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From Jacob Shadix <jacobsha...@gmail.com>
Subject Re: 回复: data loss in different DC
Date Thu, 28 Sep 2017 12:49:00 GMT
How often are you running repairs?

-- Jacob Shadix

On Thu, Sep 28, 2017 at 7:53 AM, Reynald Bourtembourg <
reynald.bourtembourg@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";<doanduyhai@gmail.com> <doanduyhai@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 <2535053@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
>>
>
>
>

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