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Kaperstone / mogilefs

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over-replication issue with ZoneLocal #45

Open GoogleCodeExporter opened 8 years ago

GoogleCodeExporter commented 8 years ago 
In setup with two data centers, when I'm using ZoneLocal plugin and 
MogileFS::Network there is issue with over-replication in situation's when 
tracker (replicate) try to connect to storage node and timeouts while that. 
After that we see to_happy files :)

If any additional info is needed I will attach them.

Original issue reported on code.google.com by planck...@gmail.com on 3 Nov 2011 at 9:22

GoogleCodeExporter commented 8 years ago 
Example output from mogstats:

Statistics for replication...
  domain               class        devcount      files
  -------------------- ----------- ---------- ----------
  dm                   somecl               4   ~60000000
  dm                   somecl               5       2209
  dm                   somecl               6       4697
  dm                   somecl               7       7247
  dm                   somecl               8       7458
  dm                   somecl               9       6230
  dm                   somecl              10       4989
  dm                   somecl              11       4231
  dm                   somecl              12       4147
  dm                   somecl              13       4085
  dm                   somecl              14       3968
  dm                   somecl              15       3852
  dm                   somecl              16       3891
  dm                   somecl              17       5174
  dm                   somecl              18         13 
  dm                   somecl              19         21 
  dm                   somecl              20         10 
  dm                   somecl              21          4  
  dm                   somecl              22          5  
  dm                   somecl              23          2  
  dm                   somecl              24          7  
  dm                   somecl              25          5  
  dm                   somecl              27          1  
  dm                   somecl              28          2

Generaly devcount should be equal 4. (two copies per data center)

Original comment by planck...@gmail.com on 3 Nov 2011 at 9:42