ckdb - begin aging code, startup stats, handle idle

src/ckdb.c

@@ -93,14 +93,22 @@ ASSERT2(sizeof(int64_t) == 8);
 			(_res) == PGRES_TUPLES_OK || \
 			(_res) == PGRES_EMPTY_QUERY)
 
+static char *pqerrmsg(PGconn *conn)
+{
+	char *ptr, *buf = strdup(PQerrorMessage(conn));
+
+	ptr = buf + strlen(buf) - 1;
+	while (ptr >= buf && (*ptr == '\n' || *ptr == '\r'))
+		*(ptr--) = '\0';
+	while (--ptr >= buf) {
+		if (*ptr == '\n' || *ptr == '\r' || *ptr == '\t')
+			*ptr = ' ';
+	}
+	return buf;
+}
+
 #define PGLOG(__LOG, __str, __rescode, __conn) do { \
-		char *__ptr, *__buf = strdup(PQerrorMessage(__conn)); \
+		char *__buf = pqerrmsg(__conn); \
-		__ptr = __buf + strlen(__buf) - 1; \
-		while (__ptr >= __buf && (*__ptr == '\n' || *__ptr == '\r')) \
-			*(__ptr--) = '\0'; \
-		while (--__ptr >= __buf) \
-			if (*__ptr == '\n' || *__ptr == '\r' || *__ptr == '\t') \
-				*__ptr = ' '; \
 		__LOG("%s(): %s failed (%d) '%s'", __func__, \
 			__str, (int)rescode, __buf); \
 		free(__buf); \
@@ -469,6 +477,11 @@ static const tv_t date_eot = { DATE_S_EOT, DATE_uS_EOT };
 		} \
 	} while (0)
 
+// Tell the summarizer data load is complete
+static bool summarizer_go = false;
+// Tell the summarizer to die
+static bool summarizer_die = false;
+
 static const char *userpatt = "^[!-~]*$"; // no spaces
 static const char *mailpatt = "^[A-Za-z0-9_-][A-Za-z0-9_\\.-]*@[A-Za-z0-9][A-Za-z0-9\\.]*[A-Za-z0-9]$";
 static const char *idpatt = "^[_A-Za-z][_A-Za-z0-9]*$";
@@ -478,7 +491,7 @@ static const char *hashpatt = "^[A-Fa-f0-9]*$";
 #define JSON_TRANSFER "json="
 #define JSON_TRANSFER_LEN (sizeof(JSON_TRANSFER)-1)
 
-// Methods for sharelog (common function for all 3)
+// Methods for sharelog (common function for all)
 #define STR_WORKINFO "workinfo"
 #define STR_SHARES "shares"
 #define STR_SHAREERRORS "shareerror"
@@ -779,6 +792,7 @@ typedef struct sharesummary {
 	int64_t errorcount;
 	int64_t countlastupdate; // non-DB field
 	bool inserted; // non-DB field
+	bool saveaged; // non-DB field
 	tv_t firstshare;
 	tv_t lastshare;
 	char complete[TXT_FLAG+1];
@@ -912,7 +926,6 @@ static K_STORE *poolstats_store;
 
 // USERSTATS userstats.id.json={...}
 // Pool sends each user (staggered) once per 10m
-// TODO: When to discard?
 typedef struct userstats {
 	char poolinstance[TXT_BIG+1];
 	int64_t userid;
@@ -922,15 +935,17 @@ typedef struct userstats {
 	double hashrate5m;
 	double hashrate1hr;
 	double hashrate24hr;
+	bool idle; // Non-db field
+	char summarylevel[TXT_FLAG+1]; // Initially '0' in the DB
 	SIMPLEDATECONTROLFIELDS;
 } USERSTATS;
 
-/* USERSATS protocol includes a boolean 'eos' that when true,
+/* USERSTATS protocol includes a boolean 'eos' that when true,
  * we have received the full set of data for the given
  * createdate batch, and thus can move all (complete) records
- * matching the createdate in userstats_eos_store into the tree */
+ * matching the createdate from userstats_eos_store into the tree */
 
