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CachingFileMgr.h File Reference
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struct  File_Namespace::DiskCacheConfig
class  File_Namespace::TableFileMgr
class  File_Namespace::CachingFileBuffer
class  File_Namespace::CachingFileMgr
 A FileMgr capable of limiting it's size and storing data from multiple tables in a shared directory. For any table that supports DiskCaching, the CachingFileMgr must contain either metadata for all table chunks, or for none (the cache is either has no knowledge of that table, or has complete knowledge of that table). Any data chunk within a table may or may not be contained within the cache. More...




enum  File_Namespace::DiskCacheLevel { File_Namespace::DiskCacheLevel::none, File_Namespace::DiskCacheLevel::fsi, File_Namespace::DiskCacheLevel::non_fsi, File_Namespace::DiskCacheLevel::all }


std::string File_Namespace::get_dir_name_for_table (int db_id, int tb_id)

Detailed Description

This file details an extension of the FileMgr that can contain pages from multiple tables (CachingFileMgr). The main differences between a CFM and an FM:

  • CFM can contain pages from multiple different tables in the same file.
  • CFM will only retain a single version of each page (no support for rolloff or rollback functionality).
  • CFM maintains a separate epoch for each table in it's files.

Definition in file CachingFileMgr.h.