0
我們正在以每個租戶一個數據庫的方式設計一個SaaS系統。當新的租戶註冊時，會創建一個新的數據庫，並需要設置數據庫結構（方案，掛鉤，功能和系統數據）。如何將數據庫結構從模型數據庫複製到新數據庫？
現在，我想到了兩種解決方案：從模型DB複製/複製到新數據庫或基於SQL腳本設置新數據庫。我對OrientDB很新鮮，所以我重視你的任何建議。
在此先感謝。
A
回答
0
我勸你這些選項：
創建的第一個數據庫（我用下面的
OSQL腳本）：connect remote:localhost/BatchTest root root CREATE CLASS Customer EXTENDS V CREATE PROPERTY Customer.customerID INTEGER CREATE PROPERTY Customer.State STRING CREATE CLASS Store EXTENDS V CREATE PROPERTY Store.storeID INTEGER CREATE PROPERTY Store.State STRING CREATE PROPERTY Store.Zip INTEGER CREATE CLASS transaction EXTENDS E CREATE PROPERTY transaction.amt DOUBLE CREATE PROPERTY transaction.storeID INTEGER CREATE PROPERTY transaction.customerID INTEGER數據集：
orientdb {db=BatchTest}> select from v ----+-----+--------+----------+-----+---------------+-------+----+-------------- # |@RID |@CLASS |customerID|State|out_transaction|storeID|Zip |in_transaction ----+-----+--------+----------+-----+---------------+-------+----+-------------- 0 |#12:0|Customer|1 |NY |[size=4] |null |null|null 1 |#12:1|Customer|2 |NJ |[size=2] |null |null|null 2 |#12:2|Customer|3 |PA |[size=2] |null |null|null 3 |#12:3|Customer|4 |NY |[size=4] |null |null|null 4 |#12:4|Customer|5 |NY |[size=2] |null |null|null 5 |#13:0|Store |null |NY |null |1 |1 |[size=4] 6 |#13:1|Store |null |NJ |null |2 |3 |[size=6] 7 |#13:2|Store |null |NY |null |3 |2 |[size=4] ----+-----+--------+----------+-----+---------------+-------+----+--------------類/記錄：
orientdb {db=BatchTest}> list classes CLASSES ----------------------------------------------+------------------------------------+------------+----------------+ NAME | SUPERCLASS | CLUSTERS | RECORDS | ----------------------------------------------+------------------------------------+------------+----------------+ _studio | | 11 | 1 | Customer | [V] | 12 | 5 | E | | 10 | 0 | OFunction | | 6 | 0 | OIdentity | | - | 0 | ORestricted | | - | 0 | ORIDs | | 8 | 0 | ORole | [OIdentity] | 4 | 3 | OSchedule | | 7 | 0 | OTriggered | | - | 0 | OUser | [OIdentity] | 5 | 3 | Store | [V] | 13 | 3 | transaction | [E] | 14 | 14 | V | | 9 | 0 | ----------------------------------------------+------------------------------------+------------+----------------+ TOTAL = 14 29 | ----------------------------------------------+------------------------------------+------------+----------------+
我們只結構不復制數據集，您可以：
- 創建一些新的空數據庫（每個用戶，組，...）和執行
OSQL腳本每個數據庫只創建類/屬性; - 導出沒有數據集的數據庫。
如果您選擇第二種情況，可以使用帶有相關參數的EXPORT和IMPORT命令。
連接到數據庫導出不記錄的結構（
-includeRecords=false）：orientdb {db=BatchTest}> export database C:/export/destination/path/exportTest.gz -includeRecords=false Exporting current database to: database C:/export/destination/path/exportTest.gz -includeRecords=false in GZipped JSON format ... Started export of database 'BatchTest' to C:/destination/path/exportTest.gz... Exporting database info...OK Exporting clusters...OK (15 clusters) Exporting schema...OK (14 classes) Exporting index info... - Index OUser.name...OK - Index dictionary...OK - Index ORole.name...OK OK (3 indexes) Exporting manual indexes content... - Exporting index dictionary ...OK (entries=0) OK (1 manual indexes) Database export completed in 55ms創建一個新的空數據庫：
orientdb> create database remote:localhost/importTest root root plocal Creating database [remote:localhost/importTest] using the storage type [plocal]... Connecting to database [remote:localhost/importTest] with user 'admin'...OK Database created successfully. Current database is: remote:localhost/importTest導入導出的結構：
