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Redis "volatile-lru" cache #407

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Redis "volatile-lru" cache #407

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b80a860
build: Bump `large-image` version
annehaley Jun 25, 2026
60cd551
feat: Re-enable redis cache for large-image
annehaley Jun 25, 2026
9707ebe
feat: Set redis max memory policy to "volatile-lru"
annehaley Jun 25, 2026
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1 change: 1 addition & 0 deletions docker-compose.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -48,6 +48,7 @@ services:

redis:
image: redis:alpine
command: ["redis-server", "--maxmemory", "4096MB", "--maxmemory-policy", "volatile-lru"]
healthcheck:
test: ["CMD", "redis-cli", "ping"]
start_period: 30s
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4 changes: 2 additions & 2 deletions pyproject.toml
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Expand Up @@ -33,8 +33,8 @@ dependencies = [
# Needed for GeoDjango and "large-image[gdal]"
'gdal==3.12.3.1',
"geopandas==1.1.3",
"large-image-converter==1.34.1",
"large-image[gdal]==1.34.1",
"large-image-converter==1.34.3",
"large-image[gdal]==1.34.3",
"matplotlib==3.10.9", # for raster colormaps
"networkx==3.6.1",
"numpy==2.4.3",
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4 changes: 4 additions & 0 deletions terraform/django.tf
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Expand Up @@ -40,6 +40,10 @@ module "django" {
resource "heroku_addon" "redis" {
app_id = module.django.heroku_app_id
plan = "heroku-redis:mini"

config = {
maxmemory_policy = "volatile-lru"
}
}

output "dns_nameservers" {
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34 changes: 17 additions & 17 deletions uv.lock
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4 changes: 4 additions & 0 deletions uvdat/settings/base.py
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Expand Up @@ -157,6 +157,10 @@
}
}

# Large image cache with Redis
LARGE_IMAGE_CACHE_BACKEND = "redis"
LARGE_IMAGE_CACHE_REDIS_URL = env.url("DJANGO_REDIS_URL").geturl()

@brianhelba brianhelba Jun 26, 2026

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Where do we control the Redis database number here?

We're using Redis for other things, so I think we should have local control of this.


UVDAT_WEB_URL: str = env.url("DJANGO_UVDAT_WEB_URL").geturl()
UVDAT_ENABLE_FLOOD_SIMULATION: bool = env.bool("DJANGO_UVDAT_ENABLE_FLOOD_SIMULATION", default=True)
UVDAT_ENABLE_FLOOD_NETWORK_FAILURE: bool = env.bool(
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