age_buffer_centisecs

age_buffer_centisecs:(Min: 100 Default: 1500 Max: 720000) 多長時間設置為臟數據

xfsbufd_centisecs

xfsbufd_centisecs: (Min: 50 Default: 100Max: 3000)xfsbufd掃瞄臟buffer的時間間隔

xfssyncd_centisecs

xfssyncd_centisecs: (Min: 100 Default: 3000 Max: 720000)xfssyncd 刷新時間間隔（寫到磁盤）

XFS sysctls - Debug

error_level (Min: 0 Default: 3 Max: 11)

文件系統出錯時會顯示詳細信息

– A volume knob for error reporting when internal errors occur.

– This will generate detailed messages & backtraces for filesystem shutdowns, for example.

– Current threshold（閥值） values are:

? XFS_ERRLEVEL_OFF: 0

? XFS_ERRLEVEL_LOW: 1

? XFS_ERRLEVEL_HIGH: 5

panic_mask (Min: 0 Default: 0 Max: 127)

遇到指定的錯誤時調用BUG()(調試時用)

? XFS_NO_PTAG 0

? XFS_PTAG_IFLUSH 0x00000001

? XFS_PTAG_LOGRES 0x00000002

? XFS_PTAG_AILDELETE 0x00000004

? XFS_PTAG_ERROR_REPORT 0x00000008

? XFS_PTAG_SHUTDOWN_CORRUPT 0x00000010

? XFS_PTAG_SHUTDOWN_IOERROR 0x00000020

? XFS_PTAG_SHUTDOWN_LOGERROR 0x00000040

? This option is intended for debugging only.

XFS sysctls - Compatibility

irix_symlink_mode (Min: 0 Default: 0 Max: 1)

控制符號鏈接的模式是不是0777（默認）

irix_sgid_inherit (Min: 0 Default: 0 Max: 1)

把一個和文件夾不是同一個組ID的文件，放在這個文件夾里。組ID會不會變成文件夾的組ID。（默認不會）

XFS sysctls – Attribute Inheritence

inherit_sync (Min: 0 Default: 1 Max: 1)

xfs_io 下chattr 命令設置sync標志

– Setting this to "1" will cause the "sync" flag set by the xfs_io(8) chattr command on a

directory to be inherited by files in that directory.

inherit_nodump (Min: 0 Default: 1 Max: 1)

xfs_io 下chattr 命令設置nodump標志

– Setting this to "1" will cause the "nodump" flag set by the xfs_io(8) chattr command

on a directory to be inherited by files in that directory.

inherit_noatime (Min: 0 Default: 1 Max: 1)

xfs_io 下chattr 命令設置noatime標志

– Setting this to "1" will cause the "noatime" flag set by the xfs_io(8) chattr command

on a directory to be inherited by files in that directory.

inherit_nosymlinks (Min: 0 Default: 1 Max: 1)

xfs_io 下chattr 命令設置nosymlinks標志

– Setting this to "1" will cause the "nosymlinks" flag set by the xfs_io(8) chattr

command on a directory to be inherited by files in that directory.

XFS sysctls - Misc

stats_clear (Min: 0 Default: 0 Max: 1)

清除狀態信息

設為1的話，會清除xfs系統累積的狀態，并馬上重置為0

restrict_chown (Min: 0 Default: 1 Max: 1)

控制的用戶是否能夠用chown來改變，文件的擁有者

總結

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