Re: Does long latency affect Cassandra's performance

[Nitan Kainth]

Yes, it will have negative impact.
Avoid doing it if you can

Sent from my iPhone

> On Dec 15, 2018, at 12:18 PM, dayu  wrote:
> 
> Nitan,
> thanks for your reply.
>The new node in different DC is added as same DC, so i mean I use quorum 
> or all for three replicate not local quorum.
> does the long latency will block coordinate and affect the performance？
> 
> dayu
> 
>   
> dayu
> 邮箱：sdycre...@163.com
> Signature is customized by Netease Mail Master
> 
> On 12/16/2018 02:00, Nitan Kainth wrote:
> Dayu,
> 
> If you use local quorum it won't impact read and write latencies but there 
> will be delay in across DC replication; which may cause some application 
> issues if it is active active. But 2ms is probably negligible to see any 
> effect.
> 
>> On Sat, Dec 15, 2018 at 11:57 AM dayu  wrote:
>> Hi all，
>> I am adding a new node to cassandra，but the new node is at different 
>> DC，the ping latency between them is 2 ms.
>>I am wondering does the long latency would affect cluster's performance 
>> or thoughput？
>> 
>> Thank!
>> dayu
>> 
>>  
>> dayu
>> 邮箱：sdycre...@163.com
>> Signature is customized by Netease Mail Master

Re: Does long latency affect Cassandra's performance

[dayu]

Nitan,
thanks for your reply.
   The new node in different DC is added as same DC, so i mean I use quorum or 
all for three replicate not local quorum.
does the long latency will block coordinate and affect the performance？


dayu


| |
dayu
邮箱：sdycre...@163.com
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On 12/16/2018 02:00, Nitan Kainth wrote:
Dayu,


If you use local quorum it won't impact read and write latencies but there will 
be delay in across DC replication; which may cause some application issues if 
it is active active. But 2ms is probably negligible to see any effect.


On Sat, Dec 15, 2018 at 11:57 AM dayu  wrote:

Hi all，
I am adding a new node to cassandra，but the new node is at different DC，the 
ping latency between them is 2 ms.
   I am wondering does the long latency would affect cluster's performance or 
thoughput？

Thank!
dayu


| |
dayu
邮箱：sdycre...@163.com
|

Signature is customized by Netease Mail Master

Re: Does long latency affect Cassandra's performance

[Nitan Kainth]

Dayu,

If you use local quorum it won't impact read and write latencies but there
will be delay in across DC replication; which may cause some application
issues if it is active active. But 2ms is probably negligible to see any
effect.

On Sat, Dec 15, 2018 at 11:57 AM dayu  wrote:

> Hi all，
> I am adding a new node to cassandra，but the new node is at different
> DC，the ping latency between them is 2 ms.
>I am wondering does the long latency would affect cluster's performance
> or thoughput？
>
> Thank!
> dayu
>
> dayu
> 邮箱：sdycre...@163.com
>
> 
>
> Signature is customized by Netease Mail Master
> 
>

Does long latency affect Cassandra's performance

[dayu]

Hi all，
I am adding a new node to cassandra，but the new node is at different DC，the 
ping latency between them is 2 ms.
   I am wondering does the long latency would affect cluster's performance or 
thoughput？

Thank!
dayu


| |
dayu
邮箱：sdycre...@163.com
|

Signature is customized by Netease Mail Master