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Full Discussion: Stream Read And Write Queues
Top Forums UNIX for Advanced & Expert Users Stream Read And Write Queues Post 21794 by S.P.Prasad on Thursday 23rd of May 2002 12:23:25 AM
Old 05-23-2002
Following is the diagram I found in SCO manuals :-
(upstream) (downstream)
(up^stream) (downstr|eam)
(up|stream) (downstr|eam)
(up|stream) (downstrXeam)
READ QUEUE«.........»WRITE QUEUE
(up^stream) (downstr|eam)
(up|stream) (downstr|eam)
(up|stream) (downstrXeam)
READ QUEUE«...........»WRITE QUEUE
(upstream) (downstream)

The above figure shows queue's linkage with neighboring modules with links ( solid vertical arrows - --> or --X ) in both directions.
I can very well understand the flow of message from downstream to upstream direction. But according to the manual each queue locates it mates ( see dotted line ) .
My question is I am not able to understand why such a relation is required or else I am completely wrong ?

Thanks in advance.

Last edited by S.P.Prasad; 05-23-2002 at 01:37 AM..
 

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Data::Stream::Bulk::Chunked(3pm)			User Contributed Perl Documentation			  Data::Stream::Bulk::Chunked(3pm)

NAME
Data::Stream::Bulk::Chunked - combine streams into larger chunks VERSION
version 0.11 SYNOPSIS
use Data::Stream::Bulk::Chunked; Data::Stream::Bulk::Chunked->new( stream => $s, chunk_size => 10000, ); DESCRIPTION
This is a stream which wraps an existing stream to give more items in a single block. This can simplify application code which does its own processing one block at a time, and where processing larger blocks is more efficient. ATTRIBUTES
stream The stream to chunk. Required. chunk_size The minimum number of items to return in a block. Defaults to 1 (which does nothing). METHODS
get_more See Data::Stream::Bulk::DoneFlag. Returns at least "chunk_size" items. Note that this isn't guaranteed to return exactly "chunk_size" items - it just returns multiple full blocks from the backend. Also, the final block returned may have less than "chunk_size" items. AUTHOR
Yuval Kogman <nothingmuch@woobling.org> COPYRIGHT AND LICENSE
This software is copyright (c) 2012 by Yuval Kogman. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. perl v5.14.2 2012-02-14 Data::Stream::Bulk::Chunked(3pm)
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