Cross-cluster search in Elasticsearch - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is Cross-cluster search in Elasticsearch?

Cross-cluster search allows you to search data across multiple Elasticsearch clusters as if they were one. It helps gather results from different places quickly.

intermediate

How do you configure a remote cluster for cross-cluster search?

You add the remote cluster's address to your local cluster settings using the cluster.remote.<name>.seeds setting. This tells your cluster where to find the remote one.

beginner

What is the role of the search request in cross-cluster search?

The search request can include remote cluster prefixes like cluster_name:index_name to specify which cluster and index to search in.

beginner

Can cross-cluster search be used to write data to remote clusters?

No, cross-cluster search is only for reading data across clusters. Writing data requires other methods like cross-cluster replication or direct indexing.

beginner

What are some benefits of using cross-cluster search?

It helps combine data from multiple clusters without moving data around. This improves search speed and keeps data organized in separate clusters.

What setting is used to add a remote cluster for cross-cluster search?

A index.remote.settings

B cluster.remote.<name>.seeds

C search.remote.cluster

D cluster.local.address

The cluster.remote.<name>.seeds setting specifies the addresses of remote clusters for cross-cluster search.

How do you specify a remote cluster index in a search query?

A Use <code>cluster_name:index_name</code> format

B Use <code>index_name@cluster_name</code> format

C Use <code>remote:index_name</code> format

D Use <code>index_name</code> only

You prefix the index with the remote cluster name like cluster_name:index_name to search that cluster.

Can cross-cluster search write data to remote clusters?

A Only if enabled in settings

B Yes, it can write and read data

C No, it only reads data

D Only for specific indices

Cross-cluster search is designed only for reading data across clusters, not writing.

What is a main advantage of cross-cluster search?

A Combining data from multiple clusters without moving it

B Faster data indexing

C Automatic data backup

D Improved data encryption

Cross-cluster search lets you search across clusters without copying data, saving time and storage.

Which Elasticsearch API is used to perform cross-cluster search?

A Index API

B Snapshot API

C Cluster API

D Search API

The Search API is used to query data across clusters in cross-cluster search.

Explain how to set up and use cross-cluster search in Elasticsearch.

Think about connecting clusters and how to ask for data from them.

Describe the benefits and limitations of cross-cluster search.

Consider what cross-cluster search can and cannot do.