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>.NET/C#</a>
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<a href="/docs/2.9.1/logging"
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<a href="/docs/2.9.1/starting-nodes" class='' >Starting and Stopping Nodes</a>
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<a href="/docs/2.9.1/clustering/clustering"
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<a href="/docs/2.9.1/clustering/zookeeper-discovery"
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>ZooKeeper Discovery</a>
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<a href="/docs/2.9.1/clustering/discovery-in-the-cloud"
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>Discovery in the Cloud</a>
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<a href="/docs/2.9.1/clustering/network-configuration"
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>Network Configuration</a>
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<a href="/docs/2.9.1/clustering/connect-client-nodes"
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<a href="/docs/2.9.1/thin-clients/dotnet-thin-client"
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>.NET Thin Client</a>
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<a href="/docs/2.9.1/thin-clients/cpp-thin-client"
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>C++ Thin Client</a>
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>Python Thin Client</a>
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<a href="/docs/2.9.1/thin-clients/php-thin-client"
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>PHP Thin Client</a>
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<a href="/docs/2.9.1/thin-clients/nodejs-thin-client"
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<li><a href="/docs/2.9.1/binary-client-protocol/key-value-queries" class=''>Key-Value Queries</a></li>
<li><a href="/docs/2.9.1/binary-client-protocol/sql-and-scan-queries" class=''>SQL and Scan Queries</a></li>
<li><a href="/docs/2.9.1/binary-client-protocol/binary-type-metadata" class=''>Binary Types Metadata</a></li>
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<a href="/docs/2.9.1/data-modeling/data-modeling"
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<a href="/docs/2.9.1/data-modeling/data-partitioning"
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<a href="/docs/2.9.1/data-modeling/affinity-collocation"
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<li>
<a href="/docs/2.9.1/data-modeling/binary-marshaller"
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<button type='button' class='group-toggle collapsed '>Configuring Memory<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
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<a href="/docs/2.9.1/memory-architecture"
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<a href="/docs/2.9.1/memory-configuration/data-regions"
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>Configuring Data Regions</a>
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<li>
<a href="/docs/2.9.1/memory-configuration/eviction-policies"
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<button type='button' class='group-toggle collapsed '>Configuring Persistence<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
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<a href="/docs/2.9.1/persistence/native-persistence"
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<li>
<a href="/docs/2.9.1/persistence/external-storage"
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>External Storage</a>
</li>
<li>
<a href="/docs/2.9.1/persistence/swap"
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>Swapping</a>
</li>
<li>
<a href="/docs/2.9.1/persistence/custom-cache-store"
class=''
>Implementing Custom Cache Store</a>
</li>
<li>
<a href="/docs/2.9.1/persistence/snapshots"
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>Cluster Snapshots</a>
</li>
<li>
<a href="/docs/2.9.1/persistence/disk-compression"
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>Disk Compression</a>
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<li>
<a href="/docs/2.9.1/persistence/persistence-tuning"
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<button type='button' class='group-toggle collapsed '>Configuring Caches<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
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<li>
<a href="/docs/2.9.1/configuring-caches/configuration-overview"
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<li>
<a href="/docs/2.9.1/configuring-caches/configuring-backups"
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>Configuring Partition Backups</a>
</li>
<li>
<a href="/docs/2.9.1/configuring-caches/partition-loss-policy"
