Revision: 14810
Author: adrian.chadd
Date: Wed Oct 20 19:01:35 2010
Log: Fix for Issue #120 - make external_acl queue depth configurable
http://code.google.com/p/lusca-cache/source/detail?r=14810
Modified:
/branches/LUSCA_HEAD/src/cf.data.pre
/branches/LUSCA_HEAD/src/external_acl.c
/branches/LUSCA_HEAD/src/structs.h
=======================================
--- /branches/LUSCA_HEAD/src/cf.data.pre Mon Aug 9 20:30:38 2010
+++ /branches/LUSCA_HEAD/src/cf.data.pre Wed Oct 20 19:01:35 2010
@@ -395,6 +395,20 @@
-----------------------------------------------------------------------------
COMMENT_END
+NAME: external_acl_maxqueue
+TYPE: int
+LOC: Config.externalAclMaxQueue
+DEFAULT: 0
+DOC_START
+ By default, the maximum queue depth for the external ACL helpers
+ is the number of helper processes. This may not be useful in larger
+ installations where multiple requests are queued to the helpers
+ before the helper can receive and service requests.
+
+ By changing it to a non-zero value, the maximum queue depth will
+ be fixed to this value, regardless of the number of helper processes.
+DOC_END
+
NAME: external_acl_type
TYPE: externalAclHelper
LOC: Config.externalAclHelperList
=======================================
--- /branches/LUSCA_HEAD/src/external_acl.c Mon Sep 13 08:58:44 2010
+++ /branches/LUSCA_HEAD/src/external_acl.c Wed Oct 20 19:01:35 2010
@@ -498,6 +498,8 @@
static inline int
externalAclOverload(external_acl * def)
{
+ if (Config.externalAclMaxQueue > 0)
+ return def->helper->stats.queue_size > Config.externalAclMaxQueue;
return def->helper->stats.queue_size > def->helper->n_running;
}
=======================================
--- /branches/LUSCA_HEAD/src/structs.h Mon Aug 9 18:58:36 2010
+++ /branches/LUSCA_HEAD/src/structs.h Wed Oct 20 19:01:35 2010
@@ -792,6 +792,7 @@
char *store_dir_select_algorithm;
int sleep_after_fork; /* microseconds */
time_t minimum_expiry_time; /* seconds */
+ int externalAclMaxQueue;
external_acl *externalAclHelperList;
enum zph_mode {
ZPH_OFF = 0,
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