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ディレクトリ内のファイル数の上限【Google Compute Engine】

Last updated at Posted at 2022-04-20

TL;DR

10GBの場合、約57万個(575444)ファイルを作成できる。30GBならその3倍作成できる。
Screenshot from 2022-04-20 07-13-04.png
us-west1e2-microで試しました

/dev/sda1IFreeで残りのファイル数(575308)の上限を確認できる。

$ df -i
Filesystem     Inodes IUsed  IFree IUse% Mounted on
udev           123900   297 123603    1% /dev
tmpfs          126223   378 125845    1% /run
/dev/sda1      647168 71860 575308   12% /
tmpfs          126223     1 126222    1% /dev/shm
tmpfs          126223     3 126220    1% /run/lock
tmpfs          126223    17 126206    1% /sys/fs/cgroup
/dev/sda15          0     0      0     - /boot/efi
tmpfs          126223    10 126213    1% /run/user/1000

575444個目までは問題なくファイルを作成できる

2時間ほど実行にかかります

for i in `seq 575444`; do touch $i; done

ファイル作成後

$ df -i
Filesystem     Inodes  IUsed  IFree IUse% Mounted on
udev           123900    297 123603    1% /dev
tmpfs          126223    378 125845    1% /run
/dev/sda1      647168 647168      0  100% /
tmpfs          126223      1 126222    1% /dev/shm
tmpfs          126223      3 126220    1% /run/lock
tmpfs          126223     17 126206    1% /sys/fs/cgroup
/dev/sda15          0      0      0     - /boot/efi
tmpfs          126223     10 126213    1% /run/user/1000

image.png

575445個目を作成しようとするとNo space left on deviceになる

$ touch 575445
touch: cannot touch '575445': No space left on device

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