class=''
>Partition Loss Policy</a>
</li>
<li>
<a href="/docs/2.9.1/configuring-caches/atomicity-modes"
class=''
>Atomicity Modes</a>
</li>
<li>
<a href="/docs/2.9.1/configuring-caches/expiry-policies"
class=''
>Expiry Policy</a>
</li>
<li>
<a href="/docs/2.9.1/configuring-caches/on-heap-caching"
class=''
>On-Heap Caching</a>
</li>
<li>
<a href="/docs/2.9.1/configuring-caches/cache-groups"
class=''
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</li>
<li>
<a href="/docs/2.9.1/configuring-caches/near-cache"
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</li>
<li>
<a href="/docs/2.9.1/data-rebalancing" class='' >Data Rebalancing</a>
</li>
<li>
<a href="/docs/2.9.1/data-streaming" class='' >Data Streaming</a>
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<li>
<button type='button' class='group-toggle collapsed '>Using Key-Value API<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
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<a href="/docs/2.9.1/key-value-api/basic-cache-operations"
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<a href="/docs/2.9.1/key-value-api/binary-objects"
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</li>
<li>
<a href="/docs/2.9.1/key-value-api/using-scan-queries"
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>Using Scan Queries</a>
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<li>
<a href="/docs/2.9.1/read-repair"
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>Read Repair</a>
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<li>
<a href="/docs/2.9.1/key-value-api/transactions" class='' >Performing Transactions</a>
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<button type='button' class='group-toggle collapsed '>Working with SQL<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
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<li>
<a href="/docs/2.9.1/SQL/sql-introduction"
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<a href="/docs/2.9.1/SQL/schemas"
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<li>
<a href="/docs/2.9.1/SQL/indexes"
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</li>
<li>
<a href="/docs/2.9.1/SQL/sql-api"
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<li>
<a href="/docs/2.9.1/SQL/distributed-joins"
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<li>
<a href="/docs/2.9.1/SQL/sql-transactions"
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<a href="/docs/2.9.1/SQL/custom-sql-func"
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<a href="/docs/2.9.1/SQL/JDBC/jdbc-driver"
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<a href="/docs/2.9.1/SQL/JDBC/jdbc-client-driver"
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<li><a href="/docs/2.9.1/SQL/ODBC/querying-modifying-data" class=''>Querying and Modifying Data</a></li>
<li><a href="/docs/2.9.1/SQL/ODBC/specification" class=''>Specification</a></li>
<li><a href="/docs/2.9.1/SQL/ODBC/data-types" class=''>Data Types</a></li>
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<a href="/docs/2.9.1/transactions/mvcc"
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<a href="/docs/2.9.1/sql-reference/sql-conformance"
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<a href="/docs/2.9.1/sql-reference/ddl"
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<li>
<a href="/docs/2.9.1/sql-reference/dml"
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>Data Manipulation Language (DML)</a>
</li>
<li>
<a href="/docs/2.9.1/sql-reference/transactions"
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>Transactions</a>
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<li>
<a href="/docs/2.9.1/sql-reference/operational-commands"
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>Operational Commands</a>
</li>
<li>
<a href="/docs/2.9.1/sql-reference/aggregate-functions"
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>Aggregate functions</a>
</li>
<li>
<a href="/docs/2.9.1/sql-reference/numeric-functions"
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>Numeric Functions</a>
</li>
<li>
<a href="/docs/2.9.1/sql-reference/string-functions"
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>String Functions</a>
</li>
<li>
<a href="/docs/2.9.1/sql-reference/date-time-functions"
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>Data and Time Functions</a>
</li>
<li>
<a href="/docs/2.9.1/sql-reference/system-functions"
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>System Functions</a>
</li>
<li>
<a href="/docs/2.9.1/sql-reference/data-types"
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<a href="/docs/2.9.1/distributed-computing/distributed-computing"
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<li>
