Constellation, Spacedust, Slingshot, UFOs: atproto crates and services for microcosm
slingshot: add configurable cache sizes, host, and ports
- Add --cache-memory-mb and --cache-disk-gb flags
authored by
phil
and committed by
tangled.org
(Feb 2, 2026, 6:54 PM UTC)
eeb94d8a
d3d84a6e
+18
-3
+4
-2
slingshot/src/firehose_cache.rs
+4
-2
slingshot/src/firehose_cache.rs
···
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pub async fn firehose_cache(
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cache_dir: impl AsRef<Path>,
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memory_mb: usize,
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disk_gb: usize,
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) -> Result<HybridCache<String, CachedRecord>, String> {
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let cache = HybridCacheBuilder::new()
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.with_name("firehose")
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.memory(64 * 2_usize.pow(20))
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.memory(memory_mb * 2_usize.pow(20))
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.with_weighter(|k: &String, v| k.len() + std::mem::size_of_val(v))
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.storage(Engine::large())
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.with_device_options(
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DirectFsDeviceOptions::new(cache_dir)
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.with_capacity(2_usize.pow(30)) // TODO: configurable (1GB to have something)
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.with_capacity(disk_gb * 2_usize.pow(30))
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.with_file_size(16 * 2_usize.pow(20)), // note: this does limit the max cached item size, warning jumbo records
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)
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.build()
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-1
slingshot/src/main.rs
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slingshot/src/main.rs
···
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#[arg(long, env = "SLINGSHOT_BIND")]
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#[clap(default_value = "0.0.0.0:8080")]
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bind: std::net::SocketAddr,
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/// memory cache size in megabytes
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#[arg(long, env = "SLINGSHOT_CACHE_MEMORY_MB")]
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#[clap(default_value_t = 64)]
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cache_memory_mb: usize,
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/// disk cache size in gigabytes
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#[arg(long, env = "SLINGHSOT_CACHE_DISK_DB")]
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#[clap(default_value_t = 1)]
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cache_disk_gb: usize,
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/// the domain pointing to this server
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///
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/// if present:
···
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log::info!("cache dir ready at at {cache_dir:?}.");
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log::info!("setting up firehose cache...");
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let cache = firehose_cache(cache_dir.join("./firehose")).await?;
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let cache = firehose_cache(
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cache_dir.join("./firehose"),
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args.cache_memory_mb,
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args.cache_disk_gb,
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)
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.await?;
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log::info!("firehose cache ready.");
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let mut tasks: tokio::task::JoinSet<Result<(), MainTaskError>> = tokio::task::JoinSet::new();