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Optimize NFS read ahead #1693

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Merged
djeebus merged 4 commits into from
Jan 7, 2026
+8 −0
Merged

Optimize NFS read ahead #1693

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3991c7d
optimize nfs read ahead
djeebus Jan 7, 2026
469f084
wrap path in quotes
djeebus Jan 7, 2026
6841ac7
use udev so it persists across reboots
djeebus Jan 7, 2026
72562a1
add archive.is link
djeebus Jan 7, 2026
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7 changes: 7 additions & 0 deletions iac/provider-gcp/nomad-cluster/scripts/start-client.sh
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Expand Up @@ -85,6 +85,13 @@ sysctl vm.vfs_cache_pressure=50

# TODO: Optimize the mount more according to https://cloud.google.com/filestore/docs/mounting-fileshares
%{ if USE_FILESTORE_CACHE }
# Configure NFS read ahead
cat <<'EOH' >/etc/udev/rules.d/99-nfs.rules
# set read_ahead_kb to 4096 (chunk size), from https://support.vastdata.com/s/document-item?bundleId=z-kb-articles-publications-prod&topicId=6147145742.html&_LANG=enus
SUBSYSTEM=="bdi", ACTION=="add", PROGRAM="/bin/awk -v bdi=$kernel 'BEGIN{ret=1} {if ($4 == bdi) {ret=0}} END{exit ret}' /proc/fs/nfsfs/volumes", ATTR{read_ahead_kb}="4096"
EOH
udevadm control --reload

# Mount NFS
mkdir -p "${NFS_MOUNT_PATH}"
echo "${NFS_IP_ADDRESS}:/store ${NFS_MOUNT_PATH} nfs ${NFS_MOUNT_OPTS} 0 0" | tee -a /etc/fstab
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