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DataStax Enterprise 6.8 Security Guide

    • About DSE Advanced Security
    • Security FAQs
    • Security checklists
    • Securing the environment
      • Securing ports
      • Securing the TMP directory
    • Authentication and authorization
      • Configuring authentication and authorization
        • About DSE Unified Authentication
          • Steps for new deployment
          • Steps for production environments
        • Configuring security keyspaces
        • Setting up Kerberos
          • Kerberos guidelines
          • Enabling JCE Unlimited
            • Removing AES-256
          • Preparing DSE nodes for Kerberos
            • DNS and NTP
            • krb5.conf
            • Principal
            • Keytab
        • Enabling authentication and authorization
          • Defining a Kerberos scheme
          • Defining an LDAP scheme
        • Configuring JMX authentication
        • Configuring cache settings
        • Securing schema information
      • Managing database access
        • About RBAC
        • Setting up logins and users
          • Adding a superuser login
          • Adding database users
          • LDAP users and groups
            • LDAP logins
            • LDAP groups
          • Kerberos principal logins
          • Setting up roles for applications
          • Binding a role to an authentication scheme
        • Assigning permissions
          • Database object permissions
            • Data resources
            • Functions and aggregate resources
            • Search indexes
            • Roles
            • Proxy login and execute
            • Authentication schemes
            • DSE Utilities (MBeans)
            • Analytic applications
            • Remote procedure calls
          • Separation of duties
          • Keyspaces and tables
          • Row Level Access Control (RLAC)
          • Search index permissions
          • DataStax Graph keyspace
          • Spark application permissions
          • DataStax Studio permissions
          • Remote procedure calls
          • DSE client-tool spark
          • JMX MBean permissions
          • Deny (denylist) db object permission
          • Restricting access to data
      • Providing credentials from DSE tools
        • About clients
        • Internal and LDAP authentication
          • Command line
          • File
          • Environment variables
          • Using CQLSH
        • Kerberos
          • JAAS configuration file location
          • Keytab
          • Ticket Cache
          • Spark jobs
          • SSTableLoader
          • Graph and gremlin-console
          • dsetool
          • CQLSH
        • Nodetool
        • JConsole
    • Auditing database activity
      • Enabling database auditing
      • Capturing DSE Search HTTP requests
      • Log formats
      • View events from DSE audit table
    • Transparent data encryption
      • About Transparent Data Encryption
      • Configuring local encryption
        • Setting up local encryption keys
        • Encrypting configuration file properties
        • Encrypting system resources
        • Encrypting tables
        • Rekeying existing data
        • Using tools with TDE-encrypted SSTables
        • Troubleshooting encryption key errors
      • Configuring KMIP encryption
      • Encrypting Search indexes
        • Encrypting new Search indexes
        • Encrypting existing Search indexes
        • Tuning encrypted Search indexes
      • Migrating encrypted tables from earlier versions
      • Bulk loading data between TDE-enabled clusters
    • Configuring SSL
      • Steps for configuring SSL
      • Creating SSL certificates, keystores, and truststores
        • Remote keystore provider
        • Local keystore files
      • Securing node-to-node connections
      • Securing client-to-node connections
        • Configuring JMX on the server side
        • nodetool, nodesync, dsetool, and Advanced Replication
        • JConsole (JMX)
        • SSTableloader
        • Connecting to SSL-enabled nodes using cqlsh
      • Enabling SSL encryption for DSEFS
      • Reference: SSL instruction variables
    • Securing Spark connections
  • DataStax Enterprise 6.8 Security Guide
  • Transparent data encryption
  • Encrypting Search indexes
  • Tuning encrypted Search indexes

Tuning Encrypted Search Indexes

The primary configuration settings for tuning search index encryption are in the dse.yaml configuration file.

Procedure

  1. Locate the dse.yaml configuration file. The location of this file depends on the type of installation:

    • Package installations: /etc/dse/dse.yaml

    • Tarball installations: <installation_location>/resources/dse/conf/dse.yaml

  2. In the dse.yaml file on each node, adjust the index encryption options:

    # solr_encryption_options:
    #    decryption_cache_offheap_allocation: true
    #    decryption_cache_size_in_mb: 256
    1. decryption_cache_offheap_allocation - Specify whether to allocate search decryption cache off JVM heap.

    2. decryption_cache_size_in_mb - Sets the maximum size of shared search decryption cache, in megabytes (MB).

  3. Additional properties in the Search index config are available to tune encryption, although DataStax recommends using the default settings:

    <directoryFactory name="DirectoryFactory" class="solr.EncryptedFSDirectoryFactory">
        <bool name="solr.crypto.cache.enabled">true</bool>
        <int name="solr.crypto.encryption.workers">2</int>
        <int name="solr.crypto.encryption.bufferpool.sizeinbytes">10240</int>
     </directoryFactory>
  4. To monitor the decryption cache, use Java Management Extensions (JMX) and the Solr Admin UI to view the Apache Solr metrics that are provided for Block Cache.

    For tuning purposes, review the hitratio metric. If hitratio is below 1.00, the cache is too small to fit the entire decrypted index into memory.

  5. To verify which files are encrypted, use this command to list all DSE Search index files for the specified search core on the local node:

    dsetool list_index_files <keyspace_name>.<table_name> [--index <directory>]

    where --index <directory> specifies the data directory that contains the search index files. When not specified, the default directory is inferred from the search core name.

Encrypting existing Search indexes Migrating encrypted tables from earlier versions

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