======QoE Stor======
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<note>[[en:dpi:qoe|Product Description]]</note>
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<accordion-item title="1. Not working, although everything is installed according to the instructions">
If you have installed and configured everything according to the instructions, but the “QoE Analytics” section in DPIUI2 is empty, here are the steps to follow before contacting technical support.

  - Check the time and timezone settings on the DPIUI2 and QoE Stor servers. Try setting a large period in DPIUI2. If the issue is with the timezone, data will appear. Correct the time settings on the DPIUI2 and QoE Stor servers, and fully restart the servers <wrap em>(If you changed the timezone, you need to [[en:dpi:dpi_components:qoestor:commands#delete_db_schema|delete]] and [[en:dpi:dpi_components:qoestor:commands#create_update_database_schema|recreate the database schema]])</wrap>.
  - On the QoE Stor server, check if the [[en:dpi:dpi_components:qoestor:commands#check_if_the_database_has_been_created|database is created]]. If not, [[en:dpi:dpi_components:qoestor:commands#create_update_database_schema|create it using the command]].
  - On the QoE Stor server, [[en:dpi:dpi_components:qoestor:commands#check_if_there_is_data_in_the_database|check if there is data in the database]]. Alternatively, check how partitions are filling up through the web interface in the QOE ANALYTICS / ADMINISTRATOR / Table Space Information section.
  - Check if the [[en:dpi:dpi_components:qoestor:commands#check_if_receivers_are_running|receivers are running]] and [[en:dpi:dpi_components:qoestor:commands#restarting_receivers_and_configuration|restart the receivers]] if needed.
  - On the QoE Stor server, check the receiver logs in the folder ''/var/qoestor/backend/logs''. There should be no errors in the logs. You should see the rotation of dumps and their writing to the database.
  - On the QoE Stor server, check if ports 1500 and 1501 are being [[en:dpi:dpi_components:qoestor:commands#check_if_the_receivers_are_listening_to_the_ports_and_if_there_is_a_connection|listened to by the receivers]].
  - Restart all receivers as a precaution using the [[en:dpi:dpi_components:qoestor:commands#restarting_receivers_and_configuration|command]].
  - Double-check the [[en:dpi:dpi_components:qoestor:configuration:dpi|IPFIX export settings on the DPI]].
  - On the DPIUI2 server, check the [[en:dpi:dpi_components:dpiui:configuration|GUI connection settings to QoE Stor]].
  - On the QoE Stor server, check if the ClickHouse DBMS is running using the [[en:dpi:dpi_components:qoestor:commands#check_if_the_db_is_working|command]]. Ensure there is enough RAM on the server.
  - On the QoE Stor server, check the ClickHouse logs: <code bash>/var/log/clickhouse-server/clickhouse-server.err.log</code>

If you need to clear all data in the database, on the QoE Stor server:
  - Delete the database using the [[en:dpi:dpi_components:qoestor:commands#delete_db_schema|command]].
  - Recreate the database using the [[en:dpi:dpi_components:qoestor:commands#create_update_database_schema|command]].
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<accordion-item title="2. How to reduce storage period and clear data?">
Data clearing is performed by the DPIUI2 module. 
On the server where DPIUI2 is installed, modify the following parameters in the ''/var/www/html/dpiui2/backend/.env'' file:
<code bash>
QOESTOR_MAIN_LOG_PARTITIONS_LIFE_TIME_HOUR=2
QOESTOR_AGG_LOG_PARTITIONS_LIFE_TIME_DAYS=15
</code>
Restart the service:
<code bash>dpiui2 queue:restart</code>
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