In a large saucepan, heat the cranberries, brown sugar, and 2 cups of water over medium-high heat to boiling. Simmer, stirring occasionally, until the cranberries start to pop and release juices, about 10 minutes.
Add the pears, jalapeño, raisins, and lime juice and simmer for another 5 minutes.
Remove from heat. Cool. Cover and refrigerate up to 2 days ahead.