From 83ee4d3ebf739f8aad67cf8faea093fc71d24d01 Mon Sep 17 00:00:00 2001
From: Tom Clegg <tclegg@veritasgenetics.com>
Date: Mon, 22 Jul 2019 13:05:35 -0400
Subject: [PATCH] 14287: Comment multi-dimensional map.

Arvados-DCO-1.1-Signed-off-by: Tom Clegg <tclegg@veritasgenetics.com>
---
 lib/controller/federation/list.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/controller/federation/list.go b/lib/controller/federation/list.go
index 43ed2cdbaa..124946de0e 100644
--- a/lib/controller/federation/list.go
+++ b/lib/controller/federation/list.go
@@ -140,6 +140,11 @@ func (conn *Conn) splitListRequest(ctx context.Context, opts arvados.ListOptions
 		}
 	}
 
+	// Collate UUIDs in matchAllFilters by remote cluster ID --
+	// e.g., todoByRemote["aaaaa"]["aaaaa-4zz18-000000000000000"]
+	// will be true -- and count the total number of UUIDs we're
+	// filtering on, so we can compare it to our max page size
+	// limit.
 	nUUIDs := 0
 	todoByRemote := map[string]map[string]bool{}
 	for uuid := range matchAllFilters {
-- 
2.30.2