query: use proper labelset for fan-out pruning in distributed engine #8511
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To facilitate proper fan-out pruning in the distributed engine, we need to annotate the remote engines with their proper external labelset. Previously we only would use their partition labels but that leads to unnecessary global fan-outs, but newer versions of promql-engine can distinguish between partition labels and the full labelset. Signed-off-by: Michael Hoffmann <[email protected]>
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To facilitate proper fan-out pruning in the distributed engine, we need to annotate the remote engines with their proper external labelset. Previously we only would use their partition labels but that leads to unnecessary global fan-outs, but newer versions of promql-engine can distinguish between partition labels and the full labelset.
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