Logstash每次如何从末尾读取日志？

Question

以下是我从logstash输入的conf：

input {
file {
    path => "/usr/local/elk/mos-log/mt.log"
    type => "mos-mt-log"
    codec => multiline {
      pattern => "^\["
      negate => true
      what => "next"
      }
    start_position => "end"
}
file {
    path => "/usr/local/elk/mos-log/rpt.log"
    type => "mos-rpt-log"
    codec => multiline {
      pattern => "^\["
      negate => true
      what => "next"
    }
  start_position => "end"
}}

每当我手动将日志添加到日志中时，Logstash始终会从头到尾读取日志。你如何确保Logstash从最后读取日志？ 字段start_position =＆gt; conf中的“end”不起作用