怎么去做推广seo优化的方法有哪些
- 查找满足指定条件的app_id
- 查询条件: 表名、时间、节点名
- 时间限定: 最好适当放大, 不知道什么原因有点不准
- eventLog的存放路径: spark.history.fs.logDirectory
1. spark-sql
- 先限定时间段;
- 数据是逐行读入的, 但 app_id要按整个文件过滤, 按每个条件打标;
- 按app_id粒度聚合, 查找符合条件的数据;
-- 设定时区
set spark.sql.session.timeZone=GMT+8;-- 创建数据源视图
create temporary view view_name using text options ('path'='hdfs://hdfs-cluster/spark-history/*', 'modifiedAfter'='2023-08-21T08:00:00', 'modifiedBefore'='2023-08-21T14:00:00' );with tmp as ( -- 打标数据selectinput_file_name() as file_name,if( value like '%tbl_name%', 1, 0) as table_name,if( value like '%core-1-7%', 1, 0) as host_01,if( value like '%core-1-10%', 1, 0) as host_02fromview_name
),
tmp2 as ( -- 汇总到app_id粒度selectfile_name,sum(table_name) as table_name,sum(host_01) as host_01,sum(host_02) as host_02fromtmpgroup byfile_name
)
select*
fromtmp2
wheretable_name > 0
order byfile_name
;2. 整文件读取
- 先初步过滤app_id;
- 整个文件读取成一行;
- 按条件进行过滤;
import spark.implicits._// 寻找可能的APP_ID
val sql_create_view ="""|create temporary view view_name using text options ('path'='hdfs://hdfs-cluster/spark-history/*', 'modifiedAfter'='2023-08-21T00:00:00', 'modifiedBefore'='2023-08-21T23:00:00' )|""".stripMargin
val sql_filter_app_id ="""|select| split( input_file_name(), 'history/')[1] as file_name|from| view_name|where| value like '%trandw.dwd_log_app_open_di%'|group by| split( input_file_name(), 'history/')[1]|""".stripMargin
spark.sql(sql_create_view)
val df_app_ids = spark.sql(sql_filter_app_id)
val app_ids = df_app_ids.collect().map(_.getString(0)).mkString(",")// 整个文件读取成一行
val rdd = spark.sparkContext.wholeTextFiles(s"hdfs://hdfs-cluster/spark-history/{${app_ids}}",20).repartition(12)
val df = rdd.toDF("file_name", "value")
df.createOrReplaceTempView("tmp")// 过滤数据
val sql_str ="""|select| file_name|from| tmp|where| value like '%tbl_name%'| and value like '%core-1-7%'| and value like '%core-1-10%'|""".stripMarginspark.sql(sql_str).show(1)