4 ms·
As long as you treat servers as cattle, you can use Hetzner's own load balancer service and then you don't have a SPOF that you manage yourself. Their LBs are a
by heipei 5y ago
As long as you treat servers as cattle, you can use Hetzner's own load balancer service and then you don't have a SPOF that you manage yourself. Their LBs are advertised as redundant / fault tolerant.
- SergeAx 5y agoI don't know if it is possible to treat "Serverbörse" servers as cattle. They are all different. I know that k8s and Docker Swarm could in theory balance load between different machines, but never tried it in practice. But I had in practice some weird glitches with different CPU/motherboards/memory. Also, comment I was replying to mentioned a 48 euro budget, it is a price of a single server.
- hansel_der 5y agoi think the whole point of vm/container is to enable "servers as cattle"
- SergeAx 5y agoYes, but "Serverbörse" machines are very non-uniform, which may be bad for load balancing. See yourself: https://www.hetzner.com/sb https://www.hetzner.com/sb
- hansel_der 5y agoyes, it may be bad for indiscriminate/dumb load balancing. then again this only works in the firstplace if the work units represent a somewhat equivalent and small-ish workload. once you place value on determinism (in regards to time spent on a task) you want a tightly specced distribution mechanism and/or a feedback loop to communicate busystate back to the LB.
- halilduygulu 5y agoStill you can get a nice server with i7 cpu 32gb memory with 20tb traffic for ~28 euro, vat incl. This is super competitive even with DO or others.
- withinboredom 5y agoI have 3 servers, 2/3 don't have hardware timestamping on the interface, 1 does. Makes a huge difference when it comes to NTP.
- csdvrx 5y agoWhich hetzner server have hardware timestamping on the interface? I'd be really interested to know, since to the best of my knowledge, they don't have PTP solutions in their datacenter.
- withinboredom 5y agoI have two of the AX41-NVMe, and only one was lucky enough to get a "Intel Corporation I210 Gigabit Network Connection (rev 03)" which has the hardware timestamping. In the finland datacenter, it appears there is a PTP running, though the offset is ~2.33 seconds off from NTP. Chrony says its a false-ticker, but I haven't really figured out how to get it configured correctly nor have I asked Hetzner for help. I've mostly just played around with it. I did manage to also accidentally discover a local ISP's stratum 1's server is extremely close to me, as in a few microseconds away (I accidentally put hetzner's servers as a pool instead of a server and my NTP 'discovered' the stratum 1) ... I'm not using it, but I've thought about reaching out to them to ask if I can use it if I'm very nice.
- csdvrx 5y agoWould you care to share the IPs? (both for the Hetzner PTP one and the local ISP stratum 1) Is the 2.33s stable? If so, after deducing the stable offset, it could still be valuable.
- withinboredom 5y ago`/dev/ptp0` and `/dev/pps0` magically showed up and yeah, it appears to be stable. Chrony actually has it marked as a non-false ticker atm and is marked as a backup. Here's the stats: Name/IP Address NP NR Span Frequency Freq Skew Offset Std Dev ============================================================================== PPS 64 40 67m -6.827 33.059 -72ms 99ms PTP 6 3 20 -9.585 0.005 -119ms 10ns 192.168.100.1 6 3 88h -0.159 0.000 -12ms 3815ns 192.168.100.2 6 3 29h -0.176 0.299 -11ms 2817us ntp1.hetzner.de 14 10 154m -0.003 0.006 -47us 12us ntp2.hetzner.de 11 6 103m -0.001 0.005 -21us 5711ns ntp3.hetzner.de 9 6 137m -0.006 0.007 -72us 8949ns I don't feel great about sharing the discovered stratum 1's on the open internet, but my email address is in my profile.