CachingFileMgr.h File Reference

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: More...

#include <optional>
#include <ostream>
#include "DataMgr/ForeignStorage/CacheEvictionAlgorithms/LRUEvictionAlgorithm.h"
#include "FileMgr.h"
#include "Shared/File.h"
#include "Shared/SysDefinitions.h"

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Classes
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...

Namespaces
	File_Namespace

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

Functions
std::ostream &	File_Namespace::operator<< (std::ostream &os, DiskCacheLevel disk_cache_level)
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.