-#define ALLOC_USERSTATS 1000
+#define ALLOC_USERSTATS 10000
 #define LIMIT_USERSTATS 0
 #define DATA_USERSTATS(_item) ((USERSTATS *)(_item->data))
 
@@ -944,11 +959,79 @@ static K_STORE *userstats_eos_store;
  * This is used when grouping the sub-worker stats into a single user
  * We add each worker's latest stats to the total - except we ignore
  * any worker with newest stats being older than USERSTATS_PER_S */
-#define USERSTATS_PER_S (int)(600 * 1.5)
+#define USERSTATS_PER_S 900
 
-/* on the allusers page, show any with stats in the last 1hr */
+/* on the allusers page, show any with stats in the last ... */
 #define ALLUSERS_LIMIT_S 3600
 
+/* Userstats get stored in the DB for each time band of this
+ * amount from midnight (UTC+00)
+ * Thus we simply put each stats value in the time band of the
+ * stat's timestamp
+ * Userstats are sumarised in the the same userstats table
+ * If USERSTATS_DB_S is close to the expected time per USERSTATS
+ * then it will have higher variance i.e. obviously: a higher
+ * average of stats per sample will mean a lower SD of the number
+ * of stats per sample
+ * The #if below ensures USERSTATS_DB_S times an integer = a day
+ * so the last band is the same size as the rest -
+ * and will graph easily
+ * Obvious WARNING - the smaller this is, the more stats in the DB
+ * This is summary level '1'
+ */
+#define USERSTATS_DB_S 3600
+
+#if (((24*60*60) % USERSTATS_DB_S) != 0)
+#error "USERSTATS_DB_S times an integer must = a day"
+#endif
+
+/* We summarise and discard userstats that are older than the
+ * maximum of USERSTATS_DB_S, USERSTATS_PER_S, ALLUSERS_LIMIT_S
+ */
+#if (USERSTATS_PER_S > ALLUSERS_LIMIT_S)
+ #if (USERSTATS_PER_S > USERSTATS_DB_S)
+  #define USERSTATS_AGE USERSTATS_PER_S
+ #else
+  #define USERSTATS_AGE USERSTATS_DB_S
+ #endif
+#else
+ #if (ALLUSERS_LIMIT_S > USERSTATS_DB_S)
+  #define USERSTATS_AGE ALLUSERS_LIMIT_S
+ #else
+  #define USERSTATS_AGE USERSTATS_DB_S
+ #endif
+#endif
+
+/* summarisation of the userstats after this many days are done
+ * at the day level and the above stats are deleted from the db
+ * Obvious WARNING - the larger this is, the more stats in the DB
+ * This is summary level '2'
+ */
+#define USERSTATS_DB_D 7
+
+#define tv_newer(_old, _new) (((_old)->tv_sec == (_new)->tv_sec) ? \
+				((_old)->tv_usec < (_new)->tv_usec) : \
+				((_old)->tv_sec < (_new)->tv_sec))
+
+// zzz TODO
+// WORKERSTATUS from various incoming data
+typedef struct workerstatus {
+	int64_t userid;
+	char workername[TXT_BIG+1];
+	tv_t auth;
+	tv_t share;
+	tv_t stats;
+	tv_t idle;
+} WORKERSTATUS;
+
+#define ALLOC_WORKERSTATUS 1000
+#define LIMIT_WORKERSTATUS 0
+#define DATA_WORKERSTATUS(_item) ((WORKERSTATUS *)(_item->data))
+
+static K_TREE *workerstatus_root;
+static K_LIST *workerstatus_list;
+static K_STORE *workerstatus_store;
+
 static char logname[512];
 #define LOGFILE(_msg) rotating_log(logname, _msg)
 
