Class RateLimitedDirectoryWrapper

A Directory wrapper that allows IndexOutput rate limiting using IO context (IOContext.UsageContext) specific rate limiters (RateLimiter).

This is a Lucene.NET EXPERIMENTAL API, use at your own risk
Inheritance
System.Object
Directory
FilterDirectory
RateLimitedDirectoryWrapper
Implements
System.IDisposable
Inherited Members
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
Namespace: Lucene.Net.Store
Assembly: Lucene.Net.dll
Syntax
public sealed class RateLimitedDirectoryWrapper : FilterDirectory, IDisposable

Constructors

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RateLimitedDirectoryWrapper(Directory)

Declaration
public RateLimitedDirectoryWrapper(Directory wrapped)
Parameters
Type Name Description
Directory wrapped

Methods

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Copy(Directory, String, String, IOContext)

Declaration
public override void Copy(Directory to, string src, string dest, IOContext context)
Parameters
Type Name Description
Directory to
System.String src
System.String dest
IOContext context
Overrides
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CreateOutput(String, IOContext)

Declaration
public override IndexOutput CreateOutput(string name, IOContext context)
Parameters
Type Name Description
System.String name
IOContext context
Returns
Type Description
IndexOutput
Overrides
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CreateSlicer(String, IOContext)

Declaration
public override Directory.IndexInputSlicer CreateSlicer(string name, IOContext context)
Parameters
Type Name Description
System.String name
IOContext context
Returns
Type Description
Directory.IndexInputSlicer
Overrides
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GetMaxWriteMBPerSec(IOContext.UsageContext)

See SetMaxWriteMBPerSec(Nullable<Double>, IOContext.UsageContext).

This is a Lucene.NET EXPERIMENTAL API, use at your own risk
Declaration
public double GetMaxWriteMBPerSec(IOContext.UsageContext context)
Parameters
Type Name Description
IOContext.UsageContext context
Returns
Type Description
System.Double
Exceptions
Type Condition
System.ObjectDisposedException

if the Directory is already disposed
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SetMaxWriteMBPerSec(Nullable<Double>, IOContext.UsageContext)

Sets the maximum (approx) MB/sec allowed by all write IO performed by IndexOutput created with the given IOContext.UsageContext. Pass null for mbPerSec to have no limit.

NOTE: For already created IndexOutput instances there is no guarantee this new rate will apply to them; it will only be guaranteed to apply for new created IndexOutput instances.

NOTE: this is an optional operation and might not be respected by all Directory implementations. Currently only buffered (FSDirectory) Directory implementations use rate-limiting.

This is a Lucene.NET EXPERIMENTAL API, use at your own risk
Declaration
public void SetMaxWriteMBPerSec(double? mbPerSec, IOContext.UsageContext context)
Parameters
Type Name Description
System.Nullable<System.Double> mbPerSec
IOContext.UsageContext context
Exceptions
Type Condition
System.ObjectDisposedException

if the Directory is already disposed
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SetRateLimiter(RateLimiter, IOContext.UsageContext)

Sets the rate limiter to be used to limit (approx) MB/sec allowed by all IO performed with the given context (IOContext.UsageContext). Pass null to have no limit.

Passing an instance of rate limiter compared to setting it using SetMaxWriteMBPerSec(Nullable<Double>, IOContext.UsageContext) allows to use the same limiter instance across several directories globally limiting IO across them.

This is a Lucene.NET EXPERIMENTAL API, use at your own risk
Declaration
public void SetRateLimiter(RateLimiter mergeWriteRateLimiter, IOContext.UsageContext context)
Parameters
Type Name Description
RateLimiter mergeWriteRateLimiter
IOContext.UsageContext context
Exceptions
Type Condition
System.ObjectDisposedException

if the Directory is already disposed

Implements

System.IDisposable

See Also