Answer / prakash balakrishnan

It is the condition, where the graph will stop processing
due to mutual dependency of data.

For Ex:

Let’s consider a concatenate component, having three
inputs. Let’s say first i/p receives 20 million records,
second i/p receives 1000 records, third i/p receives 500
records.
Now even though the concatenate receives i/p’s at second
and third i/p port, the concatenate won’t work until it
receives all the i/p’s at it’s first i/p port. So the
graph’ll stop processing until the first i/p port receives
all its data. This condition is called DEADLOCK.

This is now minimised (not prevented) by “Automated flow
buffering”. This will in turn provide more workspace in
network resource allocation. So that the processing’ll be
faster.

The Automated flow buffering is available from 1.8 version.

Answer / gita

Deadlock occurs when a program cannot progress, causing a
graph to hang. The likelihood of deadlock occurring depends
on the patterns of data flows. A graph carries a potential
for deadlock when flows diverge and converge within a single
phase. If the flows converge at a component that reads its
input flows in a particular order, that component may wait
for records to arrive on one flow even as the unread data
accumulates on others, because components have a limited
buffering capacity. Before GDE version 1.8, deadlock was a
common problem. It is now a rare occurrence due to the
automatic flow buffering feature added in version 1.8.

Answer / prakash

when two or more components using the same resource, then u
will get dead lock

Answer / quesanswer

Hi kanaga
M asking for abinitio grpahs
when does deadlock occur

Answer / babu

If two or more components are waiting for the same resource apart from using some other resource then deadlock occurs

Answer / kanaga

IF TWO ARE MORE THREADS WAITING TO RELEASE A RESOURCE,WHEN
DEADLOCK IS OCCUR.

11. What is the use of allocate()?

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I wanted to learn Ab Initio, Could you please send the material to my personal email id.

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