4 ms·
This is replication between zones, not within a single zone.
by foota 2y ago
This is replication between zones, not within a single zone.
- londons_explore 2y agoThe form would look like this: CREATE PERSISTENT DISK ---------------------- Replicas: W Zones to split replication across: X How many replicas must complete a write to allow the VM to continue: Y How many zones must complete a write to allow the VM to continue: Z With the above settings, you can expect approximately: Write latency 5-95%: 0.5-2.5 milliseconds Mean time to committed data loss: 37 years Mean time to failure to write: 3 years Mean time to data loss of data over 1 minute old: 18327 years. Cost: $0.18/GB/month The user would set those 4 parameters, with help text for guidance and a big red warning if you set the parameters to something insanely slow/unreliable.
- gtirloni 2y agoAnd the customer support teams would waste countless hours debugging scenarios that the customer had no idea what they were doing. All of that with a SLO breathing down their neck.
- londons_explore 2y agoEasy enough to say "You had the replication parameters set to 1 replica, so data loss was expected every 1 month on average, and now some of your data has been lost. You can try to recover data with these opensource tools, or you can delete the disk and start again. We recommend replication of at least 1.15 to get a mean time between data loss of 150 years."