xfs_info

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طريقة الكتابة

xfs_info [-t MTAB] MOUNTPOINT | DEVICE | IMAGE

الأكثر استخدامًا

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$ مستخدم عادي# بصلاحية root (أو مع sudo)

1. 1Show a mounted XFS

   #xfs_info /
   meta-data=/dev/mapper/rhel-root isize=512    agcount=4, agsize=1113856 blks
   data     =                       bsize=4096   blocks=4455424, imaxpct=25

   isize = inode size, bsize = block size.

2. 2By device

   #xfs_info /dev/vdb1

   Also works unmounted in newer xfsprogs.

3. 3Check reflink support (fast copies)

   #xfs_info /data | grep -o 'reflink=[01]'
   reflink=1

   cp --reflink makes instant copies.

4. 4Check bigtime (dates after 2038)

   #xfs_info /data | grep -o 'bigtime=[01]'

   1 = ready for 2038.

5. 5Size before and after growing

   #xfs_info /data | grep ^data; xfs_growfs /data; xfs_info /data | grep ^data

   The blocks value grows.

6. 6Log (journal) size

   #xfs_info /data | grep ^log

   Bigger logs help heavy metadata work.

7. 7Compare two servers

   $ssh server2 xfs_info / | diff - <(xfs_info /)

   Find different creation settings.

8. 8Is it really XFS?

   $findmnt -no FSTYPE /data
   xfs

   xfs_info fails on other types.

9. 9Data for capacity reports

   #xfs_info /data | awk -F'[ =,]+' '/^data/ {print $3*$5/1024/1024/1024 " GiB"}'

   blocks × block size.

10. 10Use xfs_spaceman for free space details

    #xfs_spaceman -c 'freesp -s' /data

    Fragmentation of free space.

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