> For the complete documentation index, see [llms.txt](https://docs.mosip.io/1.1.5/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mosip.io/1.1.5/build-and-deploy/cell-based-deployment-architecture.md).

# Cell Based Deployment Architecture

### Context

Scalability of complex systems is non-trivial especially when there are multiple running components like microservices, databases, storage clusters etc. with complex interactions. End-to-end performance modelling of such a system poses significant challenges as the performance of the 'whole' does not have a straight-forward linear relationship to its 'parts'.

MOSIP recommends a cell architecture where hardware and software within a cell is fixed (canned), and the cell is benchmarked for input/output capacity. Such cells, then, may be replicated to scale up capacity in a production depolyment with traffic diverted to them via a load balancer. Ideally, each cell must be islolated from each other without any cross-dependencies. Practically, however, they may share certain resources. Scalabilty of such common resources needs to addressed separately.

This document presents cell architecture for all major MOSIP modules for production deployment.

### Registration Processor Cell

![](/files/-MB55e-TTEHuHsW3mG3t)

The following resources are shared across cells:

* [ABIS](/1.1.5/biometrics/automated-biometric-identification-system-abis.md)
* ABIS Queue
* Registration Process DB
* ID Repository HDFS/CEPH cluster
* ID Repository DB

The communication between Demilitrized Zone (DMZ) and Militarized Zone (MZ) is strictly via a firewall.

The encrypted packets from registration client first land into Packet Landing Zone in the DMZ. Some of the Registration Processor stages run in the DMZ for initial packet handling.


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