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src/osd/Ager.h

 

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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- 

 

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// vim: ts=8 sw=2 smarttab

 

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#ifndef CEPH_AGER_H

 

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#define CEPH_AGER_H

 

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#include "include/types.h"

 

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#include "include/Distribution.h"

 

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#include "os/ObjectStore.h"

 

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#include "common/Clock.h"

 

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#include <list>

 

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#include <vector>

 

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using namespace std;

 

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class Ager {

 

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  ObjectStore *store;

 

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 private:

 

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  list<file_object_t>           age_free_oids;

 

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  file_object_t                 age_cur_oid;

 

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  vector< list<file_object_t> > age_objects;

 

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  Distribution file_size_distn; //kb

 

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  bool         did_distn;

 

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  void age_empty(float pc);

 

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  uint64_t age_fill(float pc, utime_t until);

 

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  ssize_t age_pick_size();

 

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  file_object_t age_get_oid();

 

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 public:

 

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  Ager(ObjectStore *s) : store(s), did_distn(false) {} 

 

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  void age(int time,

 

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           float high_water,    // fill to this %

 

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          float low_water,     // then empty to this %

 

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          int count,         // this many times

 

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          float final_water,   // and end here ( <= low_water)

 

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          int fake_size_mb=0);

 

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  void save_freelist(int);

 

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  void load_freelist();

 

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};

 

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#endif

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