updating ChangeLog and README.md

twitter · Sep 7, 2012 · 3322624 · 3322624
1 parent aa195da
commit 3322624
Show file tree

Hide file tree

Showing 2 changed files with 6 additions and 4 deletions.
diff --git a/ChangeLog b/ChangeLog
@@ -1,8 +1,9 @@
 2012-09-06  Cache Team <cache-team@twitter.com>
 	* twemcache: version 2.5.1 release
 	* Feature: slab LRC eviction (-M 8), designed for write through cases
-	* Feature: auto klog ratation support, reopen after size reaches 1GB
-			   klog is turned on if a filename is given at start time
+	* Feature: auto klog rotation support, reopen after size reaches 1GB
+	           klog is turned on if a filename is given at start time
+	* Feature: Backporting fixed size (-e) hash feature from memcached 1.4.8
 	* Cleanup: data flags and data length now stored as part of item header
 	* Misc: updated TODO list
 
@@ -12,7 +13,7 @@
 	           multiple eviction strategies can now be stacked
 	* Fix: fix logical error of code and remove meaningless code (monadbobo)
 	* Misc: new notes, updated TODO list
-			add twctop README
+	        add twctop README
 
 2012-07-10  Cache Team <cache-team@twitter.com>
 

diff --git a/README.md b/README.md
@@ -101,7 +101,8 @@ Eviction is triggered when a cache reaches full memory capacity. This happens wh
 * No eviction (0) - don't evict, respond with server error reply.
 * Item LRU eviction (1) - evict only existing items in the same slab class, least recently updated first; essentially a per-slabclass LRU eviction.
 * Random eviction (2) - evict all items from a randomly chosen slab.
-* Slab LRU eviction (4) - choose the least recently updated slab, and evict all items from it to reuse the slab.
+* Slab LRA eviction (4) - choose the least recently accessed slab, and evict all items from it to reuse the slab.
+* Slab LRC eviction (8) - choose the least recently created slab, and evict all items from it to reuse the slab. Eviction ignores freeq & lruq to make sure the eviction follows the timestamp closely. Recommended if cache is updated on the write path.
 
 Eviction strategies can be *stacked*, in the order of higher to lower bit. For example, `-M 5` means that if slab LRU eviciton fails, Twemcache will try item LRU eviction.