Using Update Mode

Running in experimental Update mode enables using osm2pgsql's --append option.

Note: This is not the --append option that existed in PgOSM Flex 0.6.3 and prior.

Testing steps

Important -- Needs higher max connections!

docker stop pgosm && docker build -t rustprooflabs/pgosm-flex .
docker run --name pgosm -d --rm \
    -v ~/pgosm-data:/app/output \
    -v /etc/localtime:/etc/localtime:ro \
    -e POSTGRES_PASSWORD=$POSTGRES_PASSWORD \
    -p 5433:5432 -d rustprooflabs/pgosm-flex \
    -c max_connections=300

Run fresh import w/ D.C. using --update create. This ensures osm2pgsql uses --slim w/out --drop. Tested from commit 672d9fd.

time docker exec -it \
    pgosm python3 docker/pgosm_flex.py \
    --ram=8 \
    --region=north-america/us \
    --subregion=district-of-columbia \
    --skip-nested --skip-dump \
    --update create

...

2022-12-27 09:02:37,654:INFO:pgosm-flex:helpers:PgOSM-Flex version:	0.6.3	672d9fd

...

real	0m43.904s
user	0m0.020s
sys	0m0.012s

Run with a second sub-region using --update append.

time docker exec -it \
    pgosm python3 docker/pgosm_flex.py \
    --ram=8 \
    --region=north-america/us \
    --subregion=new-hampshire \
    --skip-nested --skip-dump \
    --update append

...

2022-12-27 10:14:26,792:INFO:pgosm-flex:helpers:2022-12-27 10:14:26  osm2pgsql took 1420s (23m 40s) overall.
2022-12-27 10:14:26,832:INFO:pgosm-flex:pgosm_flex:osm2pgsql completed
2022-12-27 10:14:26,832:INFO:pgosm-flex:pgosm_flex:Running with --update append: Skipping post-processing SQL
2022-12-27 10:14:26,832:INFO:pgosm-flex:pgosm_flex:Skipping pg_dump
2022-12-27 10:14:26,832:INFO:pgosm-flex:pgosm_flex:PgOSM Flex complete!

real	23m47.564s
user	0m0.083s
sys	0m0.025s

It seems to work, new output at the end: Skipping post-processing SQL.

Verified that both New Hampshire and D.C. regions were loaded in osm.place_polygon.

Smaller test

Put the following into ~/pgosm-data/extracts/colorado-extract.json:

{
    "directory": "/home/ryanlambert/pgosm-data/",
    "extracts": [
        {
            "output": "colorado-boulder-latest.osm.pbf",
            "description": "Area extracted around Boulder, Colorado",
            "bbox": {
                "left": -105.30,
                "right": -105.20,
                "top": 40.07,
                "bottom": 39.98
            }
        },
        {
            "output": "colorado-longmont-latest.osm.pbf",
            "description": "Area extracted around Longmont, Colorado",
            "bbox": {
                "left": -105.15,
                "right": -105.05,
                "top": 40.21,
                "bottom": 40.12
            }
        }
    ]
}

Create Boulder and Longmont extracts.

osmium extract -c extracts/colorado-extracts.json colorado-2022-12-27.osm.pbf

ryanlambert@tag201:~/pgosm-data$ ls -alh | grep boulder
-rw-rw-r--  1 ryanlambert ryanlambert 2.4M Dec 27 14:31 colorado-boulder-latest.osm.pbf
ryanlambert@tag201:~/pgosm-data$ ls -alh | grep longmont
-rw-rw-r--  1 ryanlambert ryanlambert 988K Dec 27 14:31 colorado-longmont-latest.osm.pbf

Takes 11 seconds.

time docker exec -it \
    pgosm python3 docker/pgosm_flex.py \
    --ram=8 \
    --region=north-america/us \
    --subregion=colorado-longmont --input-file colorado-longmont-latest.osm.pbf \
    --skip-dump --update create

Takes 2 minutes.

time docker exec -it \
    pgosm python3 docker/pgosm_flex.py \
    --ram=8 \
    --region=north-america/us \
    --subregion=colorado-boulder --input-file colorado-boulder-latest.osm.pbf \
    --skip-dump --update append