@@ -1410,7 +1493,7 @@ static PGconn *dbconnect()
 
 	conn = PQconnectdb(conninfo);
 	if (PQstatus(conn) != CONNECTION_OK)
-		quithere(1, "ERR: Failed to connect to db '%s'", PQerrorMessage(conn));
+		quithere(1, "ERR: Failed to connect to db '%s'", pqerrmsg(conn));
 
 	return conn;
 }
@@ -1491,6 +1574,91 @@ cleanup:
 	return lastid;
 }
 
+// order by userid asc,workername asc
+static double cmp_workerstatus(K_ITEM *a, K_ITEM *b)
+{
+	double c = (double)(DATA_WORKERSTATUS(a)->userid -
+			    DATA_WORKERSTATUS(b)->userid);
+	if (c == 0.0) {
+		c = strcmp(DATA_WORKERSTATUS(a)->workername,
+			   DATA_WORKERSTATUS(b)->workername);
+	}
+	return c;
+}
+
+static K_ITEM *find_workerstatus(int64_t userid, char *workername)
+{
+	WORKERSTATUS workerstatus;
+	K_TREE_CTX ctx[1];
+	K_ITEM look;
+
+	workerstatus.userid = userid;
+	STRNCPY(workerstatus.workername, workername);
+
+	look.data = (void *)(&workerstatus);
+	return find_in_ktree(workerstatus_root, &look, cmp_workerstatus, ctx);
+}
+
+static K_ITEM *_find_create_workerstatus(int64_t userid, char *workername, bool create)
+{
+	K_ITEM *item = NULL;
+	WORKERSTATUS *row;
+
+	item = find_workerstatus(userid, workername);
+	if (!item && create) {
+		K_WLOCK(workerstatus_list);
+		item = k_unlink_head(workerstatus_list);
+
+		row = DATA_WORKERSTATUS(item);
+
+		bzero(row, sizeof(*row));
+		row->userid = userid;
+		STRNCPY(row->workername, workername);
+
+		workerstatus_root = add_to_ktree(workerstatus_root, item, cmp_workerstatus);
+		k_add_head(workerstatus_store, item);
+		K_WUNLOCK(workerstatus_list);
+	}
+	return item;
+}
+
+#define find_create_workerstatus(_u, _w)  _find_create_workerstatus(_u, _w, true)
+#define find_workerstatus(_u, _w)  _find_create_workerstatus(_u, _w, false)
+
+static void workerstatus_update(AUTHS *auths, SHARES *shares, USERSTATS *userstats)
+{
+	WORKERSTATUS *row;
+	K_ITEM *item;
+
+	LOGDEBUG("%s()", __func__);
+
+	if (auths) {
+		item = find_create_workerstatus(auths->userid, auths->workername);
+		row = DATA_WORKERSTATUS(item);
+		if (tv_newer(&(row->auth), &(auths->createdate)))
+			memcpy(&(row->auth), &(auths->createdate), sizeof(row->auth));
+	}
+
+	if (shares) {
+		item = find_create_workerstatus(shares->userid, shares->workername);
+		row = DATA_WORKERSTATUS(item);
+		if (tv_newer(&(row->share), &(shares->createdate)))
+			memcpy(&(row->share), &(shares->createdate), sizeof(row->share));
+	}
+
+	if (userstats) {
+		item = find_create_workerstatus(userstats->userid, userstats->workername);
+		row = DATA_WORKERSTATUS(item);
+		if (userstats->idle) {
+			if (tv_newer(&(row->idle), &(userstats->createdate)))
+				memcpy(&(row->idle), &(userstats->createdate), sizeof(row->idle));
+		} else {
+			if (tv_newer(&(row->stats), &(userstats->createdate)))
+				memcpy(&(row->stats), &(userstats->createdate), sizeof(row->idle));
+		}
+	}
+}
+
 // default tree order by username asc,expirydate desc
 static double cmp_users(K_ITEM *a, K_ITEM *b)
 {
@@ -1716,10 +1884,12 @@ static bool users_fill(PGconn *conn)
 	K_WUNLOCK(users_list);
 	PQclear(res);
 
-	if (ok)
+	if (ok) {
 		LOGDEBUG("%s(): built", __func__);
+		LOGWARNING("%s(): loaded %d users records", __func__, n);
+	}
 
