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Internals
quasardb Table Of Contents
  • Primerkeyboard_arrow_down
    • What is quasardb?
    • Shall we dance?
    • Inserting timeseries data
    • Working with the data
    • Organizing your data
    • That demo is nice, but what happens when I go to production?
    • Going further
    • Wrap up
  • Server Administrationkeyboard_arrow_down
    • 1. Installationkeyboard_arrow_down
      • 1.1. System Requirementskeyboard_arrow_down
        • 1.1.1. x64 build
        • 1.1.2. Core2 build
        • 1.1.3. ARM64 build
      • 1.2. Installation
      • 1.3. Next steps
    • 2. Configurationkeyboard_arrow_down
      • 2.1. QuasarDB Daemonkeyboard_arrow_down
        • 2.1.1. License
        • 2.1.2. Storage
        • 2.1.3. Networking
        • 2.1.4. Clustering
        • 2.1.5. Security
        • 2.1.6. Performance tuning
        • 2.1.7. Observability
        • 2.1.8. Asynchronous Timeseries Inserter
      • 2.2. QuasarDB Rest Server
      • 2.3. Docker
    • 3. Performance tuningkeyboard_arrow_down
      • 3.1. Daemon
      • 3.2. Testing cluster connectivity
      • 3.3. Rules of thumb
      • 3.4. Recommendations
      • 3.5. File system
      • 3.6. OS X Recommendations
      • 3.7. Linux Recommendations
    • 4. Routine maintenance taskskeyboard_arrow_down
      • 4.1. Graceful shutdown
      • 4.2. Cluster trimming
      • 4.3. Log rotation
      • 4.4. Backups
    • 5. Observabilitykeyboard_arrow_down
      • 5.1. Statistics
      • 5.2. Performance Tracing
    • 6. Securitykeyboard_arrow_down
      • 6.1. Enable access-control
      • 6.2. Key management
      • 6.3. Cluster key generation
      • 6.4. User management
      • 6.5. Authentication
      • 6.6. Authorizationkeyboard_arrow_down
        • 6.6.1. Privileges
        • 6.6.2. Reference
      • 6.7. Encrypted communication
      • 6.8. Access control
  • User Guidekeyboard_arrow_down
    • 1. Toolskeyboard_arrow_down
      • 1.1. quasardb shellkeyboard_arrow_down
        • 1.1.1. Introduction
        • 1.1.2. Command line options
        • 1.1.3. Interactive mode
        • 1.1.4. Non-interactive mode
        • 1.1.5. Command reference
      • 1.2. quasardb import toolkeyboard_arrow_down
        • 1.2.1. Introduction
        • 1.2.2. Quick Reference
        • 1.2.3. Configuration file
        • 1.2.4. Parsers
        • 1.2.5. Program Options
      • 1.3. quasardb export toolkeyboard_arrow_down
        • 1.3.1. Introduction
        • 1.3.2. Quick Reference
        • 1.3.3. Program Options
      • 1.4. quasardb database toolkeyboard_arrow_down
        • 1.4.1. Introduction
        • 1.4.2. Quick Reference
        • 1.4.3. Important notice
        • 1.4.4. Log level
        • 1.4.5. Analyzing
        • 1.4.6. Scanning
        • 1.4.7. Upgrading
        • 1.4.8. Offline compaction
        • 1.4.9. Backup and restore
    • 2. Integrationskeyboard_arrow_down
      • 2.1. Grafana connectorkeyboard_arrow_down
        • 2.1.1. Introduction
        • 2.1.2. Prerequisites
        • 2.1.3. Installation
        • 2.1.4. Configuration
        • 2.1.5. Usage
      • 2.2. Kafka connectorkeyboard_arrow_down
        • 2.2.1. Introduction
        • 2.2.2. Installation
        • 2.2.3. Configuration
