Duplicate partitioning key performance impact
- by Anshul
I've read in some posts that having duplicate partitioning key can have a performance impact. I've two tables like:
CREATE TABLE "Test1" ( CREATE TABLE "Test2" (
key text, key text,
column1 text, name text,
value text, age text,
PRIMARY KEY (key, column1) ...
) PRIMARY KEY (key, name,age)
)
In Test1 column1 will contain column name and value will contain its corresponding value.The main advantage of Test1 is that I can add any number of column/value pairs to it without altering the table by just providing same partitioning key each time.
Now my question is how will each of these table schema's impact the read/write performance if I've millions of rows and number of columns can be upto 50 in each row. How will it impact the compaction/repair time if I'm writing duplicate entries frequently?
