Note: when operating a system with hundreds of millions of files in one directory on XFS and writing thousands of new files a second, it's a good idea to set "noatime,nodiratime" on the mount to keep write latencies low.
Don't ask why... I've been meaning to replace this system for a while now...
Don't ask why... I've been meaning to replace this system for a while now...
November 18, 2024 at 12:35 AM
Note: when operating a system with hundreds of millions of files in one directory on XFS and writing thousands of new files a second, it's a good idea to set "noatime,nodiratime" on the mount to keep write latencies low.
Don't ask why... I've been meaning to replace this system for a while now...
Don't ask why... I've been meaning to replace this system for a while now...
ok guess who fucked up spelling 'noatime'(i wrote 'noatine'... TWICE) in his fstab and had to debug for an hour
meee :3
meee :3
omg proper system hardening is so hard 😭😭😭
i cant even automount LUKS external drives
i cant even automount LUKS external drives
January 22, 2026 at 7:08 PM
ok guess who fucked up spelling 'noatime'(i wrote 'noatine'... TWICE) in his fstab and had to debug for an hour
meee :3
meee :3
I've never met an accountant that understood what `mount -o noatime -t ffs /dev/sd1c /mnt` meant.
November 23, 2024 at 3:05 AM
I've never met an accountant that understood what `mount -o noatime -t ffs /dev/sd1c /mnt` meant.
PERFCET静岡大会ですが、予選全勝2位通過の決戦トーナメント4回戦敗退で、17位タイの結果でした。
プロになって3年で初めてのベスト32👀✨
応援や支援のおかげで腐らず地道にコツコツやってきての結果だとおもいます。結果に満足はしておりません。もっと精進します。
#Secret
#LStyle
#DPL
#Link
#べろ〜家
#newarrow
#Rowdies
#InBusiBull
#メリケンゴリラ
#NoaTime
#NBM
#清水工業
#豚肩ロース生姜焼き
#仙人ジンギスカン
#HealCorps
#ダーツ好きと繋がりたい #ダーツ
プロになって3年で初めてのベスト32👀✨
応援や支援のおかげで腐らず地道にコツコツやってきての結果だとおもいます。結果に満足はしておりません。もっと精進します。
#Secret
#LStyle
#DPL
#Link
#べろ〜家
#newarrow
#Rowdies
#InBusiBull
#メリケンゴリラ
#NoaTime
#NBM
#清水工業
#豚肩ロース生姜焼き
#仙人ジンギスカン
#HealCorps
#ダーツ好きと繋がりたい #ダーツ
March 11, 2024 at 12:45 AM
PERFCET静岡大会ですが、予選全勝2位通過の決戦トーナメント4回戦敗退で、17位タイの結果でした。
プロになって3年で初めてのベスト32👀✨
応援や支援のおかげで腐らず地道にコツコツやってきての結果だとおもいます。結果に満足はしておりません。もっと精進します。
#Secret
#LStyle
#DPL
#Link
#べろ〜家
#newarrow
#Rowdies
#InBusiBull
#メリケンゴリラ
#NoaTime
#NBM
#清水工業
#豚肩ロース生姜焼き
#仙人ジンギスカン
#HealCorps
#ダーツ好きと繋がりたい #ダーツ
プロになって3年で初めてのベスト32👀✨
応援や支援のおかげで腐らず地道にコツコツやってきての結果だとおもいます。結果に満足はしておりません。もっと精進します。
#Secret
#LStyle
#DPL
#Link
#べろ〜家
#newarrow
#Rowdies
#InBusiBull
#メリケンゴリラ
#NoaTime
#NBM
#清水工業
#豚肩ロース生姜焼き
#仙人ジンギスカン
#HealCorps
#ダーツ好きと繋がりたい #ダーツ
But I do know accountants that know what -o user=jake,pass=1234,default,rw,noatime means
November 23, 2024 at 3:21 AM
But I do know accountants that know what -o user=jake,pass=1234,default,rw,noatime means
No, there is no data=journal:
findmnt -o TARGET,SOURCE,FSTYPE,OPTIONS <path>
TARGET SOURCE FSTYPE OPTIONS
<path> /dev/nvme0n1 ext4 rw,noatime,errors=remount-ro,stripe=64
findmnt -o TARGET,SOURCE,FSTYPE,OPTIONS <path>
TARGET SOURCE FSTYPE OPTIONS
<path> /dev/nvme0n1 ext4 rw,noatime,errors=remount-ro,stripe=64
August 30, 2026 at 1:12 AM
No, there is no data=journal:
findmnt -o TARGET,SOURCE,FSTYPE,OPTIONS <path>
TARGET SOURCE FSTYPE OPTIONS
<path> /dev/nvme0n1 ext4 rw,noatime,errors=remount-ro,stripe=64
findmnt -o TARGET,SOURCE,FSTYPE,OPTIONS <path>
TARGET SOURCE FSTYPE OPTIONS
<path> /dev/nvme0n1 ext4 rw,noatime,errors=remount-ro,stripe=64
Thinking about becoming evil and sinister. Perhaps I'll remove `noatime` from my fstab mounts. Bully my drive with writes I'll never look at. how malicious!