        • 2.2.4. Additional options
        • 2.2.5. Performance Considerations
      • 2.3. Excelkeyboard_arrow_down
        • 2.3.1. Introduction
        • 2.3.2. Installation
        • 2.3.3. Datasource
        • 2.3.4. First connection
        • 2.3.5. Querying data
        • 2.3.6. Exploring your tables
        • 2.3.7. Editing your dataset
      • 2.4. ODBCkeyboard_arrow_down
        • 2.4.1. Introduction
        • 2.4.2. Installation
        • 2.4.3. Setup installer
        • 2.4.4. Zip archive
        • 2.4.5. Driver Parameters
        • 2.4.6. Adding a datasource
        • 2.4.7. Using the driver or dsn with pyodbc
      • 2.5. Prometheus Remote Storagekeyboard_arrow_down
        • 2.5.1. Introduction
        • 2.5.2. Prerequisites
        • 2.5.3. Configuration
        • 2.5.4. How Prometheus metrics are mapped to QuasarDB
      • 2.6. SASkeyboard_arrow_down
        • 2.6.1. Introduction
        • 2.6.2. Installation
        • 2.6.3. Configuring the datasource
        • 2.6.4. Test the connection
        • 2.6.5. Examples
      • 2.7. Spark connectorkeyboard_arrow_down
        • 2.7.1. Introduction
        • 2.7.2. Querying quasardb
        • 2.7.3. Writing to quasardb
        • 2.7.4. Tests
        • 2.7.5. A note for macOS users
      • 2.8. Tableaukeyboard_arrow_down
        • 2.8.1. Introduction
        • 2.8.2. Installation
        • 2.8.3. Datasource
        • 2.8.4. First connection
        • 2.8.5. Querying data
    • 3. APIskeyboard_arrow_down
      • 3.1. Tutorialkeyboard_arrow_down
        • 3.1.1. Requirements
        • 3.1.2. Installing libraries
        • 3.1.3. Importing libraries
        • 3.1.4. Connection management
        • 3.1.5. Creating a table
        • 3.1.6. A word about API types
        • 3.1.7. Row oriented API
        • 3.1.8. Column oriented API
        • 3.1.9. Queries
        • 3.1.10. Dropping a table
        • 3.1.11. Full example
      • 3.2. Reference
    • 4. Best practiceskeyboard_arrow_down
      • 4.1. Managing tables with Tagskeyboard_arrow_down
        • 4.1.1. Defining your tables
        • 4.1.2. Defining your tags
        • 4.1.3. Querying using tags
      • 4.2. Reaching your performance goalskeyboard_arrow_down
        • 4.2.1. System architecture
        • 4.2.2. QuasarDB daemon configuration
        • 4.2.3. Database architecture
        • 4.2.4. Importing data
        • 4.2.5. Running queries
  • Query languagekeyboard_arrow_down
    • 1. Create tablekeyboard_arrow_down
      • 1.1. Synopsis
      • 1.2. Description
      • 1.3. Parameters
      • 1.4. Examples
    • 2. Delete fromkeyboard_arrow_down
      • 2.1. Synopsis
      • 2.2. Description
      • 2.3. Parameters
      • 2.4. Examples
    • 3. Drop tablekeyboard_arrow_down
      • 3.1. Synopsis
      • 3.2. Description
      • 3.3. Parameters
      • 3.4. Examples
    • 4. Alter tablekeyboard_arrow_down
      • 4.1. Synopsis
      • 4.2. Description
      • 4.3. Parameters
      • 4.4. Examples
    • 5. Show tableskeyboard_arrow_down
      • 5.1. Synopsis
      • 5.2. Description
      • 5.3. Examples
    • 6. Selectkeyboard_arrow_down
      • 6.1. Synopsis
      • 6.2. Description
      • 6.3. Parameters
      • 6.4. Examples
      • 6.5. Advanced examples
      • 6.6. IN FIND example
