Hi,
bcache-status renders some weird output:
- "Total Cache Used" and "Total Cache Unused" don't always add up to
"Total Cache Size"
- "Dirty Data" is -6 MB?
Seems like bugs to me. Details below.
Rolf
[root@localhost bcache]# bcache-status -s
--- bcache ---
UUID c318c0b2-0b69-4f66-a729-23b82a9d0e91
Block Size 0.00KiB
Bucket Size 512.00KiB
Congested? False
Read Congestion 2.0ms
Write Congestion 20.0ms
Total Cache Size 1.00GiB
Total Cache Used 20.00MiB (1%)
Total Cache Unused 1.00GiB (99%)
Dirty Data 0B (0%)
Evictable Cache 1.00GiB (100%)
Replacement Policy [lru] fifo random
Cache Mode [writethrough] writeback writearound none
Total Hits 122 (100%)
Total Misses 0
Total Bypass Hits 0
Total Bypass Misses 0
Total Bypassed 0B
--- Backing Device ---
Device File /dev/sda3 (8:3)
bcache Device File /dev/bcache1 (252:1)
Size 7.00GiB
Cache Mode [writethrough] writeback writearound none
Readahead 0
Sequential Cutoff 4.00MiB
Merge sequential? True
State clean
Writeback? True
Dirty Data 0B
Total Hits 122 (100%)
Total Misses 0
Total Bypass Hits 0
Total Bypass Misses 0
Total Bypassed 0B
--- Cache Device ---
Device File /dev/sdb1 (8:17)
Size 1.00GiB
Block Size 0.00KiB
Bucket Size 512.00KiB
Replacement Policy [lru] fifo random
Discard? False
I/O Errors 0
Metadata Written 1.00KiB
Data Written 0B
Buckets 4094
Cache Used 20.00MiB (1%)
Cache Unused 1.00GiB (99%)
--- bcache ---
UUID d07cd9a1-6211-4bba-bc37-a8ba8858ef4d
Block Size 0.00KiB
Bucket Size 512.00KiB
Congested? False
Read Congestion 2.0ms
Write Congestion 20.0ms
Total Cache Size 1.00GiB
Total Cache Used 204.00MiB (10%)
Total Cache Unused 1.00GiB (90%)
Dirty Data 0B (0%)
Evictable Cache 1.00GiB (100%)
Replacement Policy [lru] fifo random
Cache Mode writethrough [writeback] writearound none
Total Hits 1365 (81%)
Total Misses 318
Total Bypass Hits 3191 (100%)
Total Bypass Misses 0
Total Bypassed 46.00MiB
--- Backing Device ---
Device File /dev/sdc1 (8:33)
bcache Device File /dev/bcache0 (252:0)
Size 19.00GiB
Cache Mode writethrough [writeback] writearound none
Readahead 0
Sequential Cutoff 0B
Merge sequential? True
State dirty
Writeback? True
Dirty Data -6.00MiB
Total Hits 1365 (81%)
Total Misses 318
Total Bypass Hits 3191 (100%)
Total Bypass Misses 0
Total Bypassed 46.00MiB
--- Cache Device ---
Device File /dev/sdd1 (8:49)
Size 1.00GiB
Block Size 0.00KiB
Bucket Size 512.00KiB
Replacement Policy [lru] fifo random
Discard? False
I/O Errors 0
Metadata Written 281.00KiB
Data Written 18.00MiB
Buckets 4094
Cache Used 204.00MiB (10%)
Cache Unused 1.00GiB (90%)
[root@localhost bcache]#
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