The issue is more with the number of tables, not the number of keyspaces. Because each table has a memTable, there is a practical limit to the number of memtables that a node can hold in its memory. (And scaling out doesn’t help, because every node still has a memTable for every table.) The practical table limit I have heard is in the low hundreds – maybe 200 as a rough estimate.
In general, we create a new cluster (instead of a new keyspace) for each application. Sean Durity From: Abdul Patel <abd786...@gmail.com> Sent: Thursday, May 03, 2018 5:56 PM To: User@cassandra.apache.org Subject: [EXTERNAL] Cassandra limitations Hi , In my environment, we are coming up with 3 to 4 new projects , hence new keyspaces will be coming into picture. Do we have any limitations or performance issues when we hit to a number of keyspaces or number of nodes vs keyspaces? Also connections limitations if any? I know as data grows we can add more nodes and memory but nor sure about somethinh else which need to take into consideration. ________________________________ The information in this Internet Email is confidential and may be legally privileged. It is intended solely for the addressee. Access to this Email by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. When addressed to our clients any opinions or advice contained in this Email are subject to the terms and conditions expressed in any applicable governing The Home Depot terms of business or client engagement letter. The Home Depot disclaims all responsibility and liability for the accuracy and content of this attachment and for any damages or losses arising from any inaccuracies, errors, viruses, e.g., worms, trojan horses, etc., or other items of a destructive nature, which may be contained in this attachment and shall not be liable for direct, indirect, consequential or special damages in connection with this e-mail message or its attachment.
