Draft operational guidelines of digital india land records modernization programme (dilrmp) introduction

7. STATE-LEVEL DATA CENTRES
In order to maintain data repository and backup, each State/UT may need to establish a dedicated data centre for the land records data (including maps and registration data) at the State/UT level. This data centre would have estimated storage capacity scalable from 2 to 20 terabytes, depending upon the volume of records, along with high speed processors, switches, fiber optic channels, software and security devices. Further, these would have appropriate backup media (like CDs and tape devices, etc.) for high volume storage. Storage area network (SAN) may also be set up where feasible and necessary. Action for setting up of the SLDCs may be taken up when sufficient data has been created in the districts for storage at the State/UT level.
8. INTER-CONNECTIVITY AMONG REVENUE AND REGISTRATION OFFICES
All the land record offices, from the State/UT level to the tehsil or equivalent level, as well as the registration offices may be securely connected via local area network (LAN) or wide area network (WAN) in an appropriate configuration based on the functional and technical requirements. In order to achieve functional integration among the tehsils, districts, SROs and State data centres, each location would be provided with network connectivity with 2 mbps link for last mile connectivity from the point of presence (PoP) of the State Wide Area Network (SWAN). From there upwards, the data would ride over the NICNET network. In addition, each site would require one set of switch/ router and modem. Time required for this would vary, depending upon the progress made on the SWAN project of the Department of Information Technology. However, alternative approaches can be taken for connectivity in the interim period, such as broadband/leased line with virtual private network (VPN) infrastructure for secure data transmission. This network may have a centralized architecture connecting the tehsils, sub-registrar offices, sub-divisions, districts and the State/UT Data Centres for enabling online data updation, easy access and sharing of data. The network may be designed by or with input from the NIC and by enforcing the approved security protocols and access control protocols of the DIT, GoI. Where the SWAN is available, horizontal connectivity to tehsils or SR offices may be drawn from the nearest available PoP using leased lines or other secure connectivity. At places where the SWAN is yet to be implemented, other options such as broadband with VPN or VSAT connectivity could be established. From the district upwards, the system could ride over the NICNET network.