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Order replacement geocoding server
pummlezaken is getting old (#259) and still has mechanical HDDs. Replacing it is part of the 2022 budget that has been approved.
per @lonvia, 3.84TB is more than enough disk space to last 5 years.
Questions remaining
- [ ] Where to locate it? My inclination is AM6, since the last Nominatim server went into DB4
- [ ] Decide on RAM. Will 256GB of RAM be enough?
- [ ] Decide on CPU - did we get the CPU/IO balance right with longma? If so, I'd go for the EPYC 7453 again. If it is cpu-heavy, we could go for EPYC 7443 for 96 threads instead of 112.
- [ ] Get quote(s)
- [ ] Place order
The limiting factor for Nominatim is still IO. I haven't managed to have more than 30 CPUs in use in parallel on longma. Rather save on CPU and go for more RAM instead.
Tentative specs Supermicro 1124US-TNRP 2x AMD EPYC 7413 (24 [email protected]) 512GB RAM? 2x 3.84TB Samsung PM9A3 or equivalent PCI-e 4.0 NVMe 2x240GB boot drives No RAID controller
Basically longma with less CPU cores and frequency, more L3 cache, more boost clock, double the RAM, and latest-generation NVMe. Retail price 12.5k EUR.
Intel equivalent would be 2x Xeon Scalable 3 Gold 5318Y in SYS-120U-TNR for about the same retail. Slower clock rates, slower RAM, less L3 cache, different architecture. I've been pretty happy with how the AMD servers have performed, so I'm inclined to stick with them.
We've emailed for a quote on a used HP DL360 w/ 2x Xeon 6148, 384GB RAM, 2x3.84TB NVMe.
Space prepared in AM6 rack, see rack wiki. Three ethernet, two power, no rails.
Server is installed, chef role assigned, and handed over to lonvia as nominatim sysadmin.