We have a set of 6 servers in production for storing some massive databases. Right now they have 280Gb of disk space striped and mirrored across 15K SCSI Drives, our existing database fills them to 213Gb. The new data structure is approximately 1.1x larger than the old.
We need to double the disk space for on of these systems fairly inexpensively. I don't have a "budget" at this time, but let's assume it's under $5K.
We are migrating how we store these databases and we are not buying new servers to migrate too...
The goal is to migrate the data to a temporary database on some temporary storage, delete the old records after confirming that the move was successful, and then move the new records onto the permanent storage.
So, to summarize: 1) We need to temporarily "boost" the amount of capacity in order to migrate the data 2) We don't want to spend lots of money 3) We need to minimize the risk in the middle of transferring data.