Created
July 11, 2012 01:40
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practise for pycassa and multiprocessing
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# !/usr/bin/python | |
# -*- encoding: utf-8 -*- | |
import pycassa | |
from multiprocessing import Pool | |
cassa = pycassa.ConnectionPool('test', server_list=['10.1.1.41']) | |
cf = pycassa.ColumnFamily(cassa, 'data') | |
insert_count = 1000000 | |
del_count = 10000 | |
insert_value = 'i' | |
update_value = 'u' | |
for i in range(1023): | |
insert_value += 'i' | |
update_value += 'u' | |
def insert(arr=()): | |
cf.insert(arr[0], {'c1' : arr[1]}) | |
def delete(key): | |
cf.remove(key) | |
def process_insert(pool, start, count): | |
pool.map(insert, [(str(i), insert_value) for i in range(start, start + count)]) | |
def process_del(pool): | |
pool.map(delete, [str(i) for i in range(del_count)]) | |
def process_update(pool): | |
pool.map(insert, [(str(i), update_value) for i in range(100000)]) | |
def test(key, value): | |
cf.insert(key, {'c1' : value}) | |
print cf.get(key) | |
if __name__ == '__main__': | |
# pool = Pool(8) | |
# for i in range(10): | |
# process_insert(pool, 0, 1000000) | |
# process_del(pool) | |
# process_insert(pool, 1000000, 100000) | |
# process_update(pool) | |
# pool.close() | |
# pool.join() | |
for i in range(1100000): | |
try: | |
value = cf.get(str(i))['c1'] | |
l = len(value) | |
if l != 1024: | |
print str(i), 'wrong' | |
break | |
print str(i),l, value[0] | |
except Exception, e: | |
print str(i),'del' |
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