The difference between SaaS software and traditional software delivery mode

Everyone in the Internet circle knows ,“SaaS” The term is frequently used in the cloud market and Internet media platforms , We only know “SaaS” yes Software-as-a-Service（ Software as a service ） For short , Is a software layout model , Its application is designed for network delivery , It is convenient for users to host through the Internet 、 Deployment and access , But we don't know what the specific operation mode is , Let's study it together today ......

in the light of “SaaS” Service object of , In a broad sense SaaS Existing definitions To B There are To C Of , therefore , About SaaS, It can't be simply understood as SaaS = To B .

First , Let's take a look at the traditional software delivery process , If you are the head of an enterprise , The company needs to purchase a set of software type solutions , You need to go through the following processes ：1. Conduct in-depth consultation and provide demand description ;2. Service providers provide corresponding solutions , If approved , Pay related fees ;3. The technical team of the service provider starts to develop , At this time , Companies also need to buy their own servers 、 database , Set up the hardware environment so that the software can be installed ;4. Door to door installation and commissioning ;5. Put into use . The whole process comes down , The operation cycle is still relatively long .

Traditional software delivery model data is absolutely private （ The software is installed at the place designated by the customer company , Its possession 100% Control of ）, But the disadvantage is that the maintenance cost is too high , It requires continuous investment of personnel and resources to maintain the normal operation of the system , And software and hardware updates .

In the context of media software delivery mode , To meet customers' requirements for data security + The need for low maintenance costs ,SaaS There's a pattern , Let's use a table to compare the difference between the two ：

	SaaS Pattern	Traditional software delivery model
Deployment way	Cloud Architecture	Local deployment
Software payment method	lease , monthly / Annual payment fee	One time investment
Maintenance cost	nothing	Hardware + Software maintenance costs
Iterative way	Fast iteration speed	Slow iteration speed , Need to actively upgrade

To sum up ,SaaS The characteristic of the model is ： Cloud Architecture 、 Payment methods are flexible and diversified 、 Low maintenance cost and fast iteration speed . meanwhile , also SaaS Implementation of system multi tenant data isolation , The data isolation scheme is to provide an independent database for each tenant 、 Independent tablespaces 、 Distinguish tenants by field , Each scheme has its own application , For the convenience of understanding , We still use tables to compare the advantages and disadvantages of these three data isolation schemes ：

Isolation plan	cost	Number of tenants supported	advantage	Insufficient
Independent database system	high	Less	The highest level of isolation , Good safety , Able to meet the unique needs of different tenants , It's easier to recover data in case of failure	The database needs to be installed independently , High maintenance and acquisition costs
Shared database , Independent table space	in	More	Provides a degree of logical data isolation , A database system can support multiple tenants	In case of failure , Data recovery is relatively complex
By tenant id Field differentiation	low	A lot	Lowest maintenance and acquisition costs , Each database can support the largest number of tenants	Lowest isolation level , The security is also the lowest , Data backup and recovery is very complex , You need to backup and restore one by one

So many advantages , Actually SaaS There are also shortcomings , such as , Because the data is stored on the supplier's server , Data security has become a problem , Software as a service applications are hosted in the cloud , Far away from application users , There may be a delayed response , But these as long as the application of a secure database and Application CDN Traffic scheduling for , Can be more or less solved accordingly , Compared with the traditional software delivery mode with high cost, it still has advantages .