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This video summarizes the processing of physical and virtual pairing. It also reviews the performance issues and recommendations for physical and virtual pairing.
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This video describes how you can improve the performance when executing DLET calls with virtual pairing.
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This video describes the processing that occurs with a DLET call in bidirectional virtual pairing.
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This video describes the processing that occurs with a DLET call in bidirectional physical pairing.
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This video describes the processing that IMS must perform to execute a Dl/I GHx calls followed by a REPL call for a logical child segment when bidirectional virtual…
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This video describes replace calls for a logical child segments with physical pairing that result in the paired segments in both logically related databases being…
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This video describes a get next parent call accessing a virtual logical child in a bidirectional virtual pairing relationship, which is much more complex from a…
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This video describes a get next parent call accessing a real logical child, which is not conceptually complex. Although we are illustrating accessing a logical child…
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This video describes the processing that must be performed when inserting a new LINEITEM virtual logical child segment with a LPCK of PROD2MOD2 into a database when…
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This video describes the processing that must be performed when inserting a new LINEITEM real logical child segment with a LPCK of PROD2MOD2 into a database when…
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This video provides a summary that matches functional and performance requirements with the recommended pointer implementations of symbolic pointers, direct pointers, or…
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Storing both symbolic and direct pointers in the logical child is almost always the best choice for performance. This approach eliminates the need for any I/Os in order…
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With direct pointers, the number of I/Os and CPU time required to access any individual logical parent is usually minimized. DL/I can directly access the exact location…
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This video starts the discussion of direct logical parent pointers and what advantages and disadvantages they have.
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This video continues the discussion of logical parent pointers, specifically, that the main advantage for symbolic pointers is that their use permits logical…
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