我正在尝试使用 spring 将 1500 条记录插入 cassandra 中。我有一个 POJO 列表,其中包含这 1500 条记录,当我调用 saveAll 或插入此数据时,需要 30 秒才能完成此操作。有人可以建议一种方法让我更快地完成这件事吗?我目前正在将 Cassandra 3.11.2 作为单节点测试集群运行。
实体POJO:
package com.samplepoc.pojo;
import static org.springframework.data.cassandra.core.cql.PrimaryKeyType.PARTITIONED;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import org.springframework.data.cassandra.core.mapping.Column;
import org.springframework.data.cassandra.core.mapping.PrimaryKeyColumn;
import org.springframework.data.cassandra.core.mapping.Table;
@Table("health")
public class POJOHealth
{
@PrimaryKeyColumn(type=PARTITIONED)
UUID primkey;
@Column
String col1;
@Column
String col2;
@Column
String col3;
@Column
String col4;
@Column
String col5;
@Column
Date ts;
@Column
boolean stale;
@Column
String col6;
@Column
String col7;
@Column
String col8;
@Column
String col9;
@Column
Map<String,String> data_map = new HashMap<String,String>();
public POJOHealth(
String col1,
String col2,
String col3,
String col4,
String col5,
String col6,
String col7,
String col8,
String col9,
boolean stale,
Date ts,
Map<String,String> data_map
)
{
this.primkey = UUID.randomUUID();
this.col1=col1;
this.col2=col2;
this.col3=col3;
this.col4=col4;
this.col5=col5;
this.col6=col6;
this.col7=col7;
this.col8=col8;
this.col9=col9;
this.ts=ts;
this.data_map = data_map;
this.stale=stale;
}
//getters & setter ommitted
}
持久服务片段:
public void persist(List<POJO> l_POJO)
{
System.out.println("Enter Persist: "+new java.util.Date());
List<l_POJO> l_POJO_stale = repository_name.findBycol1AndStale("sample",false);
System.out.println("Retrieve Old: "+new java.util.Date());
l_POJO_stale.forEach(s -> s.setStale(true));
System.out.println("Set Stale: "+new java.util.Date());
repository_name.saveAll(l_POJO_stale);
System.out.println("Save stale: "+new java.util.Date());
try
{
repository_name.insert(l_POJO);
}
catch (Exception e)
{
System.out.println("Error in persisting new data");
}
System.out.println("Insert complete: "+new java.util.Date());
}