Add an index to a SPDO cluster?

[shabbybanks]

In the past I have tried to add an index to a SPDO cluster dataset via

PROC DATASETS ... INDEX CREATE

which results in an error. Is there some other way to add an index to a SPDO cluster dataset? Can one possibly create indices on the member datasets before calling

PROC SPDO ... CLUSTER CREATE

and will these then somehow get aggregated into a master index of some kind? Or is indexing simply not possible on clusters?

[LinusH · Accepted solution]

Indexes must be applied before you are creating the cluster.
All cluster members must have identical indexes.
And no, no master index will be but. During a query, first spds decides which members qualifies. Then, if any where predicates is evaluated to the individual members.
The only master index sort of speak is the minmaxvarlist mechanism which is almost mandatory.