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diff -up bind-9.8.2rc1/bin/named/include/named/lwresd.h.lwres_tasks_clients bind-9.8.2rc1/bin/named/include/named/lwresd.h
--- bind-9.8.2rc1/bin/named/include/named/lwresd.h.lwres_tasks_clients 2007-06-20 01:46:59.000000000 +0200
+++ bind-9.8.2rc1/bin/named/include/named/lwresd.h 2014-05-19 09:41:56.792427201 +0200
@@ -36,6 +36,8 @@ struct ns_lwresd {
dns_view_t *view;
ns_lwsearchlist_t *search;
unsigned int ndots;
+ unsigned int ntasks;
+ unsigned int nclients;
isc_mem_t *mctx;
isc_boolean_t shutting_down;
unsigned int refs;
diff -up bind-9.8.2rc1/bin/named/lwresd.c.lwres_tasks_clients bind-9.8.2rc1/bin/named/lwresd.c
--- bind-9.8.2rc1/bin/named/lwresd.c.lwres_tasks_clients 2009-09-03 01:48:01.000000000 +0200
+++ bind-9.8.2rc1/bin/named/lwresd.c 2014-05-19 09:41:56.793427201 +0200
@@ -60,11 +60,7 @@
#define LWRESLISTENER_MAGIC ISC_MAGIC('L', 'W', 'R', 'L')
#define VALID_LWRESLISTENER(l) ISC_MAGIC_VALID(l, LWRESLISTENER_MAGIC)
-/*!
- * The total number of clients we can handle will be NTASKS * NRECVS.
- */
-#define NTASKS 2 /*%< tasks to create to handle lwres queries */
-#define NRECVS 2 /*%< max clients per task */
+#define LWRESD_NCLIENTS_MAX 32768 /*%< max clients per task */
typedef ISC_LIST(ns_lwreslistener_t) ns_lwreslistenerlist_t;
@@ -395,6 +391,24 @@ ns_lwdmanager_create(isc_mem_t *mctx, co
}
}
+ obj = NULL;
+ (void)cfg_map_get(lwres, "lwres-tasks", &obj);
+ if (obj != NULL)
+ lwresd->ntasks = cfg_obj_asuint32(obj);
+ else
+ lwresd->ntasks = ns_g_cpus;
+
+ obj = NULL;
+ (void)cfg_map_get(lwres, "lwres-clients", &obj);
+ if (obj != NULL) {
+ lwresd->nclients = cfg_obj_asuint32(obj);
+ if (lwresd->nclients > LWRESD_NCLIENTS_MAX)
+ lwresd->nclients = LWRESD_NCLIENTS_MAX;
+ } else if (ns_g_lwresdonly)
+ lwresd->nclients = 1024;
+ else
+ lwresd->nclients = 256;
+
lwresd->magic = LWRESD_MAGIC;
*lwresdp = lwresd;
@@ -604,15 +618,24 @@ static isc_result_t
listener_startclients(ns_lwreslistener_t *listener) {
ns_lwdclientmgr_t *cm;
unsigned int i;
- isc_result_t result;
+ isc_result_t result = ISC_R_SUCCESS;
+
+ isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
+ NS_LOGMODULE_LWRESD, ISC_LOG_DEBUG(6),
+ "listener_startclients: creating %d "
+ "managers with %d clients each",
+ listener->manager->ntasks, listener->manager->nclients);
/*
* Create the client managers.
*/
- result = ISC_R_SUCCESS;
- for (i = 0; i < NTASKS && result == ISC_R_SUCCESS; i++)
- result = ns_lwdclientmgr_create(listener, NRECVS,
+ for (i = 0; i < listener->manager->ntasks; i++) {
+ result = ns_lwdclientmgr_create(listener,
+ listener->manager->nclients,
ns_g_taskmgr);
+ if (result != ISC_R_SUCCESS)
+ break;
+ }
/*
* Ensure that we have created at least one.
