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
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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Hi Sylvain,
thanks for your answer.
I'd make a test with the stress utility inserting 100 000 rows with 10
columns per row
I use these options: -o insert -t 5 -n 10 -c 10 -d
192.168.1.210,192.168.1.211,...
result: 161 seconds
with MySQL using inserts (after a dump): 1.79 second
Charles
201
There is probably a fair number of things you'd have to make sure you do to
improve the write performance on the Cassandra side (starting by using multiple
threads to do the insertion), but the first thing is probably to start
comparing things
that are at least mildly comparable. If you do inserts
Hi,
Not sure this is the case for your Bad Performance, but you are Meassuring Data
creation and Insertion together. Your Data creation involves Lots of class
casts which are probably quite Slow.
Try
Timing only the b.send Part and See how Long that Takes.
Roland
Am 03.05.2011 um 12:30 schrieb
