New answers tagged tablespaces
No. For ibdata files you have variable innodb_data_file_path=ibdata1:XXXXM:autoextend you can specify one or more but not for individual table spaces.
By default, PostgreSQL's databases cannot see each other and you cannot query between them. You can query between, or have foreign keys between PostgreSQL schemas. If you want strong multi-tenant client segregation, use distinct databases.
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