Namespace Service of JindoFS supports different metadata storage backends. By default, RocksDB is used. This topic describes how to configure RocksDB as the metadata storage backend.

Background information

RocksDB cannot be configured in high availability mode. If you need to configure a metadata storage backend in high availability mode, we recommend that you use Tablestore or Raft instances. For more information, see Use Tablestore instances to store metadata and Use Raft-RocksDB-Tablestore to store metadata.
The following figure shows the structure of a single RocksDB instance for Namespace Service.RocksDB
  1. Go to the SmartData service.
    1. Log on to the EMR console.
    2. In the top navigation bar, select the region where your cluster resides. Select the resource group as required. By default, all resources of the account appear.
    3. Click the Cluster Management tab.
    4. On the Cluster Management page that appears, find the target cluster and click Details in the Actions column.
    5. In the left-side navigation pane, click Cluster Service and then SmartData.
  2. Go to the namespace tab for the SmartData service.
    1. Click the Configure tab.
    2. Click the namespace tab in the Service Configuration section.
      namespace
  3. Set namespace.backend.type to rocksdb.
  4. Save the configurations.
    1. In the upper-right corner of the Service Configuration section, click Save.
    2. In the Confirm Changes dialog box, specify Description and turn on Auto-update Configuration.
    3. Click OK.
  5. Select Restart Jindo Namespace Service from the Actions drop-down list in the upper-right corner.