thevar1able/ClickHouse
1
0
Fork 0
mirror of https://github.com/ClickHouse/ClickHouse.git synced 2024-11-25 17:12:03 +00:00
Code Issues Packages Projects Releases Wiki Activity

Update system.md

Browse Source
This commit is contained in:
Roman Bug 2021-07-29 10:44:44 +03:00 committed by GitHub
parent e0b345d99a
commit 0a3d021f84
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 7 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
docs/en/sql-reference/statements/system.md
View File

@ -311,8 +311,7 @@ One may execute query after:
- Individual replica path `/replicas/replica_name/` loss.
Replica attaches locally found parts and sends info about them to Zookeeper.
Parts present on replica before metadata loss are not re-fetched from other replicas if not being outdated
(so replica restoration does not mean re-downloading all data over the network).
Parts present on a replica before metadata loss are not re-fetched from other ones if not being outdated (so replica restoration does not mean re-downloading all data over the network).
Caveat: parts in all states are moved to `detached/` folder. Parts active before data loss (Committed) are attached.
@ -342,7 +341,12 @@ INSERT INTO test SELECT * FROM numbers(1000);
-- zookeeper_delete_path("/clickhouse/tables/test", recursive=True) <- root loss.
SYSTEM RESTART REPLICA test; -- Table will attach as readonly as metadata is missing.
SYSTEM RESTORE REPLICA test; -- Need to execute on every replica, another way: RESTORE REPLICA test ON CLUSTER cluster
SYSTEM RESTORE REPLICA test; -- Need to execute on every replica.
```
Another way:
```sql
RESTORE REPLICA test ON CLUSTER cluster;
```
### RESTART REPLICAS {#query_language-system-restart-replicas}