4 ms·
> This can be impractical if G is a database table that is very large. If this is true, you have no choice, and must run things side by side while you convert
by Groxx 9y ago
> This can be impractical if G is a database table that is very large.
If this is true, you have no choice, and must run things side by side while you convert to G2. Or shut everything down to make the migration atomic, which is increasingly not an option.
- geocar 9y ago> you have no choice It depends on your database. If you imagine a simple postgres or mysql server and an "alter table G..." then you're right. If (however) G1⊂G2 then a document store or a column-based database can usually partition the table somehow.