我正在尝试使用cassandra-stress测试我的3个Cassandra(3.11.3.5)群集节点。 目前,我正在运行3个节点和1台运行cassandra-tool的计算机,一切都在openvpn网络上。
我已经在这里创建了.yaml用户配置文件测试文件:
### DML ###
# Keyspace Name
keyspace: mykeyspace
# The CQL for creating a keyspace (optional if it already exists)
keyspace_definition: |
CREATE KEYSPACE mykeyspace WITH replication = {'class': 'NetworkTopologyStrategy', 'DC1': '2'} AND durable_writes = false;
# Table name
table: mytable
# The CQL for creating a table you wish to stress (optional if it already exists)
table_definition: |
CREATE TABLE mytable (
id bigint,
type int,
txt text,
event_datetime timestamp,
bigtxt text,
page int,
PRIMARY KEY ((id, type), page, event_datetime)
) WITH CLUSTERING ORDER BY (page DESC, event_datetime DESC)
AND bloom_filter_fp_chance = 0.01
AND caching = {'keys': 'ALL', 'rows_per_partition': 'NONE'}
AND comment = 'ciao'
AND compaction = {'class': 'org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy', 'max_threshold': '32', 'min_threshold': '4'}
AND compression = {'chunk_length_in_kb': '64', 'class': 'org.apache.cassandra.io.compress.LZ4Compressor'}
AND crc_check_chance = 1.0
AND dclocal_read_repair_chance = 0.1
AND default_time_to_live = 0
AND gc_grace_seconds = 90000
AND max_index_interval = 2048
AND memtable_flush_period_in_ms = 0
AND min_index_interval = 128
AND read_repair_chance = 0.0
AND speculative_retry = '99PERCENTILE';
### Column Distribution Specifications ###
columnspec:
- name: id
size: gaussian(1..1000)
population: gaussian(1..500k)
- name: type
size: gaussian(0..5)
population: gaussian(1..5)
- name: event_datetime
cluster: fixed(1)
- name: page
size: ~exp(1..20)
population: ~exp(1..20)
cluster: fixed(1)
- name: txt
size: exp(30..1k)
- name: bigtxt
size: gaussian(10k..30M)
### Batch Ratio Distribution Specifications ###
insert:
partitions: fixed(1) # Our partition key is the domain so only insert one per batch
select: fixed(1)/1
batchtype: UNLOGGED # Unlogged batches
queries:
pages:
cql: select id, page, type, txt, event_datetime, bigtxt from mytable where id = ? and type = ? and page=? limit 10;
fields: multirow
到目前为止,我运行的命令是对此命令的修改:
cassandra-stress user n=30 profile=./myprofile.yml ops\(insert=1\) -rate threads=10 -node 10.5.0.1,10.5.0.6,10.5.0.8
我已更改的内容:
我总是会遇到一些错误,例如:
com.datastax.driver.core.exceptions.NoHostAvailableException: All host(s) tried for query failed (tried: 10.5.0.1/10.5.0.1:9042 (com.datastax.driver.core.exceptions.OperationTimedOutException: [10.5.0.1/10.5.0.1] Timed out waiting for server response), 10.5.0.6/10.5.0.6:9042 (com.datastax.driver.core.exceptions.OperationTimedOutException: [10.5.0.6/10.5.0.6] Timed out waiting for server response), 10.5.0.8/10.5.0.8:9042 (com.datastax.driver.core.exceptions.OperationTimedOutException: [10.5.0.8/10.5.0.8] Timed out waiting for server response))
在升温阶段,我也会得到这些错误。
运行结果类似于:
Results:
Op rate : 0 op/s [insert: 1 op/s]
Partition rate : 0 pk/s [insert: 1 pk/s]
Row rate : 2 row/s [insert: 3 row/s]
Latency mean : 38172.3 ms [insert: 38,172.3 ms]
Latency median : 37279.0 ms [insert: 37,279.0 ms]
Latency 95th percentile : 59190.0 ms [insert: 59,190.0 ms]
Latency 99th percentile : 59458.5 ms [insert: 59,458.5 ms]
Latency 99.9th percentile : 59458.5 ms [insert: 59,458.5 ms]
Latency max : 59458.5 ms [insert: 59,458.5 ms]
Total partitions : 30 [insert: 30]
Total errors : 0 [insert: 0]
Total GC count : 2
Total GC memory : 3.396 GiB
Total GC time : 0.2 seconds
Avg GC time : 117.0 ms
StdDev GC time : 0.0 ms
Total operation time : 00:01:04
我不明白的是:
为什么延迟时间与在节点上运行nodetool cfhistograms mykeyspace mytable
时得到的延迟时间完全不同?在节点上,我得到大约200毫秒的等待时间,即99%的写入延迟。可能与cassandra-tool用于将MB的数据发送到协调器所花费的时间有关吗?
为什么在cassandra-tool命令中更改油门/固定速率开关没有看到任何效果?我总是得到1 op / s
如果我有一个生产集群(如测试集群),那么为什么我经常会收到先前的错误,即使它收到了更多的混合工作负载(读入600k和写入1M,也没有这些错误)大约3个小时)?
答案 0 :(得分:0)
我知道这是一个旧线程,但是:
我也在配置Cassandra集群,并且在此过程中有些头疼。
为了生成个人资料,我使用了this reference。
关于异常,如果我是对的,cassandra-stress工具无法连接到集群中的任何节点。
要看的东西:
start_native_transport
设置为true?listen_address
或listen_interface
配置设置为所需的IP地址?默认值为127.0.0.1 这些是我必须更改的一些功能,以便能够远程连接。 希望对您有所帮助。