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From "ilya.kasnacheev" <ilya.kasnach...@gmail.com>
Subject Re: Ignite Client is taking a long time to connect with large number of Client connections
Date Wed, 21 Mar 2018 18:02:53 GMT
Hello!

Ignite Clients are called "Thick", and indeed, they are pretty heavy-weight.
They are full functional nodes, and as such, they have to join topology when
starting and properly leave topology when stopping. This is long process. It
also has to wait for any pending transactions in cluster, that's where you
are seeing unpredictable times.

Ignite Clients are fully thread safe. You should never need to have more
than one client per long-running process. You should avoid having Ignite
Clients in short-lived processes. Reuse Ignite Clients where possible.

You can use JDBC Thin client, ODBC client or REST API (for simple use cases)
to avoid said limitations. There's currently work underway to introduce more
thin clients for various platforms.
https://apacheignite-sql.readme.io/docs/jdbc-driver
https://apacheignite.readme.io/docs/rest-api and other platforms &
protocols.

There's no hard limit on number of clients, but practically I would not
recommend having more than a few dozens, and definitely not having clients
come and go all the time.

Regards,



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