FAQ entry about sharding by schema (#361)

citusdata · May 9, 2017 · 8d74343 · 8d74343
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@@ -96,3 +96,8 @@ Can I run Citus on Heroku or Amazon RDS?
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 At this time Heroku and Amazon do not support running Citus directly on top of Heroku PostgreSQL or Amazon RDS. It is up to them if/when they enable the Citus extension. If you are looking for something similar, `Citus Cloud <https://www.citusdata.com/product/cloud>`_ is our database-as-a-service which we fully manage for you. It runs on top of AWS (like both RDS and Heroku PostgreSQL) and should provide a very similar product experience, with the addition of Citus' horizontal scaling.
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+Can I shard by schema on Citus for multi-tenant applications?
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+It turns out that while storing each tenant's information in a separate schema can be an attractive way to start when dealing with tenants, it leads to problems down the road. In Citus we partition by the tenant_id, and a shard can contain data from several tenants. To learn more about the reason for this design, see our article `Lessons learned from PostgreSQL schema sharding <https://www.citusdata.com/blog/2016/12/18/schema-sharding-lessons/>`_.