-	return true;
+	return ok;
 }
 
 void users_reload()
@@ -2140,10 +2310,12 @@ static bool workers_fill(PGconn *conn)
 	K_WUNLOCK(workers_list);
 	PQclear(res);
 
-	if (ok)
+	if (ok) {
 		LOGDEBUG("%s(): built", __func__);
+		LOGWARNING("%s(): loaded %d workers records", __func__, n);
+	}
 
-	return true;
+	return ok;
 }
 
 void workers_reload()
@@ -2281,10 +2453,12 @@ static bool payments_fill(PGconn *conn)
 	K_WUNLOCK(payments_list);
 	PQclear(res);
 
-	if (ok)
+	if (ok) {
 		LOGDEBUG("%s(): built", __func__);
+		LOGWARNING("%s(): loaded %d payments records", __func__, n);
+	}
 
-	return true;
+	return ok;
 }
 
 void payments_reload()
@@ -2669,10 +2843,12 @@ static bool workinfo_fill(PGconn *conn)
 	K_WUNLOCK(workinfo_list);
 	PQclear(res);
 
-	if (ok)
+	if (ok) {
 		LOGDEBUG("%s(): built", __func__);
+		LOGWARNING("%s(): loaded %d workinfo records", __func__, n);
+	}
 
-	return true;
+	return ok;
 }
 
 void workinfo_reload()
@@ -2766,6 +2942,8 @@ static bool shares_add(char *workinfoid, char *username, char *workername, char
 	if (!w_item)
 		goto unitem;
 
+	workerstatus_update(NULL, shares, NULL);
+
 	sharesummary_update(NULL, shares, NULL, NULL, now, by, code, inet);
 
 	ok = true;
@@ -3015,6 +3193,7 @@ static bool sharesummary_update(PGconn *conn, SHARES *s_row, SHAREERRORS *e_row,
 			row->sharehi = row->sharerej = 0.0;
 			row->sharecount = row->errorcount = row->countlastupdate = 0;
 			row->inserted = false;
+			row->saveaged = false;
 			row->firstshare.tv_sec = sharecreatedate->tv_sec;
 			row->firstshare.tv_usec = sharecreatedate->tv_usec;
 			row->lastshare.tv_sec = row->firstshare.tv_sec;
@@ -3131,6 +3310,8 @@ static bool sharesummary_update(PGconn *conn, SHARES *s_row, SHAREERRORS *e_row,
 
 		row->countlastupdate = row->sharecount + row->errorcount;
 		row->inserted = true;
+		if (row->complete[0] == SUMMARY_AGED)
+			row->saveaged = true;
 	} else {
 		bool stats_update = false;
 
@@ -3178,6 +3359,8 @@ static bool sharesummary_update(PGconn *conn, SHARES *s_row, SHAREERRORS *e_row,
 				goto unparam;
 			}
 			row->countlastupdate = row->sharecount + row->errorcount;
+			if (row->complete[0] == SUMMARY_AGED)
+				row->saveaged = true;
 		} else {
 			if (!must_update) {
 				ok = true;
@@ -3202,6 +3385,8 @@ static bool sharesummary_update(PGconn *conn, SHARES *s_row, SHAREERRORS *e_row,
 					goto unparam;
 				}
 				row->countlastupdate = row->sharecount + row->errorcount;
+				if (row->complete[0] == SUMMARY_AGED)
+					row->saveaged = true;
 			}
 		}
 	}
@@ -3382,10 +3567,12 @@ static bool sharesummary_fill(PGconn *conn)
 	K_WUNLOCK(sharesummary_list);
 	PQclear(res);
 
-	if (ok)
+	if (ok) {
 		LOGDEBUG("%s(): built", __func__);
+		LOGWARNING("%s(): loaded %d sharesummary records", __func__, n);
+	}
 
-	return true;
+	return ok;
 }
 
 void sharesummary_reload()
@@ -3698,10 +3885,12 @@ static bool blocks_fill(PGconn *conn)
 	K_WUNLOCK(blocks_list);
 	PQclear(res);
 
