Created
August 5, 2016 06:38
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Batch insert python script. It is using the python driver provided by Datastax
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#!/usr/bin/env python | |
from cassandra.cluster import Cluster | |
from cassandra.query import * | |
from cassandra import * | |
import hashlib | |
import sys | |
KEYSPACE = 'test' | |
TABLE = 'user' | |
BATCH_SIZE = 1000 | |
cluster = Cluster() | |
session = cluster.connect(KEYSPACE) | |
def getHash(val): | |
return hashlib.sha256(str(val)).hexdigest() | |
def batchInsert(start, num): | |
insert_q = session.prepare("insert into test.user (user_id, fname, lname, number) values (?, ?, ?, ?)") | |
for i in range(start, num): | |
batch = BatchStatement() | |
for j in range(1, BATCH_SIZE + 1): | |
hashval = getHash(j) | |
batch.add(insert_q, (i, hashval, hashval, i + j)) | |
try: | |
session.execute(batch) | |
except WriteTimeout as e: | |
print "write timeout occurred." | |
if __name__ == "__main__": | |
start = int(sys.argv[1]) | |
num = int(sys.argv[2]) | |
batchInsert(start, num) |
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Setup
See: Installation
install dependencies
To install cassandra driver you can use pip