Our oldest swift backends in codfw and eqiad are approaching 4yrs of life and we've budgeted both a refresh for (12x per site) backends plus expansion (3x per site IIRC) for this fiscal year.
I'm outlining the steps below, similarly to T130012
- hw quotes and procurement. we've settled on systems with 3TB disks for now. Quotes will be something similar to T131953 and T132734.
- rack/row allocation for installation.
- eqiad: determine if we could install all the new hw in parallel or we need to do it piecemeal per-row / per-rack (physical space and 10G ports)
- codfw: ditto, though I suspect there is physical space / ports available