      • 6.7. ASOF joinskeyboard_arrow_down
        • 6.7.1. Filtering ASOF join results
        • 6.7.2. Examples
    • 7. Insertkeyboard_arrow_down
      • 7.1. Synopsis
      • 7.2. Description
      • 7.3. Parameters
      • 7.4. Examples
    • 8. Function & Operatorskeyboard_arrow_down
      • 8.1. Aggregate functions
      • 8.2. Comparison operators
      • 8.3. Logical operators
      • 8.4. Arithmetic operator
      • 8.5. Bitwise operators
      • 8.6. Regular expressions
      • 8.7. IP related functions
      • 8.8. Geographical functions
      • 8.9. Lookup functionkeyboard_arrow_down
        • 8.9.1. Example
      • 8.10. Cast function
    • 9. Timestampskeyboard_arrow_down
      • 9.1. Absolute
      • 9.2. Durations
      • 9.3. Offsets
    • 10. Key/value lookupskeyboard_arrow_down
      • 10.1. Examples
    • 11. Grantkeyboard_arrow_down
      • 11.1. Synopsis
      • 11.2. Description
      • 11.3. Parameters
      • 11.4. Examples
    • 12. Revokekeyboard_arrow_down
      • 12.1. Synopsis
      • 12.2. Description
      • 12.3. Parameters
      • 12.4. Examples
    • 13. Show grantskeyboard_arrow_down
      • 13.1. Synopsis
      • 13.2. Description
      • 13.3. Parameters
      • 13.4. Examples
    • 14. Show disk usagekeyboard_arrow_down
      • 14.1. Synopsis
      • 14.2. Description
      • 14.3. Parameters
      • 14.4. Examples
  • Internalskeyboard_arrow_down
    • 1. Transactionskeyboard_arrow_down
      • 1.1. Overview
      • 1.2. Characteristics
      • 1.3. Designkeyboard_arrow_down
        • 1.3.1. Unique Transaction Identifier
        • 1.3.2. Multiple Versions and Garbage Collection
      • 1.4. Batch or transaction
    • 2. Clusteringkeyboard_arrow_down
      • 2.1. What is a Cluster?
      • 2.2. Stabilization
      • 2.3. Adding a Node to a Cluster
      • 2.4. Removing a Node from a Cluster
      • 2.5. Recovering from Node Failure
      • 2.6. Nodes IDs
    • 3. Data Storagekeyboard_arrow_down
      • 3.1. Where are Entries Stored in the Cluster?
      • 3.2. Where are Entries Stored in a Node?
      • 3.3. Cachekeyboard_arrow_down
        • 3.3.1. Transient mode
        • 3.3.2. Persistent read cache
        • 3.3.3. Cloud storage
      • 3.4. Data Migrationkeyboard_arrow_down
        • 3.4.1. Migration Process
      • 3.5. Data replicationkeyboard_arrow_down
        • 3.5.1. Principle
        • 3.5.2. How replication works with migration
        • 3.5.3. Conflict resolution
        • 3.5.4. Impact on reliability
        • 3.5.5. Impact on performance
        • 3.5.6. Fault tolerance
        • 3.5.7. Memory Cache and Eviction
      • 3.6. Data trimming
    • 4. Data Transferkeyboard_arrow_down
      • 4.1. Designed for Concurrencykeyboard_arrow_down
        • 4.1.1. Server
        • 4.1.2. Client
      • 4.2. Guarantees
      • 4.3. The Transfer Process
      • 4.4. Failure Caseskeyboard_arrow_down
        • 4.4.1. Cluster Unstable
        • 4.4.2. Topology Changed
        • 4.4.3. Timeout
      • 4.5. Data Conflictskeyboard_arrow_down
        • 4.5.1. A simple data conflict
        • 4.5.2. Resolving the simple conflict
        • 4.5.3. A more complex data conflict
        • 4.5.4. Best Practice: Plan for Concurrency
    • 5. Change Streamkeyboard_arrow_down