-	if (ok)
+	if (ok) {
 		LOGDEBUG("%s(): built", __func__);
+		LOGWARNING("%s(): loaded %d blocks records", __func__, n);
+	}
 
-	return true;
+	return ok;
 }
 
 void blocks_reload()
@@ -3778,6 +3967,9 @@ static char *auths_add(PGconn *conn, char *poolinstance, char *username,
 	HISTORYDATEINIT(row, now, by, code, inet);
 	HISTORYDATETRANSFER(row);
 
+	// Update even if DB fails
+	workerstatus_update(row, NULL, NULL);
+
 	row->authid = nextid(conn, "authid", (int64_t)1, now, by, code, inet);
 	if (row->authid == 0)
 		goto unitem;
@@ -3914,10 +4106,12 @@ static bool auths_fill(PGconn *conn)
 	K_WUNLOCK(auths_list);
 	PQclear(res);
 
-	if (ok)
+	if (ok) {
 		LOGDEBUG("%s(): built", __func__);
+		LOGWARNING("%s(): loaded %d auth records", __func__, n);
+	}
 
-	return true;
+	return ok;
 }
 
 void auths_reload()
@@ -4115,10 +4309,12 @@ static bool poolstats_fill(PGconn *conn)
 	K_WUNLOCK(poolstats_list);
 	PQclear(res);
 
-	if (ok)
+	if (ok) {
 		LOGDEBUG("%s(): built", __func__);
+		LOGWARNING("%s(): loaded %d poolstats records", __func__, n);
+	}
 
-	return true;
+	return ok;
 }
 
 void poolstats_reload()
@@ -4195,8 +4391,8 @@ static double cmp_userstats_workername(K_ITEM *a, K_ITEM *b)
 
 static bool userstats_add(char *poolinstance, char *elapsed, char *username,
 			  char *workername, char *hashrate, char *hashrate5m,
-			  char *hashrate1hr, char *hashrate24hr, bool eos,
+			  char *hashrate1hr, char *hashrate24hr, bool idle,
-			  tv_t *now, char *by, char *code, char *inet)
+			  bool eos, tv_t *now, char *by, char *code, char *inet)
 {
 	K_ITEM *us_item, *u_item, *us_match, *us_next;
 	USERSTATS *row;
@@ -4221,6 +4417,7 @@ static bool userstats_add(char *poolinstance, char *elapsed, char *username,
 	TXT_TO_DOUBLE("hashrate5m", hashrate5m, row->hashrate5m);
 	TXT_TO_DOUBLE("hashrate1hr", hashrate1hr, row->hashrate1hr);
 	TXT_TO_DOUBLE("hashrate24hr", hashrate24hr, row->hashrate24hr);
+	row->idle = idle;
 	SIMPLEDATEINIT(row, now, by, code, inet);
 	SIMPLEDATETRANSFER(row);
 
@@ -4230,6 +4427,8 @@ static bool userstats_add(char *poolinstance, char *elapsed, char *username,
 		createdate.tv_usec = row->createdate.tv_usec;
 	}
 
+	workerstatus_update(NULL, NULL, row);
+
 	/* group at full key: userid,createdate,poolinstance,workername
 	   i.e. ignore instance and group together down at workername */
 	us_match = userstats_eos_store->head;
@@ -4353,29 +4552,39 @@ static bool check_db_version(PGconn *conn)
 	}
 
 	PQclear(res);
+
+	LOGWARNING("%s(): DB version (%s) correct", __func__, DB_VERSION);
+
 	return true;
 }
 
 static bool getdata()
 {
 	PGconn *conn = dbconnect();
+	bool ok = true;
+
+	if (!(ok = check_db_version(conn)))
+		goto matane;
+	if (!(ok = users_fill(conn)))
+		goto matane;
+	if (!(ok = workers_fill(conn)))
+		goto matane;
+	if (!(ok = payments_fill(conn)))
+		goto matane;
+	if (!(ok = workinfo_fill(conn)))
+		goto matane;
+	if (!(ok = shares_fill()))
+		goto matane;
+	if (!(ok = shareerrors_fill()))
+		goto matane;
+	if (!(ok = auths_fill(conn)))
+		goto matane;
+	ok = poolstats_fill(conn);
+
+matane:
 
