Who can help me explain the meaning of the fields in this table？

[linbing]

root@truenas:~ # zdb -Lbbb -U /data/zfs/zpool.cache datapool

Traversing all blocks ...

48.7T completed (7152MB/s) estimated time remaining: 0hr 00min 11sec
bp count: 528407438
ganged count: 0
bp logical: 67689713536512 avg: 128101
bp physical: 53558335489536 avg: 101358 compression: 1.26
bp allocated: 53626860281856 avg: 101487 compression: 1.26
bp deduped: 0 ref>1: 0 deduplication: 1.00
Normal class: 52533407145984 used: 51.38%
Special class 1121282232320 used: 75.02%

additional, non-pointer bps of type 0: 57892
number of (compressed) bytes: number of bps
17: 2015 ********
18: 43 *
19: 184 *
20: 14 *
21: 25 *
22: 85 *
23: 45 *
24: 10980 ****************************************
25: 6 *
26: 6 *
27: 6 *
28: 19 *
29: 50 *
30: 2 *
31: 10 *
32: 194 *
33: 1841 *******
34: 14 *
35: 7 *
36: 2 *
37: 0
38: 1 *
39: 1 *
40: 2 *
41: 11 *
42: 20 *
43: 4 *
44: 11 *
45: 1630 ******
46: 7 *
47: 4 *
48: 2 *
49: 6 *
50: 419 **
51: 11 *
52: 30 *
53: 119 *
54: 32 *
55: 56 *
56: 120 *
57: 72 *
58: 85 *
59: 87 *
60: 1797 *******
61: 323 **
62: 1116 *****
63: 897 ****
64: 550 ***
65: 1834 *******
66: 735 ***
67: 1081 ****
68: 1322 *****
69: 768 ***
70: 2657 **********
71: 1476 ******
72: 1069 ****
73: 1044 ****
74: 1145 *****
75: 1131 *****
76: 6539 ************************
77: 1101 *****
78: 971 ****
79: 2258 *********
80: 539 **
81: 188 *
82: 424 **
83: 331 **
84: 357 **
85: 108 *
86: 132 *
87: 221 *
88: 397 **
89: 446 **
90: 279 **
91: 166 *
92: 1672 *******
93: 232 *
94: 162 *
95: 67 *
96: 73 *
97: 427 **
98: 380 **
99: 129 *
100: 91 *
101: 97 *
102: 96 *
103: 86 *
104: 90 *
105: 103 *
106: 119 *
107: 194 *
108: 1624 ******
109: 98 *
110: 208 *
111: 148 *
112: 116 *
Dittoed blocks on same vdev: 1137087
indirect vdev id 16 has 710843 segments (694K in memory)