<a href="/docs/2.9.1/distributed-computing/cluster-groups"
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>Cluster Groups</a>
</li>
<li>
<a href="/docs/2.9.1/distributed-computing/executor-service"
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>Executor Service</a>
</li>
<li>
<a href="/docs/2.9.1/distributed-computing/map-reduce"
class=''
>MapReduce API</a>
</li>
<li>
<a href="/docs/2.9.1/distributed-computing/load-balancing"
class=''
>Load Balancing</a>
</li>
<li>
<a href="/docs/2.9.1/distributed-computing/fault-tolerance"
class=''
>Fault Tolerance</a>
</li>
<li>
<a href="/docs/2.9.1/distributed-computing/job-scheduling"
class=''
>Job Scheduling</a>
</li>
<li>
<a href="/docs/2.9.1/distributed-computing/collocated-computations"
class=''
>Colocating Computations with Data</a>
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<li>
<button type='button' class='group-toggle collapsed '>Code Deployment<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
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<a href="/docs/2.9.1/code-deployment/deploying-user-code"
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<li>
<a href="/docs/2.9.1/code-deployment/peer-class-loading"
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>Peer Class Loading</a>
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<a href="/docs/2.9.1/machine-learning/machine-learning"
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>Machine Learning</a>
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<li>
<a href="/docs/2.9.1/machine-learning/partition-based-dataset"
class=''
>Partition Based Dataset</a>
</li>
<li>
<a href="/docs/2.9.1/machine-learning/updating-trained-models"
class=''
>Updating Trained Models</a>
</li>
<li>
<button
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class='collapsed '>Binary Classification<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
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<li><a href="/docs/2.9.1/machine-learning/binary-classification/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.9.1/machine-learning/binary-classification/linear-svm" class=''>Linear SVM (Support Vector Machine)</a></li>
<li><a href="/docs/2.9.1/machine-learning/binary-classification/decision-trees" class=''>Decision Trees</a></li>
<li><a href="/docs/2.9.1/machine-learning/binary-classification/multilayer-perceptron" class=''>Multilayer Perceptron</a></li>
<li><a href="/docs/2.9.1/machine-learning/binary-classification/logistic-regression" class=''>Logistic Regression</a></li>
<li><a href="/docs/2.9.1/machine-learning/binary-classification/knn-classification" class=''>k-NN Classification</a></li>
<li><a href="/docs/2.9.1/machine-learning/binary-classification/ann" class=''>ANN (Approximate Nearest Neighbor)</a></li>
<li><a href="/docs/2.9.1/machine-learning/binary-classification/naive-bayes" class=''>Naive Bayes</a></li>
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</li>
<li>
<button
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class='collapsed '>Regression<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
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<li><a href="/docs/2.9.1/machine-learning/regression/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.9.1/machine-learning/regression/linear-regression" class=''>Linear Regression</a></li>
<li><a href="/docs/2.9.1/machine-learning/regression/decision-trees-regression" class=''>Decision Trees Regression</a></li>
<li><a href="/docs/2.9.1/machine-learning/regression/knn-regression" class=''>k-NN Regression</a></li>
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</li>
<li>
<button
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class='collapsed '>Clustering<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
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<li><a href="/docs/2.9.1/machine-learning/clustering/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.9.1/machine-learning/clustering/k-means-clustering" class=''>K-Means Clustering</a></li>
<li><a href="/docs/2.9.1/machine-learning/clustering/gaussian-mixture" class=''>Gaussian mixture (GMM)</a></li>
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</li>
<li>
<a href="/docs/2.9.1/machine-learning/preprocessing"
class=''
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<li>
<button
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<li><a href="/docs/2.9.1/machine-learning/model-selection/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.9.1/machine-learning/model-selection/evaluator" class=''>Evaluator</a></li>
<li><a href="/docs/2.9.1/machine-learning/model-selection/split-the-dataset-on-test-and-train-datasets" class=''>Split the dataset on test and train datasets</a></li>
<li><a href="/docs/2.9.1/machine-learning/model-selection/hyper-parameter-tuning" class=''>Hyper-parameter tuning</a></li>
