Monitoring LROC status using mmdiag command

Use the following command to display LROC statistics.

# mmdiag --lroc

LROC Device(s): '090BD5CD603456D2#/dev/nvme1n1;090BD5CD60354659#/dev/nvme0n1;' status Running
Cache inodes 1 dirs 1 data 1  Config: maxFile -1 stubFile -1
Max capacity: 3051313 MB, currently in use: 3559 MB
Statistics starting from: Tue Feb 23 11:42:32 2021

      Inode objects stored 312454 (1220 MB) recalled 157366 (614 MB) = 50.36 %
      Inode objects queried 0 (0 MB) = 0.00 % invalidated 157460 (615 MB)
      Inode objects failed to store 6 failed to recall 0 failed to query 0 failed to inval 0

      Directory objects stored 84 (2 MB) recalled 979 (226 MB) = 1165.48 %
      Directory objects queried 0 (0 MB) = 0.00 % invalidated 80 (6 MB)
      Directory objects failed to store 0 failed to recall 0 failed to query 0 failed to inval 0 inval no recall 0

      Data objects stored 57412 (188807 MB) recalled 10150641 (40597918 MB) = 17680.35 %
      Data objects queried 1 (0 MB) = 100.00 % invalidated 57612 (228070 MB)
      Data objects failed to store 30 failed to recall 407 failed to query 0 failed to inval 0 inval no recall 54307
  
  agent inserts=1074934, reads=162501285
        response times (usec):
        insert min/max/avg=3/8030/121
        read   min/max/avg=1/66717/2919

  ssd   writeIOs=380060, writePages=48671744
        readIOs=10345039194, readPages=10124700092
        response times (usec):
        write  min/max/avg=192/11985/233
        read   min/max/avg=13/49152/225

Use the following command to monitor I/O history of LROC component.

# mmdiag --iohist

=== mmdiag: iohist ===
I/O history:
 I/O start time RW    Buf type disk:sectorNum     nSec  time ms  Type      Device/NSD ID        NSD node
--------------- -- ----------- ----------------- -----  -------  ---- ------------------ ---------------
10:24:37.612888 LR        data   -1:307454520     8192 2163.291   lrc  Maj/Min 000000000
10:24:36.392477 LR        data   -1:307430856     8192 3543.937   lrc  Maj/Min 000000000
10:24:36.283254 LR        data   -1:307429464     8192 3758.281   lrc  Maj/Min 000000000
10:24:36.288204 LR        data   -1:307430160     8192 3912.547   lrc  Maj/Min 000000000
10:24:36.407451 LR        data   -1:307433640     8192 3805.185   lrc  Maj/Min 000000000
10:24:36.398778 LR        data   -1:307431552     8192 3841.871   lrc  Maj/Min 000000000
10:24:36.401041 LR        data   -1:307432248     8192 3842.304   lrc  Maj/Min 000000000
10:24:36.404512 LR        data   -1:307432944     8192 4045.038   lrc  Maj/Min 000000000