org.eclipse.jgit.internal.storage.dfs

Class DfsBlockCacheConfig

java.lang.Object

org.eclipse.jgit.internal.storage.dfs.DfsBlockCacheConfig

public class DfsBlockCacheConfig
extends Object

Configuration parameters for DfsBlockCache.

Field Summary

Fields

Modifier and Type	Field and Description
static int	KB 1024 (number of bytes in one kibibyte/kilobyte)
static int	MB 1024 KB (number of bytes in one mebibyte/megabyte)

Constructor Summary

Constructors

Constructor and Description
DfsBlockCacheConfig() Create a default configuration.

Method Summary

Modifier and Type	Method and Description
DfsBlockCacheConfig	fromConfig(Config rc) Update properties by setting fields from the configuration.
long	getBlockLimit()
int	getBlockSize()
int	getConcurrencyLevel()
double	getStreamRatio()
DfsBlockCacheConfig	setBlockLimit(long newLimit)
DfsBlockCacheConfig	setBlockSize(int newSize)
DfsBlockCacheConfig	setConcurrencyLevel(int newConcurrencyLevel)
DfsBlockCacheConfig	setStreamRatio(double ratio)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

KB

public static final int KB

1024 (number of bytes in one kibibyte/kilobyte)

See Also:

Constant Field Values

MB

public static final int MB

1024 KB (number of bytes in one mebibyte/megabyte)

See Also:

Constant Field Values

Constructor Detail

DfsBlockCacheConfig

public DfsBlockCacheConfig()

Create a default configuration.

Method Detail

getBlockLimit

public long getBlockLimit()

Returns:

maximum number bytes of heap memory to dedicate to caching pack file data. Default is 32 MB.

setBlockLimit

public DfsBlockCacheConfig setBlockLimit(long newLimit)

Parameters:

newLimit - maximum number bytes of heap memory to dedicate to caching pack file data.

Returns:

this

getBlockSize

public int getBlockSize()

Returns:

size in bytes of a single window mapped or read in from the pack file. Default is 64 KB.

setBlockSize

public DfsBlockCacheConfig setBlockSize(int newSize)

Parameters:

newSize - size in bytes of a single window read in from the pack file. The value must be a power of 2.

Returns:

this

getConcurrencyLevel

public int getConcurrencyLevel()

Returns:

the estimated number of threads concurrently accessing the cache. Default is 32.

setConcurrencyLevel

public DfsBlockCacheConfig setConcurrencyLevel(int newConcurrencyLevel)

Parameters:

newConcurrencyLevel - the estimated number of threads concurrently accessing the cache.

Returns:

this

getStreamRatio

public double getStreamRatio()

Returns:

highest percentage of getBlockLimit() a single pack can occupy while being copied by the pack reuse strategy. Default is 0.30, or 30%.

setStreamRatio

public DfsBlockCacheConfig setStreamRatio(double ratio)

Parameters:

ratio - percentage of cache to occupy with a copied pack.

Returns:

this

fromConfig

public DfsBlockCacheConfig fromConfig(Config rc)

Update properties by setting fields from the configuration.

If a property is not defined in the configuration, then it is left unmodified.

Parameters:

rc - configuration to read properties from.

Returns:

this