Set default effective_io_concurrency and random_page_cost to SSD values Since all the drives with DBs on them are SSDs, set these GUCs to values more appropriate to a generic SSD. NVMe drives could have even higher concurrency, but this is a reasonable start.
Merge interface families Merge separate IPv4 and IPv6 interface definitions into a single definition with two sets of addresses.
Enable LACP on hosts in Amsterdam
Rename equinix role to equinix-ams
Make snap-01 the database master
Add additional interfaces to bond on karm
Add tests for db cookbook
Default to using the upstream repository for postgres
Use a udev rule to enable request merging for NVME devices
Make karm the database master
Update upstream role for Amsterdam machines
Update IP addresses for move from Imperial to Amsterdam
Make katla the database master
Revert "Move db-backup role to eddie" This reverts commit bb930580464a4446fd5f8513537e6295e6c15bcd.
Move db-backup role to eddie
Reduce random_page_cost for postgres instances on SSD
Tune new disks in karm and eddie
Update database servers to postgres 9.5
Make karm the database master
Set nomerge for nvme6n1 on karm