skywalking-java/docs/en/setup/backend/backend-storage.md

Backend storage

SkyWalking storage is pluggable, we have provided the following storage solutions, you could easily use is by changing the application.yml

• H2
• ElasticSearch 6

H2

Active H2 as storage, set storage provider to H2. Default in distribution package.

Setting fragment example

ElasticSearch 6

Active ElasticSearch 6 as storage, set storage provider to elasticsearch.

Setting fragment example

storage:
  elasticsearch:
    clusterNodes: localhost:9200
    indexShardsNumber: 2
    indexReplicasNumber: 0
    # Batch process setting, refer to https://www.elastic.co/guide/en/elasticsearch/client/java-api/5.5/java-docs-bulk-processor.html
    bulkActions: 2000 # Execute the bulk every 2000 requests
    bulkSize: 20 # flush the bulk every 20mb
    flushInterval: 10 # flush the bulk every 10 seconds whatever the number of requests
    concurrentRequests: 2 # the number of concurrent requests
    # Set a timeout on metric data. After the timeout has expired, the metric data will automatically be deleted.
    traceDataTTL: 90 # Unit is minute
    minuteMetricDataTTL: 90 # Unit is minute
    hourMetricDataTTL: 36 # Unit is hour
    dayMetricDataTTL: 45 # Unit is day
    monthMetricDataTTL: 18 # Unit is month

More storage solution extension

Follow Storage extension development guide in Project Extensions document in development guide.