Sharding to be or not to be?

[supercaligit]

The documentation recommends that sharding not be used for database size less that 100Gb, because clearly the overhead outweighs the benefits. So if I start with a nonsharded database and then expect to migrate to a sharded database I have the following questions.

• In a non sharded database , should one adopt the suffix method to anchor related documents to same bucket so that when you move to sharded database those documents would stay together??
• If you migrate from a nonsharded to a sharded database, are related documents automatically maintained on same shard?

[ayende]

• If you use the suffix method, when you move to sharded, we'll keep them in the same bucket, yes.
• Are you expecting to grow to > 100GB in the next year? Or is this planning for the future?