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Mount /run as tmpfs to stop ~7 GB/day of SD-card writes #16

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Merged
Purple10101 merged 1 commit into from
Aug 24, 2026
+9 −0
Merged

Mount /run as tmpfs to stop ~7 GB/day of SD-card writes #16

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9 changes: 9 additions & 0 deletions docker-compose.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -29,5 +29,14 @@ services:
- RECEIVER_LON=${RECEIVER_LON:-0}
- ADSBLOL_RADIUS=${ADSBLOL_RADIUS:-40}
- PROXY_PORT=3005
# SD-card endurance: run the graphs1090 RRD set from the /run tmpfs below
# and write it back as a single gzipped tarball, instead of 48 scattered
# in-place RRD updates every 60s. Only effective because /run is tmpfs.
- GRAPHS1090_REDUCE_IO=true
tmpfs:
# /run holds volatile runtime state (readsb JSON at 1 Hz, tar1090 chunks,
# graphs1090 PNGs, s6 service dirs) and is tmpfs on any normal install.
# On the container overlay it cost ~7 GB/day of SD-card writes for ~8 KB/min
# of real data. exec is required: s6-overlay execs its service scripts here.
- /run:exec,size=64M
- /var/log:size=32M
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