diff -up bind-9.8.2rc1/bin/named/named.conf.docbook.lwres_tasks_clients bind-9.8.2rc1/bin/named/named.conf.docbook
--- bind-9.8.2rc1/bin/named/named.conf.docbook.lwres_tasks_clients 2011-11-07 01:31:47.000000000 +0100
+++ bind-9.8.2rc1/bin/named/named.conf.docbook 2014-05-19 09:41:56.793427201 +0200
@@ -185,6 +185,8 @@ lwres {
view <replaceable>string</replaceable> <replaceable>optional_class</replaceable>;
search { <replaceable>string</replaceable>; ... };
ndots <replaceable>integer</replaceable>;
+ lwres-tasks <replaceable>integer</replaceable>;
+ lwres-clients <replaceable>integer</replaceable>;
};
</literallayout>
</refsect1>
diff -up bind-9.8.2rc1/doc/arm/Bv9ARM-book.xml.lwres_tasks_clients bind-9.8.2rc1/doc/arm/Bv9ARM-book.xml
--- bind-9.8.2rc1/doc/arm/Bv9ARM-book.xml.lwres_tasks_clients 2014-05-19 09:41:56.770427201 +0200
+++ bind-9.8.2rc1/doc/arm/Bv9ARM-book.xml 2014-05-19 10:26:40.147380836 +0200
@@ -2964,7 +2964,12 @@ $ORIGIN 0.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.
be configured to act as a lightweight resolver daemon using the
<command>lwres</command> statement in <filename>named.conf</filename>.
</para>
-
+ <para>
+ The number of client queries that the <command>lwresd</command>
+ daemon is able to serve can be set using the
+ <option>lwres-tasks</option> and <option>lwres-clients</option>
+ statements in the configuration.
+ </para>
</sect1>
</chapter>
@@ -4959,6 +4964,8 @@ badresp:1,adberr:0,findfail:0,valfail:0]
<optional> view <replaceable>view_name</replaceable>; </optional>
<optional> search { <replaceable>domain_name</replaceable> ; <optional> <replaceable>domain_name</replaceable> ; ... </optional> }; </optional>
<optional> ndots <replaceable>number</replaceable>; </optional>
+ <optional> lwres-tasks <replaceable>number</replaceable>; </optional>
+ <optional> lwres-clients <replaceable>number</replaceable>; </optional>
};
</programlisting>
@@ -5017,6 +5024,31 @@ badresp:1,adberr:0,findfail:0,valfail:0]
number of dots in a relative domain name that should result in an
exact match lookup before search path elements are appended.
</para>
+ <para>
+ The <option>lwres-tasks</option> statement specifies the number
+ of worker threads the lightweight resolver will dedicate to serving
+ clients. By default the number is the same as the number of CPUs on
+ the system; this can be overridden using the <option>-n</option>
+ command line option when starting the server.
+ </para>
+ <para>
+ The <option>lwres-clients</option> specifies
+ the number of client objects per thread the lightweight
+ resolver should create to serve client queries.
+ By default, if the lightweight resolver runs as a part
+ of <command>named</command>, 256 client objects are
+ created for each task; if it runs as <command>lwresd</command>,
+ 1024 client objects are created for each thread. The maximum
+ value is 32768; higher values will be silently ignored and
+ the maximum will be used instead.
+ Note that setting too high a value may overconsume
+ system resources.
+ </para>
+ <para>
+ The maximum number of client queries that the lightweight
+ resolver can handle at any one time equals
+ <option>lwres-tasks</option> times <option>lwres-clients</option>.
+ </para>
</sect2>
<sect2>
<title><command>masters</command> Statement Grammar</title>
diff -up bind-9.8.2rc1/lib/isccfg/namedconf.c.lwres_tasks_clients bind-9.8.2rc1/lib/isccfg/namedconf.c
--- bind-9.8.2rc1/lib/isccfg/namedconf.c.lwres_tasks_clients 2014-05-19 09:41:56.771427201 +0200
+++ bind-9.8.2rc1/lib/isccfg/namedconf.c 2014-05-19 09:41:56.797427201 +0200
@@ -2563,6 +2563,8 @@ lwres_clauses[] = {
{ "view", &cfg_type_lwres_view, 0 },
{ "search", &cfg_type_lwres_searchlist, 0 },
{ "ndots", &cfg_type_uint32, 0 },
+ { "lwres-tasks", &cfg_type_uint32, 0},
+ { "lwres-clients", &cfg_type_uint32, 0},
{ NULL, NULL, 0 }
};