Blocks LSIZE PSIZE ASIZE avg comp %Total Type
- - - - - - - unallocated
2 32K 8K 24K 12K 4.00 0.00 object directory
16 512K 64K 192K 12K 8.00 0.00 L1 object array
100 50K 50K 1.17M 12K 1.00 0.00 L0 object array
116 562K 114K 1.36M 12K 4.93 0.00 object array
1 16K 4K 12K 12K 4.00 0.00 packed nvlist
- - - - - - - packed nvlist size
- - - - - - - bpobj
- - - - - - - bpobj header
- - - - - - - SPA space map header
136 2.12M 544K 1.59M 12K 4.00 0.00 L1 SPA space map
12.4K 1.55G 143M 428M 34.6K 11.11 0.00 L0 SPA space map
12.5K 1.55G 143M 430M 34.3K 11.09 0.00 SPA space map
8 136K 136K 136K 17K 1.00 0.00 ZIL intent log
10 1.25M 40K 80K 8K 32.00 0.00 L5 DMU dnode
10 1.25M 40K 80K 8K 32.00 0.00 L4 DMU dnode
10 1.25M 40K 80K 8K 32.00 0.00 L3 DMU dnode
11 1.38M 88K 180K 16.4K 16.00 0.00 L2 DMU dnode
849 106M 40.1M 80.4M 96.9K 2.65 0.00 L1 DMU dnode
772K 12.1G 3.36G 6.73G 8.92K 3.59 0.01 L0 DMU dnode
773K 12.2G 3.40G 6.80G 9.02K 3.58 0.01 DMU dnode
11 44K 44K 92K 8.36K 1.00 0.00 DMU objset
- - - - - - - DSL directory
13 6.50K 1K 24K 1.85K 6.50 0.00 DSL directory child map
- - - - - - - DSL dataset snap map
23 322K 80K 240K 10.4K 4.02 0.00 DSL props
- - - - - - - DSL dataset
- - - - - - - ZFS znode
- - - - - - - ZFS V0 ACL
677 21.2M 2.64M 5.29M 8K 8.00 0.00 L3 ZFS plain file
88.3K 2.76G 384M 768M 8.69K 7.36 0.00 L2 ZFS plain file
6.35M 203G 39.8G 79.5G 12.5K 5.11 0.16 L1 ZFS plain file
497M 61.3T 48.7T 48.7T 100K 1.26 99.82 L0 ZFS plain file
503M 61.5T 48.7T 48.8T 99.3K 1.26 99.98 ZFS plain file
4 128K 16K 32K 8K 8.00 0.00 L2 ZFS directory
13.6K 434M 54.3M 109M 8.01K 7.99 0.00 L1 ZFS directory
175K 1.61G 692M 1.46G 8.56K 2.38 0.00 L0 ZFS directory
188K 2.03G 746M 1.57G 8.52K 2.79 0.00 ZFS directory
10 10K 10K 80K 8K 1.00 0.00 ZFS master node
- - - - - - - ZFS delete queue
- - - - - - - zvol object
- - - - - - - zvol prop
- - - - - - - other uint8[]
- - - - - - - other uint64[]
- - - - - - - other ZAP
- - - - - - - persistent error log
1 128K 12K 36K 36K 10.67 0.00 SPA history
- - - - - - - SPA history offsets
- - - - - - - Pool properties
- - - - - - - DSL permissions
- - - - - - - ZFS ACL
- - - - - - - ZFS SYSACL
- - - - - - - FUID table
- - - - - - - FUID table size
1 1.50K 1.50K 12K 12K 1.00 0.00 DSL dataset next clones
- - - - - - - scan work queue
30 17K 3.50K 24K 819 4.86 0.00 ZFS user/group/project used
- - - - - - - ZFS user/group/project quota
- - - - - - - snapshot refcount tags
- - - - - - - DDT ZAP algorithm
- - - - - - - DDT statistics
7 3.50K 3.50K 56K 8K 1.00 0.00 System attributes
- - - - - - - SA master node
10 15K 15K 80K 8K 1.00 0.00 SA attr registration
20 320K 80K 160K 8K 4.00 0.00 SA attr layouts
- - - - - - - scan translations
- - - - - - - deduplicated block
- - - - - - - DSL deadlist map
- - - - - - - DSL deadlist map hdr
1 1.50K 1.50K 12K 12K 1.00 0.00 DSL dir clones
- - - - - - - bpobj subobj
- - - - - - - deferred free
- - - - - - - dedup ditto
3 96K 16K 48K 16K 6.00 0.00 L1 other
293 22.7M 10.7M 32.0M 112K 2.13 0.00 L0 other
296 22.8M 10.7M 32.1M 111K 2.13 0.00 other
10 1.25M 40K 80K 8K 32.00 0.00 L5 Total
10 1.25M 40K 80K 8K 32.00 0.00 L4 Total
687 22.4M 2.68M 5.37M 8K 8.35 0.00 L3 Total
88.3K 2.76G 384M 768M 8.70K 7.36 0.00 L2 Total
6.36M 204G 39.8G 79.7G 12.5K 5.11 0.16 L1 Total
497M 61.4T 48.7T 48.7T 100K 1.26 99.84 L0 Total
504M 61.6T 48.7T 48.8T 99.1K 1.26 100.00 Total

Block Size Histogram

block psize lsize asize
size Count Size Cum. Count Size Cum. Count Size Cum.
512: 56.1K 28.0M 28.0M 56.1K 28.0M 28.0M 0 0 0
1K: 281K 338M 367M 281K 338M 367M 0 0 0
2K: 160K 430M 797M 160K 430M 797M 0 0 0
4K: 7.52M 30.3G 31.1G 170K 920M 1.68G 2.55M 10.2G 10.2G
8K: 6.74M 71.0G 102G 286K 3.15G 4.83G 10.1M 91.4G 102G
16K: 14.3M 309G 411G 1.22M 23.4G 28.2G 16.2M 351G 453G
32K: 54.4M 2.69T 3.09T 10.1M 393G 422G 54.0M 2.66T 3.11T
64K: 162M 13.4T 16.5T 7.40M 637G 1.03T 163M 13.4T 16.5T
128K: 258M 32.3T 48.7T 484M 60.5T 61.6T 258M 32.3T 48.8T

 

[artlessknave]

I have no idea what that is...but the people who might know are less likely to reply because you didn't use code blocks at all, which is a basic requirement in the forum rules, and that is super hard to read.