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All services are stateless and use database or our own object store for storage.

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When you are big you would have enough fat to divide into services and have each service use its own technology and maintain it.

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We store data in 3 primary data centers due to safe harbor rules and location proximity.

We use a service oriented architecture based on REST and it allow us to scale each service independently.

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Geography: It has a presence in at least two geographic regions, with some personnel.

We observe more than 2K api request per second on average as per New Relic.

What do you do that is unique and different that people could best learn from?

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Put an extra effort to fix problems that keep you up at night and go from defensive to offensive mode as soon as possible.

For real time sync we had to change our sync algorithm to work more like Svn where the client receives incremental events and try to do an eventual consistent sync with cloud state.

At some point we were throwing more hardware temporarily to get some breathing room in order to peel the layers of scaling onion one by one.

Egnyte is an Enterprise File Synchronization and Sharing startup founded in 2007, when Google drive wasn't born and AWS S3 was cost prohibitive.

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We use fairshare allocation on core service node resources to incoming requests.

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File sharing: This is support for multiple levels of mobile file sharing among devices belonging.

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Some python code still resides on server but most of it is migrated to Java as we had more server developers with java familiarity and scaling experience.

We offer a free 15 day trial and after that they convert or we disable them.

You can find more about these in the For The Techies section at our blog.

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Even sharded Berkeley DB was choking under the stress and there was a database crash with recovery taking hours, it had to be replaced.

This is a guest post by Kalpesh Patel, an Architect, who works from home.

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Being focused on paid customers allowed us to deliver an enterprise class solution without paying the freemium penalty.

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The intent is to catch them when they are yellow and before customer notices.

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EOS as it allowed us to go from defensive to offensive positioning.

There are many unique things but the storage layer, event based sync is definitely worth learning, here are more details on it Egnyte object store and Egnyte Canonical File System.

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Keep it simple: New engineers join every month so goal is to have them productive from week one, a simple architecture ensures easy induction.

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Focus on the core capability of your startup and for it if you have to build something custom then go for it.

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SOA from day one, it took us some time to reach there but we are there now.

Content manipulation: Features such as document view, editing and annotation in the mobile.

Instead of penalizing everyone, see if you can do fair share allocation of resources and penalize only the abusive users.

Mobile OS diversity: This is support through a local native application for iOS and Android.

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We use exponential backoffs when calling between core services and services have circuit breakers to avoid thundering herd.

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Each incoming request on core service node is tagged and classified into various groups.

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In SOA build circuit breakers to start sending 503s if your service is choked.

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Each group has a dedicated capacity and if one customer is making 1000 request per second and other is making 10 request then this system would ensure that the second customer would not face noisy neighbor issue.

References: Five customers must have deployed the service or product for a minimum of six.

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This also allows us to move some of the backend services to be hosted in public cloud.

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Similarly if one customer is causing an anomaly that is choking the system then temporarily disable that customer or service for that customer and reenable it when issue is fixed.

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For storage we wrote our own and now we use a pluggable storage architecture to store to any public cloud like S3, GCS, Azure.

We broke the limits of NFS and it was choking left and right and it had to be replaced with http.

The timing with good execution, financial discipline by management team lead to the success.

Some of the core services with SLA are isolated in PODs and this ensure that one bad customer won't choke the entire data center.

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We use event based sync in our desktop sync client code, as server events are happening they get pushed to client from server and client replays them locally.

What is the name of your system and where can we find out more about it?

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Use more of public cloud for any new services and migrate more services to public cloud.

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Always be available: Have a service level circuit breaker and a circuit breaker by customer.

SEO but overtime as we grew, we used many channels to acquire customers like Social media, Biz dev, Trade shows, SEM, SEO, Inbound marketing and high touch sales for Enterprise customers.

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