add: clickhouse related ingestion & read diagrams

Author: Rahul-4480

static/images/blog/clickhouse-benchmarking/clickhouse-cluster-ingestion.png

@@ -0,0 +1,65 @@
+-- Schema
+CREATE TABLE logs
+(
+  `remote_addr` String,
+  `remote_user` String,
+  `runtime` UInt64,
+  `time_local` DateTime,
+  `request_type` String,
+  `request_path` String,
+  `request_protocol` String,
+  `status` UInt64,
+  `size` UInt64,
+  `referer` String,
+  `user_agent` String
+)
+ENGINE = MergeTree
+ORDER BY (toStartOfHour(time_local), status, request_path, remote_addr);
+
+-- Simple Select Queries
+SELECT * FROM logs;
+
+SELECT toStartOfInterval(toDateTime(time_local), INTERVAL 900 second) AS time, count() 
+FROM logs 
+WHERE time_local >= '1548288000' AND time_local <= '1550966400' 
+AND status = 404 AND request_path = '/apple-touch-icon-precomposed.png' 
+AND remote_addr = '2.185.223.153' AND runtime > 4000 
+GROUP BY time 
+ORDER BY time ASC 
+LIMIT 10000;
+
+-- Join Query
+SELECT toStartOfInterval(toDateTime(l.time_local), INTERVAL 900 second) AS time, count() 
+FROM logs l
+JOIN logs_local ll ON l.remote_addr = ll.remote_addr AND l.time_local = ll.time_local
+WHERE l.time_local >= '1548288000' 
+  AND l.time_local <= '1550966400' 
+  AND l.status = 404 
+  AND l.request_path = '/apple-touch-icon-precomposed.png' 
+  AND l.remote_addr = '2.185.223.153' 
+  AND l.runtime > 4000 
+GROUP BY time 
+ORDER BY time ASC 
+LIMIT 10000;
+
+-- Aggregation Queries
+SELECT uniq(remote_addr) AS `unique ips` 
+FROM logs 
+WHERE time_local >= '1548288000' 
+AND time_local <= '1550966400' 
+AND status = 404 
+AND request_path = '/apple-touch-icon-precomposed.png' 
+AND remote_addr = '2.185.223.153' 
+AND runtime > 4000;
+
+SELECT toStartOfInterval(toDateTime(time_local), INTERVAL 900 second) AS time, avg(runtime) AS avg_request_time, quantile(0.99)(runtime) AS 99_runtime 
+FROM logs 
+WHERE time_local >= '1548288000' 
+AND time_local <= '1550966400' 
+AND status = 404 
+AND request_path = '/apple-touch-icon-precomposed.png' 
+AND remote_addr = '2.185.223.153' 
+AND runtime > 4000 
+GROUP BY time 
+ORDER BY time ASC 
+LIMIT 100000;