Database server migration

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Due to the same reasons that maris is needing to be decommissioned I am going to be migrating the installation of sabre to completely new hardware. The hardware is still boxed and I will install it into the rack and make preparations to do a straight mirror copy of the OS and data from sabre on to it. All service names will remain the same. However, this will mean that the PostgreSQL and MySQL services will be unavailable for a short window during the migration. I will make a precopy and then do a final copy of the changed files (with rsync) to reduce this window. Because there is still a significant amount of data which will change so we could possibly be looking at a window of 20 mins.

I am thinking of doing this on the morning of the 20th of Jan.