Thanks Thomas for the reminder,we will watch the system log.
------------------ 原始邮件 ------------------ 发件人: "Steinmaurer, Thomas";<thomas.steinmau...@dynatrace.com>; 发送时间: 2017年9月21日(星期四) 下午5:17 收件人: "user@cassandra.apache.org"<user@cassandra.apache.org>; 主题: RE: network down between DCs Hi, within the default hint window of 3 hours, the hinted handoff mechanism should take care of that, but we have seen that failing from time to time (depending on the load) in 2.1 with some sort of tombstone related issues causing failing requests on the system hints table. So, watch out any sign of hinted handoff troubles in the Cassandra log. Hint storage has been re-written in 3.0+ to flat files, thus tombstone related troubles in that area should be gone. Thomas From: Hannu Kröger [mailto:hkro...@gmail.com] Sent: Donnerstag, 21. September 2017 10:32 To: Peng Xiao <2535...@qq.com>; user@cassandra.apache.org Subject: Re: network down between DCs Hi, That’s correct. You need to run repairs only after a node/DC/connection is down for more then max_hint_window_in_ms. Cheers, Hannu On 21 September 2017 at 11:30:44, Peng Xiao (2535...@qq.com) wrote: Hi there, We have two DCs for a Cassandra Cluster,if the network is down less than 3 hours(default hint window),with my understanding,it will recover automatically,right?Do we need to run repair manually? Thanks, Peng Xiao The contents of this e-mail are intended for the named addressee only. It contains information that may be confidential. Unless you are the named addressee or an authorized designee, you may not copy or use it, or disclose it to anyone else. If you received it in error please notify us immediately and then destroy it. Dynatrace Austria GmbH (registration number FN 91482h) is a company registered in Linz whose registered office is at 4040 Linz, Austria, Freistädterstraße 313
