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qbt: things

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This commit is contained in:
Simon Gardling
2026-03-15 02:50:19 -04:00
parent 4d1ec4b6e1
commit 6318e90a36
1 changed files with 9 additions and 18 deletions
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27
services/qbittorrent.nix
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@@ -54,11 +54,11 @@
serverConfig.BitTorrent = {
Session = {
MaxConnectionsPerTorrent = 100;
MaxUploadsPerTorrent = 15;
MaxUploadsPerTorrent = 50;
MaxConnections = -1;
MaxUploads = -1;
MaxActiveCheckingTorrents = 2; # reduce disk pressure from concurrent hash checks
MaxActiveCheckingTorrents = 2;
# queueing
QueueingSystemEnabled = true;
@@ -89,7 +89,7 @@
inherit (config.services.qbittorrent.serverConfig.Preferences.Downloads) TempPath;
TempPathEnabled = true;
ConnectionSpeed = 100;
ConnectionSpeed = 200; # half-open connections/s; faster peer discovery
SaveResumeDataInterval = 300; # save resume data every 5 min (default 60s)
ResumeDataStorageType = "SQLite"; # SQLite is more efficient than legacy per-file .fastresume storage
@@ -100,29 +100,20 @@
DisableAutoTMMTriggers.DefaultSavePathChanged = false;
ChokingAlgorithm = "RateBased";
SeedChokingAlgorithm = "FastestUpload"; # unchoke peers we upload to fastest
PieceExtentAffinity = true;
SuggestMode = true;
# max_queued_disk_bytes: the max bytes waiting in the disk I/O queue.
# When this limit is reached, peer connections stop reading from their
# sockets until the disk thread catches up -- causing the spike-then-zero
# pattern. Default is 1MB; high_performance_seed() uses 7MB.
# 64MB is above the preset but justified for slow raidz1 HDD random writes
# where ZFS txg commits cause periodic I/O stalls.
DiskQueueSize = 67108864; # 64MB
# POSIX-compliant disk I/O: uses pread/pwrite instead of mmap.
# On ZFS, mmap forces data into BOTH ARC and Linux page cache (double-caching),
# wasting RAM. pread/pwrite goes only through ARC, maximizing its effectiveness.
# Saved 26 gb of memory!!
DiskIOType = "Posix";
# === Network buffer tuning (from libtorrent high_performance_seed preset) ===
# "always stuff at least 1 MiB down each peer pipe, to quickly ramp up send rates"
SendBufferLowWatermark = 1024; # 1MB (KiB) -- matches high_performance_seed
# "of 500 ms, and a send rate of 4 MB/s, the upper limit should be 2 MB"
SendBufferWatermark = 3072; # 3MB (KiB) -- matches high_performance_seed
# "put 1.5 seconds worth of data in the send buffer"
FilePoolSize = 500; # keep more files open to reduce open/close overhead
AioThreads = 24; # 6 cores * 4; better disk I/O parallelism
SendBufferLowWatermark = 512; # 512 KiB -- trigger reads sooner to prevent upload stalls
SendBufferWatermark = 3072; # 3 MiB -- matches high_performance_seed
SendBufferWatermarkFactor = 150; # percent -- matches high_performance_seed
};