qcon london demo tape

Author: shortishly

.gitignore

@@ -6,6 +6,7 @@
 *.db-wal
 *.duckdb
 *.log
+*.mp4
 *~
 .#*
 .*DS_Store

demo/2026-qcon-london-01.tape

@@ -0,0 +1,116 @@
+Output show.mp4
+
+Set FontSize 30
+Set Width 1920
+Set Height 1080
+Set Padding 30
+Set Theme "Builtin Light"
+
+# Set WindowBar Colorful
+# Set WindowBarSize 40
+# Set BorderRadius 8
+
+Hide
+
+Type "pkill tansu"
+Enter
+
+Type@1ms "rm -f tansu.db*"
+Enter@1ms
+
+Type@1ms "rm -rf lake/*"
+Enter@1ms
+
+Type@1ms "cargo build --bin tansu --no-default-features --features libsql,parquet"
+Enter@1ms
+
+Type@1ms "export RUST_LOG=warn"
+Enter@1ms
+
+Type@1ms "alias tansu=target/debug/tansu"
+Enter@1ms
+
+Ctrl+L
+Show
+
+Type "# employee protocol buffer schema"
+Enter
+Type "highlight etc/schema/employee.proto"
+Enter
+Enter
+Sleep 6s
+
+Type "# start broker with schema validation and parquet output"
+Enter
+Type "tansu broker \"
+Enter
+Type "--storage-engine=sqlite://tansu.db \"
+Enter
+Type "--schema-registry=file://./etc/schema \"
+Enter
+Type "parquet --location=file://./lake 2>&1 >broker.log &"
+Enter
+Enter
+Sleep 1
+
+Type "# create employee as a sink topic"
+Enter
+Type "tansu topic create employee --config=tansu.lake.sink=true"
+Enter
+Enter
+Sleep 1
+
+
+Type "# sample employee data"
+Enter
+Type "highlight etc/data/employees.json"
+Enter
+Enter
+Sleep 2s
+
+Type "# produce sample data using protobuf to employee topic"
+Enter
+Type "tansu cat produce employee etc/data/employees.json"
+Enter
+Enter
+Sleep 5s
+
+Type "# lake/{topic}/{partition}/{offset}.parquet"
+Enter
+Type "ls -l lake/employee/0000000000"
+Enter
+Enter
+Sleep 1s
+
+Type "# select produced parquet"
+Enter
+Type `duckdb -box :memory: "SELECT unnest(meta),unnest(key),unnest(value) FROM 'lake/employee/*/*.parquet'"`
+Enter
+Enter
+Sleep 10s
+
+Type "# No Kakfa produced to SQLite"
+Enter
+Type `sqlite3 -box tansu.db "select count(*) from record"`
+Enter
+Enter
+Sleep 5s
+
+Type "# topic metadata has been updated in SQLite"
+Enter
+Type `sqlite3 -box tansu.db "select * from watermark"`
+Enter
+Sleep 5s
+
+Type "# broker memory usage RSS MB"
+Enter
+Type `ps -p $(pgrep tansu) -o rss= | awk '{print $1/1024 " MB"}'`
+Enter
+Sleep 5s
+
+Hide
+Type "pkill tansu"
+Enter
+
+Ctrl+L
+Show