<li><a href="/docs/2.9.1/machine-learning/model-selection/pipeline-api" class=''>Pipeline API</a></li>
</nav>
</li>
<li>
<a href="/docs/2.9.1/machine-learning/multiclass-classification"
class=''
>Multiclass Classification</a>
</li>
<li>
<button
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class='collapsed '>Ensemble Methods<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
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<li><a href="/docs/2.9.1/machine-learning/ensemble-methods/introduction" class=''></a></li>
<li><a href="/docs/2.9.1/machine-learning/ensemble-methods/stacking" class=''>Stacking</a></li>
<li><a href="/docs/2.9.1/machine-learning/ensemble-methods/baggin" class=''>Bagging</a></li>
<li><a href="/docs/2.9.1/machine-learning/ensemble-methods/random-forest" class=''>Random Forest</a></li>
<li><a href="/docs/2.9.1/machine-learning/ensemble-methods/gradient-boosting" class=''>Gradient Boosting</a></li>
</nav>
</li>
<li>
<a href="/docs/2.9.1/machine-learning/recommendation-systems"
class=''
>Recommendation Systems</a>
</li>
<li>
<button
type='button'
class='collapsed '>Importing Model<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.9.1/machine-learning/importing-model/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.9.1/machine-learning/importing-model/model-import-from-gxboost" class=''>Import Model from XGBoost</a></li>
<li><a href="/docs/2.9.1/machine-learning/importing-model/model-import-from-apache-spark" class=''>Import Model from Apache Spark</a></li>
</nav>
</li>
</nav>
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<article data-swiftype-index='true'>
<a class='edit-link' href="https://github.com/apache/ignite/tree/IGNITE-7595/docs/_docs/clustering/baseline-topology.adoc" target="_blank">Edit</a>
<h1>Baseline Topology</h1>
<div id="preamble">
<div class="sectionbody">
<div class="paragraph">
<p>The <em>baseline topology</em> is a set of nodes meant to hold data.
The concept of baseline topology was introduced to give you the ability to control when you want to
<a href="/docs/2.9.1/data-modeling/data-partitioning#rebalancing">rebalance the data in the cluster</a>. For example, if
you have a cluster of 3 nodes where the data is distributed between the nodes, and you add 2 more nodes, the rebalancing
process re-distributes the data between all 5 nodes. The rebalancing process happens when the
baseline topology changes, which can either happen automatically or be triggered manually.</p>
</div>
<div class="paragraph">
<p>The baseline topology only includes server nodes; client nodes are never included because they do not store data.</p>
</div>
<div class="paragraph">
<p>The purpose of the baseline topology is to:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>Avoid unnecessary data transfer when a server node leaves the cluster for a short period of time, for example, due to
occasional network failures or scheduled server maintenance.</p>
</li>
<li>
<p>Give you the ability to control when you want to rebalance the data.</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>Baseline topology changes automatically when <a href="#baseline-topology-autoadjustment">Baseline Topology Autoadjustment</a> is enabled. This is the default
behavior for pure in-memory clusters. For persistent clusters, the baseline topology autoadjustment feature must be enabled
manually. By default, it is disabled and you have to change the baseline topology manually. You can change the baseline
topology using the <a href="/docs/2.9.1/control-script#activation-deactivation-and-topology-management">control script</a>.</p>
</div>
<div class="admonitionblock caution">
<table>
<tr>
<td class="icon">
<div class="title">Caution</div>
</td>
<td class="content">
<div class="paragraph">
<p>Any attempt to create a cache while the baseline topology is being changed results in an exception.
For more details, see <a href="/docs/2.9.1/key-value-api/basic-cache-operations#creating-caches-dynamically">Creating Caches Dynamically</a>.</p>
</div>
</td>
</tr>
</table>
</div>
</div>
</div>
<div class="sect1">
<h2 id="baseline-topology-in-pure-in-memory-clusters">Baseline Topology in Pure In-Memory Clusters</h2>
<div class="sectionbody">
<div class="paragraph">
<p>In pure in-memory clusters, the default behavior is to adjust the baseline topology to the set of all server nodes
automatically when you add or remove server nodes from the cluster. The data is rebalanced automatically, too.
You can disable the baseline autoadjustment feature and manage baseline topology manually.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<div class="title">Note</div>
</td>
<td class="content">
In previous releases, baseline topology was relevant only to clusters with persistence.
