Chris from Postmark here. We definitely had some trouble over the last few weeks. I am hoping we are beyond that in terms of architecture. So far everything looks great.
Regarding lock-in, this was pretty important to us when we decided to migrate. We prefer to control everything in our data center, so if it came down to it, we wanted that option. Since the Cloudant API is compatible with CouchDB, the migration path is not that hard. Although, considering our impression so far and their expertise, I don't expect it will come to that point.
Thanks for the info Chris. I certainly hope you won't have to make another big move, but vendor lock-in is always a consideration. Also, I'm curious about network/other latency and bandwidth limits when it comes to accessing cloud-based database services. Did you do any measurements on that before or after switching?
...and regards to Natalie, Dana and the rest of the postmark team!
EDIT: noticed info about latency from cloudant on another comment.
Regarding lock-in, this was pretty important to us when we decided to migrate. We prefer to control everything in our data center, so if it came down to it, we wanted that option. Since the Cloudant API is compatible with CouchDB, the migration path is not that hard. Although, considering our impression so far and their expertise, I don't expect it will come to that point.