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利用ycsb测试cassandra性能

WBOY
WBOYoriginal
2016-06-07 15:22:272031parcourir

java 、maven、ycsb 的安装及配置见这篇博客: http://blog.csdn.net/hs794502825/article/details/17309845 本篇博客主要介绍 cassandra 的安装,以及利用 ycsb 对 cassandra 进行基本的测试 在 http://cassandra.apache.org/download/ 上面下载了最新版本的

java 、maven、ycsb 的安装及配置见这篇博客:
http://blog.csdn.net/hs794502825/article/details/17309845

本篇博客主要介绍 cassandra 的安装,以及利用 ycsb 对 cassandra 进行基本的测试
在 http://cassandra.apache.org/download/ 上面下载了最新版本的 apache-cassandra-2.0.3-bin.tar.gz 存放在 /home/hs/program目录下
cd /home/hs/program
tar -zxvf apache-cassandra-2.0.3-bin.tar.gz
然后为 cassandra 设置环境变量
sudo gedit /etc/profile
在文件的最后加入:
#set cassandra environment
export CASSANDRA_HOME=/home/hs/program/apache-cassandra-2.0.3
export PATH=$PATH:$CASSANDRA_HOME/bin:$CASSANDRA_HOME/lib
之后,我就直接以普通用户(hs)执行 cassandra -f
显示了很多错误,大多都是与此相关:
无法生成目录:/var/lib/cassandra/......以及/var/log/cassandra/......

var目录的权限如下:
drwxr-xr-x 13 root root 4096 2013-12-14 21:50
只有所有者root对其有写的权限

cassandra 需要生成数据和日志信息的目录,默认情况下就是
/var/lib/cassandra/ 和 /var/log/cassandra/

然后我就在 hs 用户下执行如下命令:
sudo mkdir /var/lib/cassandra
sudo mkdir /var/log/cassandra

chown -R hs:hs /var/lib/cassandra
chown -R hs:hs /var/log/cassandra

如此一来,hs 就具有写 /var/lib/cassandra/ 和 /var/log/cassandra/ 的权限

在终端1中运行cassandra:
cassandra -f
如果有 Listening for thrift clients... 则说明成功启动 cassandra

在终端2中运行cassandra-cli:
cassandra-cli
显示:
Connected to: "Test Cluster" on 127.0.0.1/9160
Welcome to Cassandra CLI version 2.0.3

The CLI is deprecated and will be removed in Cassandra 3.0.  Consider migrating to cqlsh.
CQL is fully backwards compatible with Thrift data; see http://www.datastax.com/dev/blog/thrift-to-cql3

根据提示我就终止了 cassandra-cli,转而去使用 cqlsh
hs@hs-virtual-machine:~$ cqlsh
Connected to Test Cluster at localhost:9160.
[cqlsh 4.1.0 | Cassandra 2.0.3 | CQL spec 3.1.1 | Thrift protocol 19.38.0]

接下来在创建 keyspace 的时候,出现了如下错误:
cqlsh> create keyspace with strategy_class = 'SimpleStrategy' and strategy_options:replication_factor = '1';
Bad Request: line 1:75 mismatched input ':' expecting '='
上面那一行创建 keyspace 的命令我是从 cqlsh 的官网上 copy 过来的,所以我不知道怎么解决,第一次接触 cqlsh

后来还是去使用 cassandra-cli(注意所有的命令都需要以;结束)
create keyspace usertable;
use usertable;
create column family data;

在终端3中运行ycsb:
./bin/ycsb load cassandra-10 -P workloads/workloada -p hosts=localhost -p columnfamily=data > ./my-results/load-cassandra-a

得到如下错误:
Loading workload...
Starting test.
InvalidRequestException(why:unconfigured columnfamily data)
	at org.apache.cassandra.thrift.Cassandra$batch_mutate_result.read(Cassandra.java:20833)
	at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:78)
	at org.apache.cassandra.thrift.Cassandra$Client.recv_batch_mutate(Cassandra.java:964)
	at org.apache.cassandra.thrift.Cassandra$Client.batch_mutate(Cassandra.java:950)
	at com.yahoo.ycsb.db.CassandraClient10.insert(CassandraClient10.java:477)
	at com.yahoo.ycsb.DBWrapper.insert(DBWrapper.java:148)
	at com.yahoo.ycsb.workloads.CoreWorkload.doInsert(CoreWorkload.java:461)
	at com.yahoo.ycsb.ClientThread.run(Client.java:269)

目测是 column family 的创建有问题
所以我在终端2中删除掉该 column family,然后重建
drop column family data;
create column family data with column_type = 'Standard' and comparator = 'UTF8Type';

返回终端3重新运行ycsb:
./bin/ycsb load cassandra-10 -P workloads/workloada -p hosts=localhost -p columnfamily=data > ./my-results/load-cassandra-a

得到如下结果:
YCSB Client 0.1
Command line: -db com.yahoo.ycsb.db.CassandraClient10 -P workloads/workloada -p hosts=localhost -p columnfamily=data -load
[OVERALL], RunTime(ms), 2287.0
[OVERALL], Throughput(ops/sec), 437.25404459991256
[INSERT], Operations, 1000
[INSERT], AverageLatency(us), 1670.687
[INSERT], MinLatency(us), 476
[INSERT], MaxLatency(us), 280228
[INSERT], 95thPercentileLatency(ms), 3
[INSERT], 99thPercentileLatency(ms), 12
[INSERT], Return=0, 1000
......

执行:
./bin/ycsb run cassandra-10 -P workloads/workloada -p hosts=localhost -p columnfamily=data > ./my-results/run-cassandra-a

得到如下结果:
YCSB Client 0.1
Command line: -db com.yahoo.ycsb.db.CassandraClient10 -P workloads/workloada -p hosts=localhost -p columnfamily=data -t
[OVERALL], RunTime(ms), 5574.0
[OVERALL], Throughput(ops/sec), 179.4043774668102
[UPDATE], Operations, 475
[UPDATE], AverageLatency(us), 2095.0547368421053
[UPDATE], MinLatency(us), 327
[UPDATE], MaxLatency(us), 143093
[UPDATE], 95thPercentileLatency(ms), 9
[UPDATE], 99thPercentileLatency(ms), 33
[UPDATE], Return=0, 475
......
[READ], Operations, 525
[READ], AverageLatency(us), 5054.5085714285715
[READ], MinLatency(us), 492
[READ], MaxLatency(us), 674167
[READ], 95thPercentileLatency(ms), 11
[READ], 99thPercentileLatency(ms), 85
[READ], Return=0, 525

下一阶段需要熟悉对 cassandra 的操作,以及使用 cqlsh
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