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--- en:dpi:qoe_analytics:implementation_administration:installation_update:update [2025/10/29 07:15] – created elena.krasnobryzh
+++ en:dpi:qoe_analytics:implementation_administration:installation_update:update [2025/12/19 08:41] (current) – [Update] elena.krasnobryzh
@@ Line 9: / Line 9: @@
   - Run the script ''fastor-rpm_install.sh'': <code>source <(curl https://vasexperts.ru/install/fastor-rpm_install.sh)</code>
+<note tip>
+In some systems, the database may start very slowly (from several minutes to tens of minutes, especially in systems with long data retention), and during the update an error like
+<code>ERROR: while updating DB scheme</code>
+may occur.
+Wait for the database to start. You can check the startup status using tail logs located at ''/var/log/clickhouse-server/clickhouse-server.log'', or try to start the clickhouse-client — if a connection is established, the database has started and is ready for connections.
+After the database starts, run the command
+<code>fastor-db-scheme</code>
+This ensures that the schema is updated in case it didn’t complete due to a long database restart.
+</note>
 ===== Update on CentOS 7 =====
 <note warning>**Attention!** This instruction is relevant **only for CentOS 7**. If you are using CentOS 8 or VEOS, ignore this instruction.</note>

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