DiskIOStrategy Class Reference

#include <DiskIOStrategy.h>

Inheritance diagram for DiskIOStrategy:

Public Member Functions
virtual	~DiskIOStrategy ()
virtual bool	shedLoad ()=0
virtual int	load ()=0
virtual RefCount< DiskFile >	newFile (char const *path)=0
virtual void	sync ()
virtual bool	unlinkdUseful () const =0
virtual void	unlinkFile (char const *)=0
virtual int	callback ()
virtual void	init ()
virtual void	statfs (StoreEntry &) const
virtual ConfigOption *	getOptionTree () const

Detailed Description

Definition at line 19 of file DiskIOStrategy.h.

Constructor & Destructor Documentation

~DiskIOStrategy()

virtual DiskIOStrategy::~DiskIOStrategy ( )

inlinevirtual

Definition at line 23 of file DiskIOStrategy.h.

Member Function Documentation

callback()

virtual int DiskIOStrategy::callback ( )

inlinevirtual

perform any pending callbacks

Reimplemented in DiskdIOStrategy, SingletonIOStrategy, and DiskThreadsIOStrategy.

Definition at line 44 of file DiskIOStrategy.h.

Referenced by SingletonIOStrategy::callback().

getOptionTree()

virtual ConfigOption * DiskIOStrategy::getOptionTree ( ) const

inlinevirtual

module specific options

Reimplemented in DiskdIOStrategy, and SingletonIOStrategy.

Definition at line 53 of file DiskIOStrategy.h.

Referenced by SingletonIOStrategy::getOptionTree().

init()

virtual void DiskIOStrategy::init ( void  )

inlinevirtual

Init per-instance logic

Reimplemented in DiskdIOStrategy, SingletonIOStrategy, and DiskThreadsIOStrategy.

Definition at line 47 of file DiskIOStrategy.h.

Referenced by SingletonIOStrategy::init().

load()

virtual int DiskIOStrategy::load ( )

pure virtual

What is the current load? 999 = 99.9%

Implemented in BlockingIOStrategy, DiskdIOStrategy, SingletonIOStrategy, DiskThreadsIOStrategy, IpcIoIOStrategy, and MmappedIOStrategy.

Referenced by SingletonIOStrategy::load().

newFile()

virtual RefCount< DiskFile > DiskIOStrategy::newFile ( char const *  path )

pure virtual

Return a handle for performing IO operations

Implemented in BlockingIOStrategy, DiskdIOStrategy, SingletonIOStrategy, DiskThreadsIOStrategy, IpcIoIOStrategy, and MmappedIOStrategy.

Referenced by SingletonIOStrategy::newFile().

shedLoad()

virtual bool DiskIOStrategy::shedLoad ( )

pure virtual

Can the IO Strategy handle more requests ?

Implemented in BlockingIOStrategy, DiskdIOStrategy, SingletonIOStrategy, DiskThreadsIOStrategy, IpcIoIOStrategy, and MmappedIOStrategy.

Referenced by Fs::Ufs::UFSStrategy::shedLoad(), and SingletonIOStrategy::shedLoad().

statfs()

virtual void DiskIOStrategy::statfs ( StoreEntry &  ) const

inlinevirtual

cachemgr output on the IO instance stats

Reimplemented in DiskdIOStrategy, and SingletonIOStrategy.

Definition at line 50 of file DiskIOStrategy.h.

Referenced by SingletonIOStrategy::statfs().

sync()

virtual void DiskIOStrategy::sync ( )

inlinevirtual

flush all IO operations

Reimplemented in DiskdIOStrategy, SingletonIOStrategy, and DiskThreadsIOStrategy.

Definition at line 35 of file DiskIOStrategy.h.

Referenced by SingletonIOStrategy::sync().

unlinkdUseful()

virtual bool DiskIOStrategy::unlinkdUseful ( ) const

pure virtual

whether the IO Strategy can use unlinkd

Implemented in BlockingIOStrategy, DiskdIOStrategy, SingletonIOStrategy, DiskThreadsIOStrategy, IpcIoIOStrategy, and MmappedIOStrategy.

Referenced by SingletonIOStrategy::unlinkdUseful().

unlinkFile()

virtual void DiskIOStrategy::unlinkFile ( char const *  )

pure virtual

unlink a file by path

Implemented in BlockingIOStrategy, DiskdIOStrategy, DiskThreadsIOStrategy, IpcIoIOStrategy, MmappedIOStrategy, and SingletonIOStrategy.

Referenced by SingletonIOStrategy::unlinkFile().

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

• src/DiskIO/DiskIOStrategy.h