Adding Sip n Slurp migration strategy

Author: Oxyjun

src/content/docs/r2/data-migration/index.mdx

@@ -54,3 +54,10 @@ Quickly and easily migrate data from other cloud providers to R2. Explore each o
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+## Migration strategies
+
+You can use a combination of Super Slurper and Sippy to effectively migrate all objects without any downtime.
+
+1. Activate Sippy to gradually copy objects from the previous bucket to an R2 bucket when they are requested (on-demand).
+2. Use Super Slurper to trigger a one-off migration to copy the remaining objects into the R2 bucket.