How often are you running repairs? -- Jacob Shadix
On Thu, Sep 28, 2017 at 7:53 AM, Reynald Bourtembourg < reynald.bourtembo...@esrf.fr> wrote: > Hi, > > You can write with CL=EACH_QUORUM and read with CL=LOCAL_QUORUM to get > strong consistency. > > Kind regards, > Reynald > > > On 28/09/2017 13:46, Peng Xiao wrote: > > even with CL=QUORUM,there is no guarantee to be sure to read the same data > in DC2,right? > then multi DCs looks make no sense? > > > ------------------ 原始邮件 ------------------ > *发件人:* "DuyHai Doan";<doanduy...@gmail.com> <doanduy...@gmail.com>; > *发送时间:* 2017年9月28日(星期四) 下午5:45 > *收件人:* "user"<user@cassandra.apache.org> <user@cassandra.apache.org>; > *主题:* Re: data loss in different DC > > If you're writing into DC1 with CL = LOCAL_xxx, there is no guarantee to > be sure to read the same data in DC2. Only repair will help you > > On Thu, Sep 28, 2017 at 11:41 AM, Peng Xiao <2535...@qq.com> wrote: > >> Dear All, >> >> We have a cluster with one DC1:RF=3,another DC DC2:RF=1 only for ETL,but >> we found that sometimes we can query records in DC1,while not able not find >> the same record in DC2 with local_quorum.How it happens? >> Could anyone please advise? >> looks we can only run repair to fix it. >> >> Thanks, >> Peng Xiao >> > > >
