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我正在測試性能cassandra vs mysql，我不明白爲什麼mysql在同一個ubuntu中比cassandra更快。這是無聊嗎？注意：cassandra正在單個節點中運行。NoSQL cassandra問題
這裏我的測試和時間：
時報：
[email protected]:~/x$ time python insert_mysql.py
real 0m21.543s
user 0m6.688s
sys 0m2.016s
[email protected]:~/x$ time python insert_cassandra.py
real 1m15.157s
user 0m14.293s
sys 0m4.108s
[email protected]:~/x$
卡桑德拉腳本：
#!/usr/bin/python
import cql
import random
db = cql.connect('localhost', 9160, 'mykeyspace', cql_version='3.0.0')
cursor = db.cursor()
i = 1
while(i < 200001):
producte = random.randint(0,100)
color = random.randint(0,100)
preu = random.randint(100,1000)
cursor.execute('''INSERT INTO pintura (id, producte, color, preu)
VALUES (%s, %s, %s, %s)''' % (i, producte, color, preu))
i += 1
# Commit your changes in the database
db.commit()
# disconnect from server
db.close()
的MySQL腳本：
#!/usr/bin/python
import MySQLdb
import random
# Open database connection
db = MySQLdb.connect("localhost","root","pass","test")
# prepare a cursor object using cursor() method
cursor = db.cursor()
#SQL query to INSERT a record into the table prova.
i = 1
while(i < 200001):
producte = random.randint(0,100)
color = random.randint(0,100)
preu = random.randint(100,1000)
cursor.execute('''INSERT INTO pintura (id, producte, color, preu)
VALUES (%s, %s, %s, %s)''' % (i, producte, color, preu))
i += 1
# Commit your changes in the database
db.commit()
# disconnect from server
db.close()
DDL MySQL的：
mysql> create table pintura (
-> id int primary key,
-> producte int,
-> color int,
-> preu int);
Query OK, 0 rows affected (0.24 sec)
mysql> create index i2 on pintura(producte);
Query OK, 0 rows affected (0.12 sec)
Records: 0 Duplicates: 0 Warnings: 0
mysql> create index i1 on pintura(color);
Query OK, 0 rows affected (0.07 sec)
Records: 0 Duplicates: 0 Warnings: 0
DDL的卡桑德拉：
cqlsh:mykeyspace> create table pintura (
... id int primary key,
... producte int,
... color int,
... preu int);
cqlsh:mykeyspace> create index i1 on pintura (producte);
cqlsh:mykeyspace> create index i2 on pintura (color);
蘋果和桔子。 ..兩個不同的dbs，兩個完全不同的接口機制（即使兩者之間的代碼本質上相同）等等...... –
http://www.datastax.com/dev/blog/how-not-to-benchmark-cassandra – RussS