November 4, 2025 at 11:40 PM
Thinking about becoming evil and sinister. Perhaps I'll remove `noatime` from my fstab mounts. Bully my drive with writes I'll never look at. how malicious!
Have you tried the usual suspects: mounting the SSD on the server with the noatime option, doing the same with the NFS mount on the client, checking the client-server bandwidth, etc.? Supposedly NFS can perform well, but I've mostly had problems with it. I'd be curious if SSHFS did any better.
December 31, 2023 at 4:07 PM
Have you tried the usual suspects: mounting the SSD on the server with the noatime option, doing the same with the NFS mount on the client, checking the client-server bandwidth, etc.? Supposedly NFS can perform well, but I've mostly had problems with it. I'd be curious if SSHFS did any better.
I can't find where you, @gro-tsen.bsky.social, talked about the noatime option of rsync (blog comments?). I'm sad to report it is broken in the current release, which included in Debian from stable to sid.
bugs.debian.org/cgi-bin/bugr...
bugs.debian.org/cgi-bin/bugr...
I Challenge Thee
bugs.debian.org
February 12, 2026 at 2:37 PM
I can't find where you, @gro-tsen.bsky.social, talked about the noatime option of rsync (blog comments?). I'm sad to report it is broken in the current release, which included in Debian from stable to sid.
bugs.debian.org/cgi-bin/bugr...
bugs.debian.org/cgi-bin/bugr...
Disk Partitioning 2/?
The other reason is mount options. Everything is mounted noatime to reduce disk access. Almost everything gets user_xattr. Some patitions are not mounted automatically: /boot and the cdroms. ordinary users can mount cdroms. Only /usr/and /srv get the dev mount options.
The other reason is mount options. Everything is mounted noatime to reduce disk access. Almost everything gets user_xattr. Some patitions are not mounted automatically: /boot and the cdroms. ordinary users can mount cdroms. Only /usr/and /srv get the dev mount options.
July 17, 2025 at 7:02 PM
Disk Partitioning 2/?
The other reason is mount options. Everything is mounted noatime to reduce disk access. Almost everything gets user_xattr. Some patitions are not mounted automatically: /boot and the cdroms. ordinary users can mount cdroms. Only /usr/and /srv get the dev mount options.
The other reason is mount options. Everything is mounted noatime to reduce disk access. Almost everything gets user_xattr. Some patitions are not mounted automatically: /boot and the cdroms. ordinary users can mount cdroms. Only /usr/and /srv get the dev mount options.
Ext4 va benissimo anche su ssd che supportano fstrim. Tuttavia btrfs nel tempo è decisamente migliorato e con gli adeguati parametri (noatime, compress=zstd, discard=async, space_cache=v2, commit=120 e quando serve nodatacow) va meglio su ssd. Per la manutenzione imposti un cronjob e via.
September 1, 2026 at 8:28 AM
Ext4 va benissimo anche su ssd che supportano fstrim. Tuttavia btrfs nel tempo è decisamente migliorato e con gli adeguati parametri (noatime, compress=zstd, discard=async, space_cache=v2, commit=120 e quando serve nodatacow) va meglio su ssd. Per la manutenzione imposti un cronjob e via.
Au cas où, — c'est toujours délicat de donner des conseils — ma solution sur mes NAS maison est d'avoir le system sur SSD et pour les HDD jouer avec les paramètres de hdparm, notamment l'AAM, un temps d'idle court, monter en noatime, et ne passer updatedb que une fois par mois.