However, since version 2.8.0, it applies to in-memory clusters as well.
If you have a pure in-memory cluster, the transition should be transparent for you because, by default, the baseline topology changes automatically when a server node leaves or joins the cluster.
</td>
</tr>
</table>
</div>
</div>
</div>
<div class="sect1">
<h2 id="baseline-topology-in-persistent-clusters">Baseline Topology in Persistent Clusters</h2>
<div class="sectionbody">
<div class="paragraph">
<p>If your cluster has at least one data region in which persistence is enabled, the cluster is inactive when you start it for the first time.
In the inactive state, all operations are prohibited.
The cluster must be activated before you can create caches and upload data.
Cluster activation sets the current set of server nodes as the baseline topology.
When you restart the cluster, it is activated automatically as soon as all nodes that are registered in the baseline topology join in.
However, if some nodes do not join after a restart, you must to activate the cluster manually.</p>
</div>
<div class="paragraph">
<p>You can activate the cluster using one of the following tools:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><a href="/docs/2.9.1/control-script#activating-cluster">Control script</a></p>
</li>
<li>
<p><a href="/docs/2.9.1/restapi#change-cluster-state">REST API command</a></p>
</li>
<li>
<p>Programmatically:</p>
<code-tabs><code-tab data-tab='Java'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="java"><span class="nc">Ignite</span> <span class="n">ignite</span> <span class="o">=</span> <span class="nc">Ignition</span><span class="o">.</span><span class="na">start</span><span class="o">();</span>
<span class="n">ignite</span><span class="o">.</span><span class="na">cluster</span><span class="o">().</span><span class="na">state</span><span class="o">(</span><span class="nc">ClusterState</span><span class="o">.</span><span class="na">ACTIVE</span><span class="o">);</span></code></pre>
</div>
</div></code-tab><code-tab data-tab='C#/.NET'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="csharp"><span class="n">IIgnite</span> <span class="n">ignite</span> <span class="p">=</span> <span class="n">Ignition</span><span class="p">.</span><span class="nf">Start</span><span class="p">();</span>
<span class="n">ignite</span><span class="p">.</span><span class="nf">GetCluster</span><span class="p">().</span><span class="nf">SetActive</span><span class="p">(</span><span class="k">true</span><span class="p">);</span></code></pre>
</div>
</div></code-tab><code-tab data-tab='C++'></code-tab></code-tabs>
</li>
</ul>
</div>
</div>
</div>
<div class="sect1">
<h2 id="baseline-topology-autoadjustment">Baseline Topology Autoadjustment</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Instead of changing the baseline topology manually, you can let the cluster do it automatically. This feature is called
Baseline Topology Autoadjustment. When it is enabled, the cluster monitors the state of its server nodes and sets the
baseline on the current topology automatically when the cluster topology is stable for a configurable period of time.</p>
</div>
<div class="paragraph">
<p>Here is what happens when the set of nodes in the cluster changes:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>The cluster waits for a configurable amount of time (5 min by default).</p>
</li>
<li>
<p>If there are no other topology changes during this period, Ignite sets the baseline topology to the current set of nodes.</p>
</li>
<li>
<p>If the set of nodes changes during this period, the timeout is updated.</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>Each change in the set of nodes resets the timeout for autoadjustment.
When the timeout expires and the current set of nodes is different from the baseline topology (for example, new nodes
are present or some old nodes left), Ignite changes the baseline topology to the current set of nodes.
This also triggers data rebalancing.</p>
</div>
<div class="paragraph">
<p>The autoadjustment timeout allows you to avoid data rebalancing when a node disconnects for a short period due to a
temporary network problem or when you want to quickly restart the node.