      • 5.1. Purpose
      • 5.2. Recorded information
      • 5.3. Update types
  • Supportkeyboard_arrow_down
    • 1. Contact
    • 2. Change logkeyboard_arrow_down
      • 2.1. 3.10.0 - “Marcus Aurelius” - 10/1/2021keyboard_arrow_down
        • 2.1.1. Changes in this version
      • 2.2. 3.9.9 - “Marcus Aurelius” - 7/6/2021keyboard_arrow_down
        • 2.2.1. Known bugs
        • 2.2.2. Changes in this version
      • 2.3. 3.9.8 - “Marcus Aurelius” - 3/25/2021keyboard_arrow_down
        • 2.3.1. Changes in this version
      • 2.4. 3.9.7 - “Marcus Aurelius” - 2/4/2021keyboard_arrow_down
        • 2.4.1. Changes in this version
      • 2.5. 3.9.6 - “Marcus Aurelius” - 12/03/2020keyboard_arrow_down
        • 2.5.1. Changes in this version
      • 2.6. 3.9.5 - “Marcus Aurelius” - 11/11/2020keyboard_arrow_down
        • 2.6.1. Changes in this version
      • 2.7. 3.9.4 - “Marcus Aurelius” - 9/23/2020keyboard_arrow_down
        • 2.7.1. Changes in this version
      • 2.8. 3.9.1 - “Marcus Aurelius” - 8/25/2020keyboard_arrow_down
        • 2.8.1. Changes in this version
      • 2.9. 3.9.0 - “Marcus Aurelius” - 8/4/2020keyboard_arrow_down
        • 2.9.1. Changes in this version
      • 2.10. 3.8.11 - “Crates” - 5/12/2021keyboard_arrow_down
        • 2.10.1. Changes in this version
      • 2.11. 3.8.10 - “Crates” - 1/7/2021keyboard_arrow_down
        • 2.11.1. Changes in this version
      • 2.12. 3.8.9 - “Crates” - 9/15/2020keyboard_arrow_down
        • 2.12.1. Changes in this version
      • 2.13. 3.8.7 - “Crates” - 7/30/2020keyboard_arrow_down
        • 2.13.1. Changes in this version
        • 2.13.2. Known bugs
      • 2.14. 3.8.6 - “Crates” - 7/23/2020keyboard_arrow_down
        • 2.14.1. Changes in this version
        • 2.14.2. Known bugs
      • 2.15. 3.8.5 - “Crates” - 7/17/2020keyboard_arrow_down
        • 2.15.1. Changes in this version
        • 2.15.2. Known bugs
      • 2.16. 3.8.4 - “Crates” - 7/10/2020keyboard_arrow_down
        • 2.16.1. Changes in this version
        • 2.16.2. Known bugs
      • 2.17. 3.8.3 - “Crates” - 6/10/2020keyboard_arrow_down
        • 2.17.1. Changes in this version
        • 2.17.2. Known bugs
      • 2.18. 3.8.2 - “Crates” - 5/18/2020keyboard_arrow_down
        • 2.18.1. Changes in this version
        • 2.18.2. Known bugs
      • 2.19. 3.8.1 - “Crates” - 4/20/2020keyboard_arrow_down
        • 2.19.1. Changes in this version
      • 2.20. 3.8.0 - “Crates” - 4/6/2020keyboard_arrow_down
        • 2.20.1. Changes in this version
      • 2.21. 3.7.0 - “Apollodorus” - 3/2/2020keyboard_arrow_down
        • 2.21.1. Changes in this version
      • 2.22. 3.6.0 - “Antipater” - 2/3/2020keyboard_arrow_down
        • 2.22.1. Changes in this version
      • 2.23. 3.5.0 - “Posidonius” - 12/23/2019keyboard_arrow_down
        • 2.23.1. Changes in this version
      • 2.24. 3.4.3 - “Mnesarchus” - 10/15/2019keyboard_arrow_down
        • 2.24.1. Changes in this version
      • 2.25. 3.4.2 - “Mnesarchus” - 09/17/2019keyboard_arrow_down
        • 2.25.1. Changes in this version
      • 2.26. 3.4.1 - “Mnesarchus” - 08/12/2019keyboard_arrow_down
        • 2.26.1. Changes in this version
      • 2.27. 3.4.0 - “Mnesarchus” - 07/23/2019keyboard_arrow_down
        • 2.27.1. Changes in this version
