Extended operations codes (opcodes) appear in the output when using esp_subscribe in
verbose mode.
All extended opcode letters are preceded by ESP_OPS. Below is an example of the
ESP_START_SYNC extended
opcode:
ESP_OPS="s"
ESP_START_SYNC- An extended opcode visible when using the subscribe tool with the '-v'
option.
- Indicates that the base data (data in the window available when the
subscription starts) is about to be delivered.
- Represented as the letter 's' when subscribing to Streams, Windows, and
Delta Streams.
ESP_END_SYNC- An extended opcode visible when using the subscribe tool with the '-v'
option.
- Indicates that the base data (data in the window available when the
subscription starts) has been delivered.
- Represented as the letter 'e' when subscribing to Streams, Windows, and
Delta Streams.
ESP_WIPEOUT- An extended opcode visible when using the subscribe tool with the '-v'
option.
- This opcode is received when running in High Availability mode and the
primary server goes down; and you are going to receive a fresh set of base
data from the secondary server.
- Represented as the letter 'w' when subscribing to Streams, Windows, and
Delta Streams.
ESP_STREAM_EXIT- An extended opcode visible when using the subscribe tool with the '-v'
option.
- This opcode is received when the stream that is being subscribed to has
exited. You will no longer receive more data from this Stream/Window/Delta
Stream.
- Represented as the letter 'X' when subscribing to Streams, Windows, and
Delta Streams.
ESP_DATA_LOST- An extended opcode visible when using the subscribe tool with the '-v'
option.
- This opcode is received when subscribing to data in lossy mode. The server
purges some data because the subscribe tool is not able to keep up with the
server.
- Represented as the letter 'l' (lowercase L) when subscribing to Streams,
Windows, and Delta Streams.