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CyberShadow / btdu

sampling disk usage profiler for btrfs
GNU General Public License v2.0
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Strange/wrong size reported after a lot of samples #1

Closed broetchenrackete36 closed 3 years ago

broetchenrackete36 commented 3 years ago

I have a raid5 array with more than 16TB data on it. At first, btdu shows numbers that look really good but if I let it run quite long (a few hours or so), the reported size is wrong completely (sometimes only a few GB).

btdu v0.2.0 @ /btrfs                                                              
--- / -----------------------------------------------------------------------------
  ~167.1 GiB [          ] /<RAID1>                                                  
  ~33.3 GiB [##########] /<RAID5>                                                 

--- Details: ----------------------------------------------------------------------
- Full path: /btrfs/                                                               
- Size: ~200.5 GiB (46054422 samples)                                              
- Average query duration: 10 ms, 723 μs, and 4 hnsecs                              

--- Explanation:                                                                   
Welcome to btdu. You are in the hierarchy root; results will be arranged according 
to their block group and profile, and then by path.                                

Use the arrow keys to navigate, press ? for help.                                  

Samples: 46054422  Resolution: ~403.8 KiB
CyberShadow commented 3 years ago

Wow, a 64-bit integer overflow.

CyberShadow commented 3 years ago

Released v0.2.1. Thanks for the report :)