here is the output: every node in a single DC is in the same rack.
Datacenter: WDC5
================
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
-- Address Load Tokens Owns (effective) Host ID
Rack
UN 10.125.138.33 299.22 GB 256 64.2%
8aaa6015-d444-4551-a3c5-3257536df476 RAC1
UN 10.125.138.125 329.38 GB 256 70.3%
70be44a2-de17-41f1-9d3a-6a0be600eedf RAC1
UN 10.125.138.129 305.11 GB 256 65.5%
0fbc7f44-7062-4996-9eba-2a05ae1a7032 RAC1
Datacenter: WDC
===============
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
-- Address Load Tokens Owns (effective) Host ID
Rack
UN 10.124.114.105 151.09 GB 256 38.0%
c432357d-bf81-4eef-98e1-664c178a3c23 RAC1
UN 10.124.114.110 150.15 GB 256 36.9%
6f92d32e-1c64-4145-83d7-265c331ea408 RAC1
UN 10.124.114.108 170.1 GB 256 41.3%
040ae7e5-3f1e-4874-8738-45edbf576e12 RAC1
UN 10.124.114.98 165.34 GB 256 37.6%
cdc69c7d-b9d6-4abd-9388-1cdcd35d946c RAC1
UN 10.124.114.113 145.22 GB 256 35.7%
1557af04-e658-4751-b984-8e0cdc41376e RAC1
UN 10.125.138.59 162.65 GB 256 38.6%
9ba1b7b6-5655-456e-b1a1-6f429750fc96 RAC1
UN 10.124.114.97 164.03 GB 256 36.9%
c918e497-498e-44c3-ab01-ab5cb4d48b09 RAC1
UN 10.124.114.118 139.62 GB 256 35.1%
2bb0c265-a5d4-4cd4-8f50-13b5a9a891c9 RAC1
On Thu, Apr 14, 2016 at 4:48 AM, Eric Stevens <[email protected]> wrote:
> The output of nodetool status would really help answer some questions. I
> take it the 8 hosts in your graph are in the same DC. Are the four serving
> writes in the same logical or physical rack (as Cassandra sees it), while
> the others are not?
>
> On Tue, Apr 12, 2016 at 10:48 PM Anishek Agarwal <[email protected]>
> wrote:
>
>> We have two DC one with the above 8 nodes and other with 3 nodes.
>>
>>
>>
>> On Tue, Apr 12, 2016 at 8:06 PM, Eric Stevens <[email protected]> wrote:
>>
>>> Maybe include nodetool status here? Are the four nodes serving reads in
>>> one DC (local to your driver's config) while the others are in another?
>>>
>>> On Tue, Apr 12, 2016, 1:01 AM Anishek Agarwal <[email protected]> wrote:
>>>
>>>> hello,
>>>>
>>>> we have 8 nodes in one cluster and attached is the traffic patterns
>>>> across the nodes.
>>>>
>>>> its very surprising that only 4 nodes show transmitting (purple)
>>>> packets.
>>>>
>>>> our driver configuration on clients has the following load balancing
>>>> configuration :
>>>>
>>>> new TokenAwarePolicy(
>>>> new
>>>> DCAwareRoundRobinPolicy(configuration.get(Constants.LOCAL_DATA_CENTRE_NAME,
>>>> "WDC")),
>>>> true)
>>>>
>>>>
>>>> any idea what is that we are missing which is leading to this skewed
>>>> data read patterns
>>>>
>>>> cassandra drivers as below:
>>>>
>>>> <dependency>
>>>> <groupId>com.datastax.cassandra</groupId>
>>>> <artifactId>cassandra-driver-core</artifactId>
>>>> <version>2.1.6</version>
>>>> </dependency>
>>>> <dependency>
>>>> <groupId>com.datastax.cassandra</groupId>
>>>> <artifactId>cassandra-driver-mapping</artifactId>
>>>> <version>2.1.6</version>
>>>> </dependency>
>>>>
>>>> cassandra version is 2.0.17
>>>>
>>>> Thanks in advance for the help.
>>>>
>>>> Anishek
>>>>
>>>>
>>
