Re: 答复:

[Ryan Svihla <rs...@datastax.com>]

Every time I've heard this but one this has been clock skew  (and that was
swallowed exceptions), however it can just be you have a test that is prone
to race conditions (delete followed by an immediate select with a low
consistency level), without more detail it's hard to say.

I'd check the nodes for time skew by running ntpdate on each node, and make
sure ntpd is pointing to the same servers.

On Wed, Dec 24, 2014 at 2:53 AM, 鄢来琼 <la...@gtafe.com> wrote:

>  Yeah, I also have the question.
>
> My solution is not delete the row, but insert the right row to a new table.
>
>
>
> Thanks & Regards,
>
> *Peter YAN*
>
>
>
> *发件人:* Sávio S. Teles de Oliveira [mailto:savio.teles@cuia.com.br]
> *发送时间:* 2014年8月26日 4:25
> *收件人:* user@cassandra.apache.org
> *主题:*
>
>
>
> We're using cassandra 2.0.9 with datastax java cassandra driver 2.0.0 in a
> cluster of eight nodes.
>
> We're doing an insert and after a delete like:
>
> delete from *column_family_name* where *id* = value
>
> Immediatly select to check whether the DELETE was successful. Sometimes
> the value still there!!
>
>
>
> Any suggestions?
>
> --
>
> Atenciosamente,
> Sávio S. Teles de Oliveira
>
> voice: +55 62 9136 6996
> http://br.linkedin.com/in/savioteles
>
> Mestrando em Ciências da Computação - UFG
> Arquiteto de Software
>
> CUIA Internet Brasil
>



-- 

[image: datastax_logo.png] <http://www.datastax.com/>

Ryan Svihla

Solution Architect

[image: twitter.png] <https://twitter.com/foundev> [image: linkedin.png]
<http://www.linkedin.com/pub/ryan-svihla/12/621/727/>

DataStax is the fastest, most scalable distributed database technology,
delivering Apache Cassandra to the world’s most innovative enterprises.
Datastax is built to be agile, always-on, and predictably scalable to any
size. With more than 500 customers in 45 countries, DataStax is the
database technology and transactional backbone of choice for the worlds
most innovative companies such as Netflix, Adobe, Intuit, and eBay.

Re: 答复:

[Ken Hancock <ke...@schange.com>]

Better yet, if you're using a client where you can pass the time in, you
can validate it is indeed clock skew.  Do all your writes with timestamp =
0, all your deletes with timestamp = 1.

On Wed, Dec 24, 2014 at 7:47 AM, Ryan Svihla <rs...@datastax.com> wrote:

> Every time I've heard this but one this has been clock skew  (and that was
> swallowed exceptions), however it can just be you have a test that is prone
> to race conditions (delete followed by an immediate select with a low
> consistency level), without more detail it's hard to say.
>
> I'd check the nodes for time skew by running ntpdate on each node, and
> make sure ntpd is pointing to the same servers.
>
> On Wed, Dec 24, 2014 at 2:53 AM, 鄢来琼 <la...@gtafe.com> wrote:
>
>>  Yeah, I also have the question.
>>
>> My solution is not delete the row, but insert the right row to a new
>> table.
>>
>>
>>
>> Thanks & Regards,
>>
>> *Peter YAN*
>>
>>
>>
>> *发件人:* Sávio S. Teles de Oliveira [mailto:savio.teles@cuia.com.br]
>> *发送时间:* 2014年8月26日 4:25
>> *收件人:* user@cassandra.apache.org
>> *主题:*
>>
>>
>>
>> We're using cassandra 2.0.9 with datastax java cassandra driver 2.0.0 in
>> a cluster of eight nodes.
>>
>> We're doing an insert and after a delete like:
>>
>> delete from *column_family_name* where *id* = value
>>
>> Immediatly select to check whether the DELETE was successful. Sometimes
>> the value still there!!
>>
>>
>>
>> Any suggestions?
>>
>> --
>>
>> Atenciosamente,
>> Sávio S. Teles de Oliveira
>>
>> voice: +55 62 9136 6996
>> http://br.linkedin.com/in/savioteles
>>
>> Mestrando em Ciências da Computação - UFG
>> Arquiteto de Software
>>
>> CUIA Internet Brasil
>>
>
>
>
> --
>
> [image: datastax_logo.png] <http://www.datastax.com/>
>
> Ryan Svihla
>
> Solution Architect
>
> [image: twitter.png] <https://twitter.com/foundev> [image: linkedin.png]
> <http://www.linkedin.com/pub/ryan-svihla/12/621/727/>
>
> DataStax is the fastest, most scalable distributed database technology,
> delivering Apache Cassandra to the world’s most innovative enterprises.
> Datastax is built to be agile, always-on, and predictably scalable to any
> size. With more than 500 customers in 45 countries, DataStax is the
> database technology and transactional backbone of choice for the worlds
> most innovative companies such as Netflix, Adobe, Intuit, and eBay.
>
>


-- 
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