IBM SMF Explorer
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  1. IBM SMF Explorer Documentation
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  3. Mapping and Samples
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  5. SMF Type 74
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  7. SMF 74 Subtype 5
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  9. Field - r7451gsf

Field - r7451gsf

Global Mirror Collisions (GMC) sidefile count (short float). A GMC occurs when, during the sending of data in the secondary to create a consistency group, a subsequent host update is attempted before the modified track has been transmitted to the secondary volume. The modified track will be moved to the sidefile before allowing a new host write. The counter will be incremented by one when a track is added to the sidefile.

Description

Global Mirror Collisions (GMC) sidefile count (short float). A GMC occurs when, during the sending of data in the secondary to create a consistency group, a subsequent host update is attempted before the modified track has been transmitted to the secondary volume. The modified track will be moved to the sidefile before allowing a new host write. The counter will be incremented by one when a track is added to the sidefile.