HAMMER dedup memory use reduction

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--- a/docs/developer/Code_Bounties.mdwn
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@@ -156,3 +156,24 @@ Unknown.
 ***
  TOTAL AMOUNT         50 eur + 150 usd.
 
+
+## HAMMER dedup memory use reduction
+### Description
+
+HAMMER dedup may end up taking a fair amount of memory; there are straightforward approaches to either reduce the load by running multiple passes or even running in constant space.
+
+### Technical details 
+
+See http://leaf.dragonflybsd.org/mailarchive/users/2011-07/msg00049.html for more details.
+
+### Main goals 
+HAMMER dedup should optionally run in either a multipass mode or in a constant space mode.
+
+### Estimated time 
+Short
+
+### Donators
+*** **vsrinivas** ***: 25 usd.
+
+ TOTAL AMOUNT         25 usd.
+