      • 2.28. 3.3.0 - “Panaetius” - 05/13/2019keyboard_arrow_down
        • 2.28.1. Changes in this version
      • 2.29. 3.2.0 - “Hierocles” - 03/29/2019keyboard_arrow_down
        • 2.29.1. Changes in this version
      • 2.30. 3.1.0 - “Diodotus ” - 01/08/2019keyboard_arrow_down
        • 2.30.1. Changes in this version
      • 2.31. 3.0.0 - “Posidonius” - 11/21/2018keyboard_arrow_down
        • 2.31.1. Changes in this version
      • 2.32. 2.7.0 - “Eratosthenes” - 07/02/2018keyboard_arrow_down
        • 2.32.1. Changes in this version
      • 2.33. 2.6.0 - “Cleomedes” - 06/01/2018keyboard_arrow_down
        • 2.33.1. Changes in this version
      • 2.34. 2.5.0 - “Theodosius” - 04/20/2018keyboard_arrow_down
        • 2.34.1. Changes in this version
      • 2.35. 2.4.0 - “Aratus” - 03/11/2018keyboard_arrow_down
        • 2.35.1. Changes in this version
      • 2.36. 2.3.0 - “Epictetus” - 02/15/2018keyboard_arrow_down
        • 2.36.1. Changes in this version
      • 2.37. 2.2.0 - “Chrysippus” - 12/21/2017keyboard_arrow_down
        • 2.37.1. Changes in this version
      • 2.38. 2.1.0 - “Cleanthes” - 11/01/2017keyboard_arrow_down
        • 2.38.1. Changes in this version
      • 2.39. 2.0.0 - “Aristotle” - 01/17/2017keyboard_arrow_down
        • 2.39.1. Changes in this version
        • 2.39.2. Changes in the version
      • 2.40. 1.2.1 - “Anaximander” - 05/05/2015keyboard_arrow_down
        • 2.40.1. Changes in this version
      • 2.41. 1.2.0 - “Anaximander” - 02/09/2015keyboard_arrow_down
        • 2.41.1. Changes in this version
      • 2.42. 1.1.5 - “Pythagoras” - 12/15/2014keyboard_arrow_down
        • 2.42.1. Changes in this version
      • 2.43. 1.1.4 - “Pythagoras” - 06/30/2014keyboard_arrow_down
        • 2.43.1. Changes in this version
      • 2.44. 1.1.3 - “Pythagoras” - 04/29/2014keyboard_arrow_down
        • 2.44.1. Changes in this version
      • 2.45. 1.1.2 - “Pythagoras” - 02/03/2014keyboard_arrow_down
        • 2.45.1. About
        • 2.45.2. Changes in this version
      • 2.46. 1.1.1 - “Pythagoras” - 01/07/2014keyboard_arrow_down
        • 2.46.1. About
        • 2.46.2. Changes in this version
      • 2.47. 1.1.0 - “Pythagoras” - 09/16/2013keyboard_arrow_down
        • 2.47.1. About
        • 2.47.2. Changes in this version
      • 2.48. 1.0.1 SR1 - “Zeno” - 09/11/2013keyboard_arrow_down
        • 2.48.1. About
        • 2.48.2. Changes in this version
      • 2.49. 1.0.1 - “Zeno” - 07/08/2013keyboard_arrow_down
        • 2.49.1. About
        • 2.49.2. Changes in this version
      • 2.50. 1.0.0 - “Zeno” - 06/10/2013keyboard_arrow_down
        • 2.50.1. About
        • 2.50.2. Changes in this version
      • 2.51. 0.7.4 - 03/18/2013keyboard_arrow_down
        • 2.51.1. Changes in this version
      • 2.52. 0.7.3 - 02/11/2013keyboard_arrow_down
        • 2.52.1. Changes in this version
      • 2.53. 0.7.2 - 01/14/2013keyboard_arrow_down
        • 2.53.1. Changes in this version
      • 2.54. 0.7.1 - 10/15/2012keyboard_arrow_down
        • 2.54.1. Changes in this version
      • 2.55. 0.7.0 - 09/04/2012keyboard_arrow_down
        • 2.55.1. Changes in this version
      • 2.56. 0.6.66 - 07/02/2012keyboard_arrow_down
        • 2.56.1. Changes in this version
