The school has been using the wireless wifi system for years.——Whether the original system provider stopped maintaining, failed to keep up with demand, or the school decided to change a more suitable platform."The old system is out. The new system's on.", which involves the migration of user balances, archiving historical data, rebuilding authentication strategies, and slicing window options. This collages key links and risk points for a replacement migration to keep the process as smooth as possible.
User balance migration is the most sensitive step
The migration of user balances is the most sensitive and easy part of the migration of the wireless Wifi system on campus.——The data must be moved to the new system in a complete and accurate manner. Loss or error of balance data means that the student’s money is in trouble, complaints and trust crises will erupt immediately.——Even if it's a few dollars.——The reasons for the discrepancy must be checked and corrected before it can enter the cut with a difference.
Another difficulty in moving the balance is that the suites are valid."Valid until 31 December 2026"This time-style is valid, and there may be."Remaining flow of 500G"The flow-type is valid. The new system may have different data sets.——Like the new system."Package ID+ Remaining Days + Residual Flow"Grouping indicates old system use"Package type + maturity date + used traffic". If the data format conversion process fails, the package information that students see in the new system will be wrong——"Three months left to the package. The new system says one month.". The map is field-by-field confirmation before moving against the differences in data structure of both systems.
Archiving policy for historical data
Whether the historical data of the old campus wireless wifi system (weblogs, billing records, charging records) need to be imported into the new system in its entirety? This depends on two factors: amount of data and compliance requirements. If the old system has been running for five years, millions of logs and billings have accumulated, the full import of the new system will be a challenge both in terms of database capacity and time of import. The recommended approach is to migrate only the last 90 days of web logs and billing to new systems, to export earlier historical data and archive them offline (e.g. back-up to NAS), and to keep only the necessary immediate data in the database. This would satisfy compliance requirements without allowing the new system ' s databases to become too swollen by full import.
Formats of archived data need to consider subsequent readability. Exported log data are recommended to be saved in CSV or JSON format, avoiding reliance on old system database formats——An old database may not be directly accessible after the retirement of the old system. A completeness check is performed when exported: whether the distribution of documents, log lines, key fields (user ID, time stamp, traffic values) corresponds to the aggregated data of the old system.
Rebuilding authentication strategy instead of simply copying it
The authentication strategy for the WiFi system of old and new campuses cannot be simply replicated. The strategy for the old system is designed within the functional framework of the old system, which may differ from one another.——Like old systems only."A uniform school-wide strategy"New system support"Divisional differentiation strategy"; old system time-frames are manually configured, and the new system supports automatic switching. The migration is an opportunity to re-examine strategy design, not to move it over. It is suggested that the current list of strategies for the old system be sorted out and the design intent (why this was done).——Keeps the intent of the old strategy, but with the ability of the new system. For example, the time limit for old system accommodation units is manually modified by the operators and the new system supports automatic shift times, so that the manual strategy is replaced by an automated one that reduces the load on the carrier.
The process of strategic reconstruction needs to be confirmed with the relevant authorities.——Information centres, logistics, teaching staff, and school workers. Some of the old strategies may have been set in certain historical conditions (e.g. a budget constraints have led to low speeds in dormitories), but now they are changed (export bandwidth) and adjusted. If we simply move on with the old strategy, it is wasting the capacity of the new system.
Cut Window Selection
The cutting window is the time period during which the old system is disabled and the new system is online."Minimize impact". The ideal cut window is the minimum time period for network usage——For example, during the winter break or 2-6 a.m. The cold break is a problem: when the new system is online, it has very few users, and the system operates with low loads, so it does not come up until high loads in the school year start. So the first week before the cold break starts is tested for a pressure test to confirm that the new system is stable at high loads.
The benefit of morning slitting is that the user will not be affected during daytime, but the window cut in the early morning (2-4 hours). If there are problems during the cutting, it may take longer than the window and the network has not been restored at 8:00 a.m."Time is running out."——Any step is stuck, leaving little time for screening and restoration. The proposed cut window is set aside for at least eight hours (e.g. 0:00-8:00 a.m.), the cut-off plus validation+ problem is completed within eight hours, and the network must be restored by 8 p.m. (whether new or back to old systems).
Parallel Run Validation Period
The old and new campus wireless WiFi system should be running parallelly for a while before cutting.——Two systems receive the same user flow simultaneously, comparing authentication success rates, bill accuracy, and response speed. Parallel running does not allow both systems to be connected (and users will see two certification pages), but shadow testing on the back of a platform: simulation of real user behaviour with test accounts, running simultaneously on old systems and comparing results. Shadow testing runs for at least one week, covering daily and peak periods. If a shadow test reveals that new systems have less successful certification than old systems, that there are deviations in costing data, or that responses are significantly slower than old systems, these issues must be resolved before they are cut and cannot go into cutting with known problems.
Preparation and rehearsal for the retreat programme
The withdrawal program must be prepared on the day of the cut: if a large area failure, an abnormal billing or other problems seriously affecting user access occurs when the new campus WiFi system is online, it will return to the old system's independent operation within five minutes."Problem with the new system when it's online", click the retreat step to confirm when the old system is back in stand-alone status. The exercise also confirms the consistency of the user balance data.——The last balance snapshots of the old system must be saved before cutting, and then back to the old system with snapshot data. If the old system also produces new billing data during the cut-off (some users in the cut window may still be using the old system to authenticate access to the Internet), these new data will need to be merged into the old system database after retreating.
Checklist after slicing
The new campus WiFi system is to be cleared and verified on a case-by-case basis for the following: normal certification of regions (housespaces, teaching areas, office space); availability of authentication methods (schoolworker numbers, cell phone numbers, micromails); accuracy of calculation fees for individual packages; configuration of bandwidth strategies; regular charge-back channels; operationalization of the default network strategy; proper operation of backstage management interfaces; consistency of reporting data with expectations."Someone actually confirmed it.", not just the system logs."Normal". For example, a collection channel requires someone to actually pay a sum of money with micromails and confirm the balance is updated.
Departure of the moving dimension
The successful cut does not mean the end of the migration. When the old and new campus wireless wifi system is switched, the crew takes a certain amount of time to adapt: familiarize with the interfaces of the new system, master the new system's fault-checking methods, and create a new operation process.——Sufficient to cover a full monthly billing cycle (from start-up to end-of-month bill generation)."Shadow support"——The old system has problems, and the old system can be checked by its people (they know about the school network’s special configuration and history).
The migration is a system project, not a system."Change the equipment."So simple. It involves data migration, strategy reconstruction, slicing windows, retreat options, checklists, transport links.——Each link is compromised by the network service. The details of each link are planned ahead and rehearsed, so that the migration process does not get messy.