;
dc.readyCopies = redundancy * groups;
}
dc.group.push_back(std::move(group));
}
uint32_t node_idx = 0;
for (uint32_t group_idx = 0; group_idx < groups; ++group_idx) {
DistributionConfigBuilder::Group group;
group.index = std::to_string(group_idx);
group.name = "group_" + group.index;
group.capacity = 1.0;
group.partitions = "";
add_nodes_to_group(group, node_idx, nodes_per_group);
node_idx += nodes_per_group;
dc.group.push_back(std::move(group));
}
}
return dc;
}
ClusterState
make_cluster_state(uint32_t num_nodes)
{
vespalib::asciistream s;
s << "version:2 distributor:" << num_nodes << " storage:" << num_nodes;
return storage::lib::ClusterState(s.str());
}
}
BmDistribution::BmDistribution(uint32_t groups, uint32_t nodes_per_group, uint32_t redundancy)
: _num_nodes(std::max(1u, groups) * nodes_per_group),
_distribution_config(make_distribution_config(nodes_per_group, groups, redundancy)),
_distribution(_distribution_config),
_pending_cluster_state(make_cluster_state(_num_nodes)),
_cluster_state_bundle(_pending_cluster_state),
_has_pending_cluster_state(false)
{
}
BmDistribution::~BmDistribution()
{
}
uint32_t
BmDistribution::get_num_nodes() const
{
return _num_nodes;
}
uint32_t
BmDistribution::get_service_layer_node_idx(const document::Bucket& bucket) const
{
auto cluster_state = _cluster_state_bundle.getDerivedClusterState(bucket.getBucketSpace());
auto nodes = _distribution.getIdealStorageNodes(*cluster_state, bucket.getBucketId());
assert(!nodes.empty());
return nodes[0];
}
uint32_t
BmDistribution::get_distributor_node_idx(const document::Bucket& bucket) const
{
auto cluster_state = _cluster_state_bundle.getDerivedClusterState(bucket.getBucketSpace());
return _distribution.getIdealDistributorNode(*cluster_state, bucket.getBucketId());
}
BmDistribution::DistributionConfig
BmDistribution::get_distribution_config() const
{
return _distribution_config;
}
ClusterStateBundle
BmDistribution::get_cluster_state_bundle() const
{
return _cluster_state_bundle;
}
void
BmDistribution::set_node_state(uint32_t node_idx, bool distributor, const State& state)
{
const NodeType& node_type = distributor ? NodeType::DISTRIBUTOR : NodeType::STORAGE;
Node node(node_type, node_idx);
NodeState node_state(node_type, state);
_pending_cluster_state.setNodeState(node, node_state);
if (!_has_pending_cluster_state) {
_pending_cluster_state.setVersion(_pending_cluster_state.getVersion() + 1);
_has_pending_cluster_state = true;
}
}
void
BmDistribution::set_node_state(uint32_t node_idx, const State& state)
{
set_node_state(node_idx, false, state);
set_node_state(node_idx, true, state);
}
void
BmDistribution::commit_cluster_state_change()
{
if (_has_pending_cluster_state) {
_cluster_state_bundle = ClusterStateBundle(_pending_cluster_state);
_has_pending_cluster_state = false;
}
}
};
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