September 28, 2025 at 9:14 PM
Au cas où, — c'est toujours délicat de donner des conseils — ma solution sur mes NAS maison est d'avoir le system sur SSD et pour les HDD jouer avec les paramètres de hdparm, notamment l'AAM, un temps d'idle court, monter en noatime, et ne passer updatedb que une fois par mois.
Try any FS mount options yet? For ext4 I used to use noatime,data=writeback, but it's been a long time since I worked with MySQL though. Also I wouldn't run the latter of the two options in production
If AWS can you provision something faster?
If AWS can you provision something faster?
November 18, 2025 at 5:22 AM
Try any FS mount options yet? For ext4 I used to use noatime,data=writeback, but it's been a long time since I worked with MySQL though. Also I wouldn't run the latter of the two options in production
If AWS can you provision something faster?
If AWS can you provision something faster?
super helpful for external drives.
some commands
udisksctl unlock -b /dev/sdXN
(this returns a dm-N object)
udisksctl mount -o noatime,subvol=@SUBVOL -b /dev/dm-X
udisksctl unmount -b /dev/dm-N
udisksctl lock -b /dev/sdXN
udisksctl power-off -b /dev/sdXN
some commands
udisksctl unlock -b /dev/sdXN
(this returns a dm-N object)
udisksctl mount -o noatime,subvol=@SUBVOL -b /dev/dm-X
udisksctl unmount -b /dev/dm-N
udisksctl lock -b /dev/sdXN
udisksctl power-off -b /dev/sdXN
October 23, 2024 at 1:59 PM
super helpful for external drives.
some commands
udisksctl unlock -b /dev/sdXN
(this returns a dm-N object)
udisksctl mount -o noatime,subvol=@SUBVOL -b /dev/dm-X
udisksctl unmount -b /dev/dm-N
udisksctl lock -b /dev/sdXN
udisksctl power-off -b /dev/sdXN
some commands
udisksctl unlock -b /dev/sdXN
(this returns a dm-N object)
udisksctl mount -o noatime,subvol=@SUBVOL -b /dev/dm-X
udisksctl unmount -b /dev/dm-N
udisksctl lock -b /dev/sdXN
udisksctl power-off -b /dev/sdXN
upon looking into this, i could have saved myself the pain if i had not used relatime on fstab, and instead used noatime
July 28, 2025 at 12:50 AM
upon looking into this, i could have saved myself the pain if i had not used relatime on fstab, and instead used noatime
Optimize MongoDB on Bare Metal
Kill latency spikes on multi-socket rigs via numactl memory interleaving. Disable THP to stop memory freezes, format NVMe to XFS with noatime, & deploy TLS to encrypt pipelines.
🔗 www.servermo.com/howto/optimi...
#MongoDB #SRE
Kill latency spikes on multi-socket rigs via numactl memory interleaving. Disable THP to stop memory freezes, format NVMe to XFS with noatime, & deploy TLS to encrypt pipelines.
🔗 www.servermo.com/howto/optimi...
#MongoDB #SRE
May 28, 2026 at 11:12 AM
Optimize MongoDB on Bare Metal
Kill latency spikes on multi-socket rigs via numactl memory interleaving. Disable THP to stop memory freezes, format NVMe to XFS with noatime, & deploy TLS to encrypt pipelines.
🔗 www.servermo.com/howto/optimi...
#MongoDB #SRE
Kill latency spikes on multi-socket rigs via numactl memory interleaving. Disable THP to stop memory freezes, format NVMe to XFS with noatime, & deploy TLS to encrypt pipelines.
🔗 www.servermo.com/howto/optimi...