      • 2.57. 0.6.5 - 06/08/2012keyboard_arrow_down
        • 2.57.1. Changes in this version
      • 2.58. 0.6.0 - 01/16/2012keyboard_arrow_down
        • 2.58.1. Changes in this version
      • 2.59. 0.5.2 - 11/14/2011keyboard_arrow_down
        • 2.59.1. Changes in this version
      • 2.60. 0.5.1 - 10/01/2011keyboard_arrow_down
        • 2.60.1. Changes in this version
      • 2.61. 0.5.0 - 08/01/2011keyboard_arrow_down
        • 2.61.1. Changes in this version
      • 2.62. 0.4.2 - 05/26/2011keyboard_arrow_down
        • 2.62.1. Changes in this version
      • 2.63. 0.4.1 - 05/07/2011keyboard_arrow_down
        • 2.63.1. Changes in this version
      • 2.64. 0.4.0 - 04/22/2011keyboard_arrow_down
        • 2.64.1. Changes in this version
      • 2.65. 0.3.2 - 02/26/2011keyboard_arrow_down
        • 2.65.1. Changes in this version
      • 2.66. 0.3.1 - 02/22/2011keyboard_arrow_down
        • 2.66.1. Changes in this version
      • 2.67. 0.2.0 - 11/11/2010keyboard_arrow_down
        • 2.67.1. Changes in this version
      • 2.68. 0.1.0 - 07/26/2010keyboard_arrow_down
        • 2.68.1. Changes in this version
    • 3. Upgrading your QuasarDB installationkeyboard_arrow_down
      • 3.1. From 3.7 to 3.8keyboard_arrow_down
        • 3.1.1. Recommended procedure
        • 3.1.2. Licenses
        • 3.1.3. Client and daemon
        • 3.1.4. Persistence
        • 3.1.5. Network
      • 3.2. From 3.6 to 3.7keyboard_arrow_down
        • 3.2.1. Recommended procedure
        • 3.2.2. Client code
        • 3.2.3. Licenses
        • 3.2.4. Persistence
        • 3.2.5. Network
      • 3.3. From 3.5 to 3.6keyboard_arrow_down
        • 3.3.1. Recommended procedure
        • 3.3.2. Configuration
        • 3.3.3. Licenses
        • 3.3.4. Persistence
        • 3.3.5. Network
    • 4. Licensekeyboard_arrow_down
      • 4.1. Usage
      • 4.2. License file
      • 4.3. Expiration
      • 4.4. Scope of the licensed rightskeyboard_arrow_down
        • 4.4.1. Software Use
        • 4.4.2. Updates and Upgrades
        • 4.4.3. Runtime programs
        • 4.4.4. Back-up copies
      • 4.5. Use restrictionskeyboard_arrow_down
        • 4.5.1. Software modification and reverse engineering
        • 4.5.2. Interoperability
      • 4.6. Third party software
      • 4.7. Limitation of liability
      • 4.8. Indemnifications
      • 4.9. Intellectual property and ownership
    • 5. Credits

Internals¶

  • 1. Transactions
    • 1.1. Overview
    • 1.2. Characteristics
    • 1.3. Design
    • 1.4. Batch or transaction
  • 2. Clustering
    • 2.1. What is a Cluster?
    • 2.2. Stabilization
    • 2.3. Adding a Node to a Cluster
    • 2.4. Removing a Node from a Cluster
    • 2.5. Recovering from Node Failure
    • 2.6. Nodes IDs
  • 3. Data Storage
    • 3.1. Where are Entries Stored in the Cluster?
    • 3.2. Where are Entries Stored in a Node?
    • 3.3. Cache
    • 3.4. Data Migration
    • 3.5. Data replication
    • 3.6. Data trimming
  • 4. Data Transfer
    • 4.1. Designed for Concurrency
    • 4.2. Guarantees
    • 4.3. The Transfer Process
    • 4.4. Failure Cases
    • 4.5. Data Conflicts
  • 5. Change Stream
    • 5.1. Purpose
    • 5.2. Recorded information
    • 5.3. Update types
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