IndexFile Class Reference

RTree-based index file. More...

#include <IndexFile.h>

Inheritance diagram for IndexFile:

Public Member Functions
	IndexFile (int RTreeM=50)
	Constructor.
	~IndexFile ()
	Destructor.
virtual void	open (const stdString &filename, ReadWrite readwrite=ReadOnly)
	Open the index file.
virtual void	close ()
	Close the index file.
virtual Result *	addChannel (const stdString &channel)
	Add channel.
virtual Result *	findChannel (const stdString &channel)
	Find channel.
virtual NameIterator *	iterator ()
	Returns iterator.
void	showStats (FILE *f)
	Prints statistics.
bool	check (int level)
	Check level.
Public Member Functions inherited from Index
	Index ()
	Constructor.
virtual	~Index ()
	Destructor.
const std::string &	getFilename ()
	Get the basename. More...
const std::string &	getDirectory ()
	Get the directory. More...
const stdString &	getFullName ()

Static Public Attributes
static const uint32_t	cookie = 0x43414932
	== 'CAI2', Chan. More...
static const uint32_t	ht_size
	The hash table size used for new channel name tables. More...

Additional Inherited Members
Public Types inherited from Index
enum	ReadWrite { ReadOnly, ReadAndWrite }
	Modes used for open.

Detailed Description

RTree-based index file.

The IndexFile combines the NameHash for channel name lookup with one RTree per channel into an index.

The file itself starts with the IndexFile cookie, followed by the NameHash anchor. Those two items constitute the 'reserved space' all the remaining space is handled by the FileAllocator. The ID of each NameHash entry points to an RTree anchor.

For a 'full' index, the RTree data blocks point to the actual data file and offset of the referenced data. For a 'shallow' index, the RTree points to further index files, offset 0. This distinction is made outside of the IndexFile class by the ArchiveIndexTool that builds the indices respectivly the DataReader classes that read data.

Member Data Documentation

const uint32_t IndexFile::cookie = 0x43414932

static

== 'CAI2', Chan.

Arch. Index 2

const uint32_t IndexFile::ht_size

static

The hash table size used for new channel name tables.

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The documentation for this class was generated from the following file:

• /home/malitsky/projects/epics-archiver/sourceforge/trunk/ea4-cpp/include/common/storage/IndexFile.h