回复： Data Loss irreparabley so

Due to the tombstone,we have set GC_GRACE_SECONDS to 6 hours.And for a huge table with 4T size,repair is a hard thing for us. -- 原始邮件 -- 发件人: "kurt";<k...@instaclustr.com>; 发送时间: 2017年8月3日(星期四) 中午12:08 收件人: "User"<user@cassandra.apa

Re: Data Loss irreparabley so

You should run repairs every GC_GRACE_SECONDS. If a node is overloaded/goes down, you should run repairs. LOCAL_QUORUM will somewhat maintain consistency within a DC, but certainly doesn't mean you can get away without running repairs. You need to run repairs even if you are using QUORUM or ONE.​

回复： Data Loss irreparabley so

-- 发件人: "Jon Haddad";<jonathan.had...@gmail.com>; 发送时间: 2017年7月28日(星期五) 凌晨1:37 收件人: "user"<user@cassandra.apache.org>; 主题: Re: Data Loss irreparabley so We (The Last Pickle) maintain an open source tool to help manage repairs across your clusters called R

Re: Data Loss irreparabley so

We (The Last Pickle) maintain an open source tool to help manage repairs across your clusters called Reaper. It’s a lot easier to set up and manage than trying to manage it through cron. http://thelastpickle.com/reaper.html > On Jul 27, 2017, at 12:38 AM,

Re: Data Loss irreparabley so

In that vein, Cassandra support Auto compaction and incremental repair. Does this mean I have to set up cron jobs on each node to do a nodetool repair or is this taken care of by Cassandra anyways? How often should I run nodetool repair Greetings Daniel Jeff Jirsa schrieb am

Re: Data Loss irreparabley so

On 2017-07-25 15:49 (-0700), Roger Warner wrote: > This is a quick informational question. I know that Cassandra can detect > failures of nodes and repair them given replication and multiple DC. > > My question is can Cassandra tell if data was lost after a failure

Re: Data Loss irreparabley so

Cassandra doesn't do any automatic repairing. It can tell if your data is inconsistent, however it's really up to you to manage consistency through repairs and choice of consistency level for queries. If you lose a node, you have to manually repair the cluster after replacing the node, but really

Data Loss irreparabley so

This is a quick informational question. I know that Cassandra can detect failures of nodes and repair them given replication and multiple DC. My question is can Cassandra tell if data was lost after a failure and node(s) “fixed” and resumed operation? If so where would it log or flag it?