Güralp Systems - dig release notes


experimental version 1.2-8713


Changes from dig v1.2-8707 to dig v1.2-8713:


version 1.2-8706


Changes from dig v1.2-8700 to dig v1.2-8707:


version 1.2-8700


Changes from dig v1.2-8617 to dig v1.2-8700:


version 1.2-8617


Changes from dig v1.2-8615 to experimental dig v1.2-8617:


version 1.2-8615


Important changes from dig v1.2-8513 to dig v1.2-8615:


version 1.2-8613


Important changes from dig v1.2-8572 to dig v1.2-8613:


version 1.2-8572


Important changes from dig v1.2-8566 to dig v1.2-8572:


version 1.2-8566


Important changes from dig v1.2-8565 to dig v1.2-8566:


version 1.2-8565


Notable changes from dig v1.1-1022 to dig v1.2-8565:


version 1.1-1022


Five notable changes from dig v1.0-1271 to dig v1.1-1022:


version 1.0-1271


Five notable changes from dig v1.0-1263 to dig v1.0-1271:


version 1.0-1263


Five notable changes from dig v1.0-1261 to dig v1.0-1263:


version 1.0-1261


Seven notable changes from dig v0.80-22446 to dig v1.0-1261:


version 0.80-22446


One notable change from dig v0.80-22445 to dig v0.80-22446:


version 0.80-22445


Five notable changes from dig v0.80-21461 to dig v0.80-22445:


version 0.80-21461


Eight notable changes from dig v0.80-18652 to dig v0.80-21461:


version 0.80-18652


One notable change from dig v0.80-18650 to dig v0.80-18652:


version 0.80-18650


Three notable changes from dig v0.80-18500 to dig v0.80-18650:


version 0.80-18500


One notable change from dig v0.80-18480 to dig v0.80-18500:


version 0.80-18480


One notable change from dig v0.80-18409 to dig v0.80-18480:


version 0.80.18409


With dig v0.80-18409:


Limitations and known issues
of the SeedLink server in dig v1.2
Details
Backfill of a historical segment of samples is not supported

In other words, the SeedLink server in dig v1.2 only supports live streaming of samples
In addition to SeedLink DATA commands, SeedLink clients can ask for live streaming of samples using SeedLink TIME commands with zero or one arguments.

However, because SeedLink TIME commands with two arguments are used to ask for a historical segment of samples, the second argument of these SeedLink TIME commands are always ignored by the SeedLink server in dig v1.2. In other words, SeedLink TIME commands with two arguments are always treated as if they were SeedLink TIME commands with only one argument.
Dial-up mode is not supported SeedLink FETCH commands are always rejected. The SeedLink server in dig v1.2 will only operate in “real-time” mode.
The ‘!’ negation character in stream selectors is not supported Negative stream selectors are always rejected. The SeedLink server in dig v1.2 will only accept positive stream selectors.
Leap seconds are not supported
SeedLink handshaking in uni-station mode is not supported IRIS states that “almost all connections are negotiated as multi-station, even if only a single station is requested; uni-station mode, for most publicly accessible servers is deprecated.”
The seedlink_samples_streamer thread polls for new samples instead of being event-driven This software pattern is subobtimal, especially with regards to latency, but this software pattern was much quicker to implement.

Güralp Systems Limited