Commit 7c2b0f65 authored by Cao jin's avatar Cao jin Committed by Juan Quintela
Browse files

docs/xbzrle: correction 



1. Default cache size is 64MB.
2. Semantics correction.

Signed-off-by: default avatarCao jin <caoj.fnst@cn.fujitsu.com>
Reviewed-by: default avatarJuan Quintela <quintela@redhat.com>
Signed-off-by: default avatarJuan Quintela <quintela@redhat.com>
parent 2ff30257

docs/xbzrle.txt

+2 −2
Original line number Diff line number Diff line
@@ -42,7 +42,7 @@ nzrun = length byte... 
length = uleb128 encoded integer



On the sender side XBZRLE is used as a compact delta encoding of page updates,

retrieving the old page content from the cache (default size of 512 MB). The

retrieving the old page content from the cache (default size of 64MB). The

receiving side uses the existing page's content and XBZRLE to decode the new

page's content.
@@ -73,7 +73,7 @@ e9 07 0f 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f 03 01 67 01 01 69 


Cache update strategy

=====================

Keeping the hot pages in the cache is effective for decreased cache

Keeping the hot pages in the cache is effective for decreasing cache

misses. XBZRLE uses a counter as the age of each page. The counter will

increase after each ram dirty bitmap sync. When a cache conflict is

detected, XBZRLE will only evict pages in the cache that are older than