I have understood my error.

I was comparing bulk insert in MySQL with batch_insert in Cassandra
I made this two tests from a remote machine
I have made the same test with one insert per row in MySQL and it took 4mn28s

but the result I have with the stress utility it seems to be abnormal, isn't it?

2011/5/3 mcasandra <mohitanchlia@gmail.com>
Did you do a bulk upload with mysql from the same machine or separate
insert/commit for each row? And did you run inserts from the same machine as
the mysqld server?

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