Author: stefan2
Date: Sat Apr 7 11:14:13 2012
New Revision: 1310734
URL: http://svn.apache.org/viewvc?rev=1310734&view=rev
Log:
* notes/knobs
(SVN_FS_FS_MAX_LINEAR_DELTIFICATION, SVN_FS_FS_MAX_DELTIFICATION_WALK):
aling entries with their current usage in FSFS.
Modified:
subversion/trunk/notes/knobs
Modified: subversion/trunk/notes/knobs
URL:
http://svn.apache.org/viewvc/subversion/trunk/notes/knobs?rev=1310734&r1=1310733&r2=1310734&view=diff
==============================================================================
--- subversion/trunk/notes/knobs (original)
+++ subversion/trunk/notes/knobs Sat Apr 7 11:14:13 2012
@@ -134,20 +134,23 @@ SVN_I_LIKE_LATENCY_SO_IGNORE_HTTPV2
3.6 SVN_FS_FS_MAX_LINEAR_DELTIFICATION
Scope: libsvn_fs_fs
- Purpose: max length + 1 of the linear deltification history
- before skip-deltification kicks in
+ Purpose: Controls the space efficiency vs. reconstruction costs tradeoff
+ of rep deltification. Defines the max length of the linear
+ deltification history before skip-deltification kicks in.
+ Values < 2 result in skip-delta-only behavior.
Default: 16
- Range: natural integers
- Suggested: 2, 4, 8, 16, 32, 64
+ Range: natural integers; should be a power of 2
+ Suggested: 1, 4, 8, 16, 32, 64
3.7 SVN_FS_FS_MAX_DELTIFICATION_WALK
Scope: libsvn_fs_fs
- Purpose: max skip deltification range. Change histories
- longer than that will be restarted with a fulltext.
+ Purpose: Limits the skip deltification range to provide commit runtime
+ guarantees. Change histories longer than that will be restarted
+ with a fulltext. Values < 1 disable deltification.
Default: 1023
- Range: natural integers
- Suggested: 1, 2, 3, 4, 5, 7, 11
+ Range: natural integers; should be a power of 2 minus one
+ Suggested: 0, 63, 1023, 4095, 16383
3.8 SVN_UNALIGNED_ACCESS_IS_OK