You can set the timeout to a higher value if you expect temporary changes in the set of nodes and don&#8217;t want to change
the baseline topology.</p>
</div>
<div class="paragraph">
<p>Baseline topology is autoadjusted only if the cluster is in the active state.</p>
</div>
<div class="paragraph">
<p>To enable automatic baseline adjustment, you can use the
<a href="/docs/2.9.1/control-script#enabling-baseline-topology-autoadjustment">control script</a> or the
programmatic API methods shown below:</p>
</div>
<code-tabs><code-tab data-tab='Java'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="java"><span class="nc">Ignite</span> <span class="n">ignite</span> <span class="o">=</span> <span class="nc">Ignition</span><span class="o">.</span><span class="na">start</span><span class="o">();</span>
<span class="n">ignite</span><span class="o">.</span><span class="na">cluster</span><span class="o">().</span><span class="na">baselineAutoAdjustEnabled</span><span class="o">(</span><span class="kc">true</span><span class="o">);</span>
<span class="n">ignite</span><span class="o">.</span><span class="na">cluster</span><span class="o">().</span><span class="na">baselineAutoAdjustTimeout</span><span class="o">(</span><span class="mi">30000</span><span class="o">);</span></code></pre>
</div>
</div></code-tab><code-tab data-tab='C#/.NET'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="csharp"><span class="n">IIgnite</span> <span class="n">ignite</span> <span class="p">=</span> <span class="n">Ignition</span><span class="p">.</span><span class="nf">Start</span><span class="p">();</span>
<span class="n">ignite</span><span class="p">.</span><span class="nf">GetCluster</span><span class="p">().</span><span class="nf">SetBaselineAutoAdjustEnabledFlag</span><span class="p">(</span><span class="k">true</span><span class="p">);</span>
<span class="n">ignite</span><span class="p">.</span><span class="nf">GetCluster</span><span class="p">().</span><span class="nf">SetBaselineAutoAdjustTimeout</span><span class="p">(</span><span class="m">30000</span><span class="p">);</span></code></pre>
</div>
</div></code-tab><code-tab data-tab='C++'></code-tab></code-tabs>
<div class="paragraph">
<p>To disable automatic baseline adjustment, use the same method with <code>false</code> passed in:</p>
</div>
<code-tabs><code-tab data-tab='Java'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="java"><span class="n">ignite</span><span class="o">.</span><span class="na">cluster</span><span class="o">().</span><span class="na">baselineAutoAdjustEnabled</span><span class="o">(</span><span class="kc">false</span><span class="o">);</span></code></pre>
</div>
</div></code-tab><code-tab data-tab='C#/.NET'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="csharp"><span class="n">ignite</span><span class="p">.</span><span class="nf">GetCluster</span><span class="p">().</span><span class="nf">SetBaselineAutoAdjustEnabledFlag</span><span class="p">(</span><span class="k">false</span><span class="p">);</span></code></pre>
</div>
</div></code-tab><code-tab data-tab='C++'></code-tab></code-tabs>
</div>
</div>
<div class="sect1">
<h2 id="monitoring-baseline-topology">Monitoring Baseline Topology</h2>
<div class="sectionbody">
<div class="paragraph">
<p>You can use the following tools to monitor and/or manage the baseline topology:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><a href="/docs/2.9.1/control-script">Control Script</a></p>
</li>
<li>
<p><a href="/docs/2.9.1/monitoring-metrics/metrics#monitoring-topology">JMX Beans</a></p>
</li>
</ul>
</div>
</div>
</div>
<div class="copyright">
© 2021 The Apache Software Foundation.<br/>
Apache, Apache Ignite, the Apache feather and the Apache Ignite logo are either registered trademarks or trademarks of The Apache Software Foundation.
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<ul class="sectlevel1">
<li><a href="#baseline-topology-in-pure-in-memory-clusters">Baseline Topology in Pure In-Memory Clusters</a></li>
<li><a href="#baseline-topology-in-persistent-clusters">Baseline Topology in Persistent Clusters</a></li>
<li><a href="#baseline-topology-autoadjustment">Baseline Topology Autoadjustment</a></li>
<li><a href="#monitoring-baseline-topology">Monitoring Baseline Topology</a></li>
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