Administrace komentářů

FEATURE FLAGS
              The feature flags are split into three categories, namely, Compat, Incompat and RO Compat.

              Compat, or compatible, is a feature that the file system does not  need  to  fully  understand  to
              safely  read/write  to  the  volume. An example of this is the backup-super feature that added the
              capability to backup the super block in multiple locations in the file system. As the backup super
              blocks  are  typically not read nor written to by the file system, an older file system can safely
              mount a volume with this feature enabled.

              Incompat, or incompatible, is a feature  that  the  file  system  needs  to  fully  understand  to
              read/write to the volume. Most features fall under this category.

              RO Compat, or read-only compatible, is a feature that the file system needs to fully understand to
              write to the volume. Older software can safely read a volume with this feature enabled. An example
              of  this  would  be  user and group quotas. As quotas are manipulated only when the file system is
              written to, older software can safely mount such volumes in read-only mode.

o2info --volinfo /dev/sda
       Label: myocfs2
        UUID: 7EA9B285164443FE97FD55D02F890FCB
  Block Size: 4096
Cluster Size: 524288
  Node Slots: 8
    Features: backup-super strict-journal-super sparse extended-slotmap 
    Features: inline-data xattr indexed-dirs refcount discontig-bg clusterinfo 
    Features: append-dio unwritten 

o2info --freeinode /dev/sda
Slot		Space		Free
  0	         1024	         341
  1	         1024	         834
  2	            0	           0
  3	            0	           0
  4	            0	           0
  5	            0	           0
  6	            0	           0
  7	            0	           0
Total	         2048	        1175

o2info --freefrag 524288 /dev/sda
Blocksize: 4096 bytes
Clustersize: 524288 bytes
Total clusters: 2805674
Free clusters: 870536 (31.0%)

Min. free extent: 512 KB 
Max. free extent: 15872 KB
Avg. free extent: 2048 KB

Chunksize: 536870912 bytes (1024 clusters)
Total chunks: 2740
Free chunks: 0 (0.0%)

HISTOGRAM OF FREE EXTENT SIZES:
Extent Size Range :  Free extents  Free Clusters  Percent
  512K... 1024K-  :         61251         61251    7.04%
    1M...    2M-  :         46362        110734   12.72%
    2M...    4M-  :         43332        230561   26.48%
    4M...    8M-  :         30888        335973   38.59%
    8M...   16M-  :          6083        132017   15.17%

o2info --filestat /var/lib/libvirt/images/
  File: /var/lib/libvirt/images/
  Size: 3896      	Blocks: 8          IO Block: 4096   directory
Device: 800h/2048d	Inode: 8257681     Links: 5
 Frag%: 0.00      	Clusters: 0        Extents: 1      Score: 0
Shared: 0         	Unwritten: 0       Holes: 0        Xattr: 0
Access: (0750/drwxr-x---)  Uid: (64055/libvirt-qemu)   Gid: (64055/libvirt-qemu)
Access: 2025-03-10 23:52:32.800091216 +0100
Modify: 2025-03-11 02:05:20.30629001
Change: 2025-03-11 02:05:20.30629001