Nikolay,
See the discussion on the user list:
1. It is not immediately obvious which APIs perform server calls and which
don't.
2. It is not clear which APIs can cause heavy resource usage on the server
side.
We don't want to stress servers by pinging them.
cache.size() is an example - it is tempting to use and seems to be
simple, but actually queries every server node in the cluster.
> dedicated `ping` operation makes our API heavier
The operation is so trivial that I would not worry about increased
complexity or future maintenance.
On Mon, Sep 14, 2020 at 10:17 AM Nikolay Izhikov <nizhi...@apache.org>
wrote:
> Hello, Igor.
>
> On the other hand, dedicated `ping` operation makes our API heavier
> without adding new feature -
> We can do the same with the other part of the API.
>
> Moreover, response to the ping doesn’t mean that SQL or cache query can be
> served.
>
> > 14 сент. 2020 г., в 10:08, Igor Sapego <isap...@apache.org> написал(а):
> >
> > Николай,
> >
> > It looks a little bit hacky to me. I believe SQL drivers usually use that
> > approach
> > as a workaround because there is no other common way to do that.
> >
> > Sure we can recommend users to use cache.size() or anything other
> > similar way
> > to ensure the connection is alive, but it still looks like a workaround
> to
> > me.
> >
> > Best Regards,
> > Igor
> >
> >
> > On Sun, Sep 13, 2020 at 10:16 PM Николай Ижиков <nizhi...@apache.org>
> wrote:
> >
> >> Hello, Pavel.
> >>
> >> SQL drivers usually use “SELECT 1” query to ensure connection is alive.
> >>
> >> Can we use similar approach?
> >>
> >> Отправлено с iPhone
> >>
> >>> 13 сент. 2020 г., в 13:26, Pavel Tupitsyn <ptupit...@apache.org>
> >> написал(а):
> >>>
> >>> Igniters,
> >>>
> >>> There is a feature request for a thin client Ping operation on the user
> >>> list [1].
> >>> I think that is a good idea - IgniteClient.ping() will be a valuable
> >>> addition.
> >>>
> >>> Any objections?
> >>>
> >>> [1]
> >>>
> >>
> http://apache-ignite-users.70518.x6.nabble.com/Feature-request-method-to-test-active-connection-in-Ignite-thin-client-td33985.html
> >>
>
>
