Customers are increasingly aware of the need to back up their sites with a well managed server. Typically, the managed option often only extends to managing the operating system (and possibly hardware) of the server in question, i.e. updating the operating system with the latest security patches (something that an “intelligent” control panel, such as cPanel, can handle itself, mostly), latest package upgrades, and generally making sure the server works as intended.
In most cases, managed does not, however, cover application issues. This, however, is a crucial point: You as the customer need to be sure that the server administration side of your enterprise speaks the same language as the application development side. Nothing is worse than an eager sysadmin updating a software package without consulting the developers who, incidentally, depend on the older version for the entire site to run smoothly. With nowadays globalisation, this can cause you additional grief – often your developers are from a different company than your ISP, and often they (as is natural) will defend themselves in taking the blame. It will leave you and your enterprise crippled or hindered.
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