ZFS (FreeBSD)
zfs — configures ZFS file systems
leo@iscsitarget:~$ sudo zfs list
NAME USED AVAIL REFER MOUNTPOINT
tank 130K 38.3G 24K /tank
tank/vm-100-disk-0 12K 38.3G 12K -leo@iscsitarget:~$ sudo zfs get readonly tank/vm-100-disk-0
NAME PROPERTY VALUE SOURCE
tank/vm-100-disk-0 readonly off defaultzfs get all tank/vm-100-disk-0zpool – configures ZFS storage pools
root@server:/mnt/vol0 # zpool list
NAME SIZE ALLOC FREE EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT
freenas-boot 18.6G 2.98G 15.6G - - 15% 1.00x ONLINE -
vol0 49T 33.4T 15.6T - 20% 68% 1.00x ONLINE /mnt
root@server:/mnt/vol0 # zpool status vol0
pool: vol0
state: ONLINE
status: Some supported features are not enabled on the pool. The pool can
still be used, but some features are unavailable.
action: Enable all features using 'zpool upgrade'. Once this is done,
the pool may no longer be accessible by software that does not support
the features. See zpool-features(7) for details.
scan: scrub repaired 0 in 1 days 04:42:35 with 0 errors on Mon Oct 7 08:42:37 2019
config:
NAME STATE READ WRITE CKSUM
vol0 ONLINE 0 0 0
raidz2-0 ONLINE 0 0 0
gptid/57e0bcd1-040f-11e7-9b86-002590e0db06 ONLINE 0 0 0
gptid/5adbb3dc-040f-11e7-9b86-002590e0db06 ONLINE 0 0 0
gptid/5dbd43eb-040f-11e7-9b86-002590e0db06 ONLINE 0 0 0
gptid/60869398-040f-11e7-9b86-002590e0db06 ONLINE 0 0 0
gptid/62481aec-040f-11e7-9b86-002590e0db06 ONLINE 0 0 0
gptid/63abafa9-040f-11e7-9b86-002590e0db06 ONLINE 0 0 0
gptid/650d0a87-040f-11e7-9b86-002590e0db06 ONLINE 0 0 0
gptid/65e21e6f-040f-11e7-9b86-002590e0db06 ONLINE 0 0 0
gptid/66aa073a-040f-11e7-9b86-002590e0db06 ONLINE 0 0 0
gptid/86bdab8a-1bc2-11e8-9b42-002590e0db06 ONLINE 0 0 0
gptid/68523974-040f-11e7-9b86-002590e0db06 ONLINE 0 0 0
gptid/fc3b6e7e-5da2-11e8-9b42-002590e0db06 ONLINE 0 0 0
gptid/69e0cb0c-040f-11e7-9b86-002590e0db06 ONLINE 0 0 0
gptid/6ab001f3-040f-11e7-9b86-002590e0db06 ONLINE 0 0 0
gptid/6b7708c9-040f-11e7-9b86-002590e0db06 ONLINE 0 0 0
gptid/6c3f0338-040f-11e7-9b86-002590e0db06 ONLINE 0 0 0
gptid/8d9825c9-1100-11e8-9b42-002590e0db06 ONLINE 0 0 0
gptid/8ed17c5b-1621-11e8-9b42-002590e0db06 ONLINE 0 0 0
errors: No known data errorsroot@server:~ # zpool iostat storage 1
capacity operations bandwidth
pool alloc free read write read write
---------- ----- ----- ----- ----- ----- -----
storage 107G 43.4T 0 1.17K 3.94K 76.5M
storage 107G 43.4T 0 2.69K 0 183M
storage 108G 43.4T 0 2.76K 0 187M
storage 108G 43.4T 0 2.80K 0 190M
storage 108G 43.4T 0 3.22K 0 240M
storage 108G 43.4T 0 3.25K 0 201M
storage 109G 43.4T 0 2.70K 0 183M
storage 109G 43.4T 0 2.86K 0 194M
storage 109G 43.4T 33 2.86K 136K 194M
storage 109G 43.4T 0 2.70K 0 183Mzdb – display zpool debugging and consistency information
zdb -U /data/zfs/zpool.cache -d mypoolZIL/SLOG
Cache for synchronous writes
ZIL: ZFS Intent Log (stored on the pool)
SLOG: Separate ZFS Intent Log (addtional device)
root@server:~ # zilstat
N-Bytes N-Bytes/s N-Max-Rate B-Bytes B-Bytes/s B-Max-Rate ops <=4kB 4-32kB >=32kB
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0ARC/L2ARC
Read cache
ARC: adaptive replacement cache (stored in RAM)
L2ARC: Level 2 adaptive replacement cache (addtional device)
arc_summary.py
arcstat.py