#MongoDB #SRE
-
gamemode (adjusts cpu scaling for games and can be invoked with gamemoderun)
vm.swappiness=20 in sysctl.conf (avoid swapping until things get tight)
noatime in fstab (avoid writes when accessing files for minor disk I/O tweak)
gamemode (adjusts cpu scaling for games and can be invoked with gamemoderun)
vm.swappiness=20 in sysctl.conf (avoid swapping until things get tight)
noatime in fstab (avoid writes when accessing files for minor disk I/O tweak)
July 10, 2025 at 10:30 AM
-
gamemode (adjusts cpu scaling for games and can be invoked with gamemoderun)
vm.swappiness=20 in sysctl.conf (avoid swapping until things get tight)
noatime in fstab (avoid writes when accessing files for minor disk I/O tweak)
gamemode (adjusts cpu scaling for games and can be invoked with gamemoderun)
vm.swappiness=20 in sysctl.conf (avoid swapping until things get tight)
noatime in fstab (avoid writes when accessing files for minor disk I/O tweak)
I have noatime on the client, and client-server bandwidth is very very good, but it seems everything stems from suboptimal latency over wifi, so nothing else would perform much better really. As for sshfs I very highly doubt it can be better than anything. SMB might be worth a shot though
December 31, 2023 at 11:03 PM
I have noatime on the client, and client-server bandwidth is very very good, but it seems everything stems from suboptimal latency over wifi, so nothing else would perform much better really. As for sshfs I very highly doubt it can be better than anything. SMB might be worth a shot though
FreeBSD: jail から jail 外の FS を mount する場合
1) /etc/jail.conf に 次のエントリを追加 ( jail "foo" の場合)
mount.fstab = "/usr/jails/foo/etc/fstab";
2) /usr/jails/foo/etc/fstab を設定(Jail の /mnt に jail 外の /data/share をmountする場合)
/data/share /usr/jails/foo/mnt nullfs rw,noatime 0 0
1) /etc/jail.conf に 次のエントリを追加 ( jail "foo" の場合)
mount.fstab = "/usr/jails/foo/etc/fstab";
2) /usr/jails/foo/etc/fstab を設定(Jail の /mnt に jail 外の /data/share をmountする場合)
/data/share /usr/jails/foo/mnt nullfs rw,noatime 0 0
January 9, 2024 at 11:53 AM
FreeBSD: jail から jail 外の FS を mount する場合
1) /etc/jail.conf に 次のエントリを追加 ( jail "foo" の場合)
mount.fstab = "/usr/jails/foo/etc/fstab";
2) /usr/jails/foo/etc/fstab を設定(Jail の /mnt に jail 外の /data/share をmountする場合)
/data/share /usr/jails/foo/mnt nullfs rw,noatime 0 0
1) /etc/jail.conf に 次のエントリを追加 ( jail "foo" の場合)
mount.fstab = "/usr/jails/foo/etc/fstab";
2) /usr/jails/foo/etc/fstab を設定(Jail の /mnt に jail 外の /data/share をmountする場合)
/data/share /usr/jails/foo/mnt nullfs rw,noatime 0 0
mount optionにnoatimeを追加したところ
read: 122MiB/s->170MiB/s
randread: 56.0MiB/s->61.8MiB/s
に向上．
すっかり忘れていたが，nfsではnoatimeだったので条件をそろえればきちんと有意な性能差があることを確認できた．
read: 122MiB/s->170MiB/s
randread: 56.0MiB/s->61.8MiB/s
に向上．
すっかり忘れていたが，nfsではnoatimeだったので条件をそろえればきちんと有意な性能差があることを確認できた．
fioでsize=10GiBで簡易テストをしたが結果が結構残念...
nfs:
seqread: 122MiB/s
seqwrite: 318MiB/s
randread: 50.3MiB/s
randwrite: 339MiB/s
virtiofs:
seqread: 75.5MiB/s
seqwrite: 233MiB/s
randread: 56.0MiB/s
randwrite: 254MiB/s
nfs:
seqread: 122MiB/s
seqwrite: 318MiB/s
randread: 50.3MiB/s
randwrite: 339MiB/s
virtiofs:
seqread: 75.5MiB/s
seqwrite: 233MiB/s
randread: 56.0MiB/s
randwrite: 254MiB/s
なるほど，NW経由でマウントしなくてもいいのか．
こりゃいいぞ
こりゃいいぞ
April 20, 2025 at 4:41 AM
mount optionにnoatimeを追加したところ
read: 122MiB/s->170MiB/s
randread: 56.0MiB/s->61.8MiB/s
に向上．
すっかり忘れていたが，nfsではnoatimeだったので条件をそろえればきちんと有意な性能差があることを確認できた．
read: 122MiB/s->170MiB/s
randread: 56.0MiB/s->61.8MiB/s
に向上．
すっかり忘れていたが，nfsではnoatimeだったので条件をそろえればきちんと有意な性能差があることを確認できた．
Un mount senza noatime, snd & rcv buffer piccoli e altre piccole opzioni possono cambiare notevolmente le performance
June 22, 2026 at 6:45 PM
Un mount senza noatime, snd & rcv buffer piccoli e altre piccole opzioni possono cambiare notevolmente le performance