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
Inherited Members
Namespace: Lucene.Net.Store
Assembly: Lucene.Net.dll
Syntax
public sealed class RateLimitedDirectoryWrapper : FilterDirectory

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
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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
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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

See Also