Raster Tile Data

See the source code: FITS | CASA | HDF5

Measures bulk raster tile delivery throughput by requesting 54 tiles at a higher zoom level after the initial image load. The elapsed time is measured between the ADD_REQUIRED_TILES request and the last RASTER_TILE_DATA response.

skinparam style strictuml hide footbox title PERF_RASTER_TILE_DATA box "Client (Test Runner)" #EDEDED participant Client end box box "Server (Backend)" #lightblue participant Backend end box == Step 1: Open file and load 1 initial tile == Client -> Backend : OPEN_FILE activate Backend Client <-- Backend : OPEN_FILE_ACK Client <-- Backend : REGION_HISTOGRAM_DATA deactivate Backend Client -> Backend : ADD_REQUIRED_TILES (1 tile) activate Backend Client -> Backend : SET_CURSOR (x=1, y=1) Client -> Backend : SET_SPATIAL_REQUIREMENTS Client <-- Backend : RASTER_TILE_DATA (1 tile + sync start/end) Client <-- Backend : SPATIAL_PROFILE_DATA deactivate Backend == Step 2: Request 54 tiles at higher MIP level == note over Client, Backend **Timeout starts (readFile: 10,000 ms)** end note Client -[#red]> Backend : <font color="red">ADD_REQUIRED_TILES</font> (54 tiles, ZFP q=11) activate Backend note right of Backend #FFEEEE <font color="red">Elapsed time measurement starts end note Client <--[#red] Backend : <font color="red">RASTER_TILE_DATA (54 tiles + sync start/end)</font> deactivate Backend note right of Backend #FFEEEE <font color="red">Elapsed time measurement ends end note note over Client **Assert:** RASTER_TILE_DATA count = 54 + 2 end note

  1. Frontend opens cube_B_06400_z00100.<fits|image|hdf5> and loads 1 initial tile

  2. Frontend sends: ADD_REQUIRED_TILES (54 tiles at higher MIP level)

    tiles = [67125252, 67129348, 67125253, ... (54 tiles)]
compression_type = ZFP
compression_quality = 11

  3. Backend returns: RASTER_TILE_DATA stream

Check 1: within the readFile timeout (10,000 ms):

  • RASTER_TILE_DATA stream length = 54 + 2 (54 tiles + RasterTileSync start and end)