c++ - leveldb DeleteObsoleteFiles is private -

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does knows why deleteobsoletefiles member function private in leveldb ? there situations when need free diskspace , 1 of ways try delete leveldb obsolete files. can make public , call safely ?

files become 'obsolute' after compaction:

deleteobsoletefiles() called @ end of every compaction , @ end of recovery. finds names of files in database. deletes log files not current log file. deletes table files not referenced level , not output of active compaction.

if want reduce disc space occupied can run compaction

  // compact underlying storage key range [*begin,*end].   // in particular, deleted , overwritten versions discarded,   // , data rearranged reduce cost of operations   // needed access data.  operation should typically   // invoked users understand underlying implementation.   //   // begin==null treated key before keys in database.   // end==null treated key after keys in database.   // therefore following call compact entire database:   //    db->compactrange(null, null);   virtual void compactrange(const slice* begin, const slice* end)

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