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Posted to user@cassandra.apache.org by Tom Wollert <to...@codeweavers.net> on 2019/02/27 09:36:11 UTC
Connection status on cluster exposed anywhere?
Is it possible to get the current connection status out of Cassandra C#
driver?
In particular I'm looking at getting
- connected hosts
- whether the node is considered up by the driver
Which I can get from the MetaData, as well as:
- connected keyspaces
- the number of connections open(per keyspace, as the connectionpool is not
shared)
- the number of current read/writes (per keyspace/host ideally)
Which seems to be internal state that is never exposed.
Any ideas before I use reflection to look at the internal state?
Cheers,
Tom
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Re: Connection status on cluster exposed anywhere?
Posted by Tom Wollert <to...@codeweavers.net>.
Thanks for the link Unfortunately doesn't quite help me with what I need
(or think I need). We only see the IP address who has connections open, but
we have multiple applications running on the same server so can't tell
which one (pg and sql server I think allow passing in an identifier as part
of the connection string for example).
It also seems like the driver might have different ideas about whether a
node is up or not that is different from what the respective nodes think.
Which is why I'd like the clients perspective on those metrics.
On Wed, 27 Feb 2019 at 18:41, Rahul Singh <ra...@gmail.com>
wrote:
> You can get statistics at a table level, and you can get some information
> at a keyspace level, but it's an approximation. Better to get tablelevel
> and aggregate up. Here are some pointers.
>
>
> https://blog.anant.us/resources-for-monitoring-datastax-cassandra-spark-solr-performance/
>
>
>
> On Wed, Feb 27, 2019 at 4:36 AM Tom Wollert <to...@codeweavers.net>
> wrote:
>
>> Is it possible to get the current connection status out of Cassandra C#
>> driver?
>>
>> In particular I'm looking at getting
>> - connected hosts
>> - whether the node is considered up by the driver
>> Which I can get from the MetaData, as well as:
>> - connected keyspaces
>> - the number of connections open(per keyspace, as the connectionpool is
>> not shared)
>> - the number of current read/writes (per keyspace/host ideally)
>> Which seems to be internal state that is never exposed.
>>
>> Any ideas before I use reflection to look at the internal state?
>>
>> Cheers,
>>
>> Tom
>>
>
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Re: Connection status on cluster exposed anywhere?
Posted by Rahul Singh <ra...@gmail.com>.
You can get statistics at a table level, and you can get some information
at a keyspace level, but it's an approximation. Better to get tablelevel
and aggregate up. Here are some pointers.
https://blog.anant.us/resources-for-monitoring-datastax-cassandra-spark-solr-performance/
On Wed, Feb 27, 2019 at 4:36 AM Tom Wollert <to...@codeweavers.net>
wrote:
> Is it possible to get the current connection status out of Cassandra C#
> driver?
>
> In particular I'm looking at getting
> - connected hosts
> - whether the node is considered up by the driver
> Which I can get from the MetaData, as well as:
> - connected keyspaces
> - the number of connections open(per keyspace, as the connectionpool is
> not shared)
> - the number of current read/writes (per keyspace/host ideally)
> Which seems to be internal state that is never exposed.
>
> Any ideas before I use reflection to look at the internal state?
>
> Cheers,
>
> Tom
>
> <https://codeweavers.net>
> *Codeweavers Showroom System Q1 Goals
> <https://codeweavers.net/company-blog/codeweavers-showroom-system-q1-goals>*
>
> <https://codeweavers.net/company-blog/codeweavers-showroom-system-q1-goals>
> *Who could dealers collaborate with for shared success?
> <https://codeweavers.net/company-blog/who-could-dealers-collaborate-with-for-shared-success>*
>
> *Phone:* 0800 021 0888 * Email: *contactus@codeweavers.net
> *Codeweavers Ltd* | Barn 4 | Dunston Business Village | Dunston | ST18 9AB
> Registered in England and Wales No. 04092394 | VAT registration no. 974
> 9705 63
>
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