orientdb {db=importTest}> import database C:/path/to/exportTest.gz Importing database database C:/path/to/exportTest.gz... Started import of database 'remote:localhost/importTest' from C:/path/to/exportTest.gz... Non merge mode (-merge=false): removing all default non security classes - Class E was removed. - Class V was removed. - Class ORestricted was removed. - Class OTriggered was removed. - Class OSchedule was removed. - Class ORIDs was removed. - Class OFunction was removed. Removed 7 classes. Importing database info...OK Importing clusters... - Creating cluster 'internal'...OK, assigned id=0 - Creating cluster 'default'...OK, assigned id=3 - Creating cluster 'orole'...OK, assigned id=4 - Creating cluster 'ouser'...OK, assigned id=5 - Creating cluster 'ofunction'...OK, assigned id=6 - Creating cluster 'oschedule'...OK, assigned id=7 - Creating cluster 'orids'...OK, assigned id=8 - Creating cluster 'v'...OK, assigned id=9 - Creating cluster 'e'...OK, assigned id=10 - Creating cluster '_studio'...OK, assigned id=11 - Creating cluster 'customer'...OK, assigned id=12 - Creating cluster 'store'...OK, assigned id=13 - Creating cluster 'transaction'...OK, assigned id=14 Rebuilding indexes of truncated clusters ... Done 2 indexes were rebuilt. Done. Imported 13 clusters Importing database schema...OK (14 classes) Importing indexes ... - Index 'OUser.name'...OK - Index 'dictionary'...OK - Index 'ORole.name'...OK Done. Created 3 indexes. Importing manual index entries... - Index 'dictionary'...OK (0 entries) Done. Imported 1 indexes. Rebuild of stale indexes... Stale indexes were rebuilt... Deleting RID Mapping table...OK Database import completed in 7501 ms orientdb {db=importTest}> list classes結構：
CLASSES ----------------------------------------------+------------------------------------+------------+----------------+ NAME | SUPERCLASS | CLUSTERS | RECORDS | ----------------------------------------------+------------------------------------+------------+----------------+ _studio | | 11 | 0 | Customer | [V] | 12 | 0 | E | | 10 | 0 | OFunction | | 6 | 0 | OIdentity | | - | 0 | ORestricted | | - | 0 | ORIDs | | 8 | 0 | ORole | [OIdentity] | 4 | 0 | OSchedule | | 7 | 0 | OTriggered | | - | 0 | OUser | [OIdentity] | 5 | 0 | Store | [V] | 13 | 0 | transaction | [E] | 14 | 0 | V | | 9 | 0 | ----------------------------------------------+------------------------------------+------------+----------------+ TOTAL = 14 0 | ----------------------------------------------+------------------------------------+------------+----------------+數據集：
orientdb {db=importTest}> select from v 0 item(s) found. Query executed in 0.004 sec(s).你可以有很多的參數（official OrientDB documentation）自定義導出的數據庫。
希望它可以幫助
相關問題
- 1. 將數據從舊數據庫複製到新結構的新數據
- 2. 複製數據庫到一個新的數據庫，包括結構和數據
- 3. 如何將數據庫從SD卡複製到//數據庫
- 4. 將數據庫1中的數據複製到數據庫2
- 5. 從舊數據庫複製到Couchdb中的新數據庫
- 6. 將單個表從數據庫複製到數據庫
- 7. 將數據庫複製到另一個數據庫與其他結構
- 8. 從舊的數據庫結構導出到新的數據庫結構
- 9. 數據庫結構關係數據庫
- 10. 數據庫數據庫結構
- 11. 使用LinqToSql將數據庫數據複製到新數據庫中
- 12. 如何將數據庫結構從數據庫導出到遷移文件中？
- 13. 模擬數據庫結構
- 14. 從另一個數據庫備份恢復模型數據庫
- 15. 將數據從本地數據庫複製到遠程數據庫
- 16. 將數據從一個數據庫表複製到另一個數據庫表？
- 17. 將數據從一個數據庫複製到另一個數據庫
- 18. 將數據從一個數據庫複製到另一個數據庫
- 19. 將表格數據從一個數據庫複製到另一個數據庫
- 20. 將數據從一個數據庫複製到另一個數據庫
- 21. 將數據從一個數據庫複製到另一個數據庫
- 22. 將數據從多個數據庫複製到單個數據庫
- 23. Django：將數據從一個數據庫複製到另一個數據庫
- 24. 將數據從MSSQL數據庫複製到使用Python的Postgresql數據庫
- 25. 訪問將數據從一個數據庫複製到另一個數據庫
- 26. 將數據從一個數據庫複製到另一個數據庫
- 27. 將一列數據從一個數據庫複製到另一個數據庫
- 28. 複製數據庫的數據庫
- 29. 將新記錄從一個數據庫複製到另一個數據庫
- 30. 複製現有的數據庫到新的數據庫
嗨@LucaS。謝謝。如果數據庫複製必須在運行時自動完成（而新用戶在線註冊），則必須選擇CASE 1 - 「OSQL腳本」。你的意思是？您知道，我們不希望爲每個新用戶進行離線和手動操作，這會導致錯誤的UE和巨大的成本。 – Sunrise