-	if (!check_db_version(conn)) {
 	PQfinish(conn);
-		return false;
+	return ok;
-	}
-
-	users_fill(conn);
-	workers_fill(conn);
-	payments_fill(conn);
-	workinfo_fill(conn);
-	shares_fill();
-	shareerrors_fill();
-	auths_fill(conn);
-	poolstats_fill(conn);
-
-	PQfinish(conn);
-	return true;
 }
 
 /* TODO:
@@ -4532,6 +4741,10 @@ static bool setup_data()
 	userstats_root = new_ktree();
 	userstats_list->dsp_func = dsp_userstats;
 
+	workerstatus_list = k_new_list("WorkerStatus", sizeof(WORKERSTATUS), ALLOC_WORKERSTATUS, LIMIT_WORKERSTATUS, true);
+	workerstatus_store = k_new_store(workerstatus_list);
+	workerstatus_root = new_ktree();
+
 	if (!getdata())
 		return false;
 
@@ -4727,8 +4940,8 @@ static char *cmd_userstats(char *cmd, __maybe_unused char *id, tv_t *now, char *
 
 	K_ITEM *i_poolinstance, *i_elapsed, *i_username, *i_workername;
 	K_ITEM *i_hashrate, *i_hashrate5m, *i_hashrate1hr, *i_hashrate24hr;
-	K_ITEM *i_eos;
+	K_ITEM *i_eos, *i_idle;
-	bool ok = false, eos;
+	bool ok = false, idle, eos;
 
 	LOGDEBUG("%s(): cmd '%s'", __func__, cmd);
 
@@ -4764,6 +4977,12 @@ static char *cmd_userstats(char *cmd, __maybe_unused char *id, tv_t *now, char *
 	if (!i_hashrate24hr)
 		return strdup(reply);
 
+	i_idle = require_name("idle", 1, NULL, reply, siz);
+	if (!i_idle)
+		return strdup(reply);
+
+	idle = (strcasecmp(DATA_TRANSFER(i_idle)->data, TRUE_STR) == 0);
+
 	i_eos = require_name("eos", 1, NULL, reply, siz);
 	if (!i_eos)
 		return strdup(reply);
@@ -4778,7 +4997,7 @@ static char *cmd_userstats(char *cmd, __maybe_unused char *id, tv_t *now, char *
 			   DATA_TRANSFER(i_hashrate5m)->data,
 			   DATA_TRANSFER(i_hashrate1hr)->data,
 			   DATA_TRANSFER(i_hashrate24hr)->data,
-			   eos, now, by, code, inet);
+			   idle, eos, now, by, code, inet);
 
 	if (!ok) {
 		LOGERR("%s.failed.DATA", id);
@@ -4920,7 +5139,7 @@ static char *cmd_payments(char *cmd, char *id, __maybe_unused tv_t *now, __maybe
 static char *cmd_workers(char *cmd, char *id, __maybe_unused tv_t *now, __maybe_unused char *by,
 				__maybe_unused char *code, __maybe_unused char *inet)
 {
-	K_ITEM *i_username, *i_stats, wlook, *u_item, *w_item, uslook, *us_item;
+	K_ITEM *i_username, *i_stats, wlook, *u_item, *w_item, uslook, *us_item, *ws_item;
 	K_TREE_CTX w_ctx[1], us_ctx[1];
 	WORKERS workers;
 	USERSTATS userstats;
@@ -4982,9 +5201,14 @@ static char *cmd_workers(char *cmd, char *id, __maybe_unused tv_t *now, __maybe_
 				int64_t w_elapsed;
 				tv_t w_lastshare;
 
-				w_lastshare.tv_sec = 0;
 				w_hashrate5m = w_hashrate1hr = 0.0;
 				w_elapsed = -1;
+				w_lastshare.tv_sec = 0;
+
+				ws_item = find_workerstatus(DATA_USERS(u_item)->userid,
+							    DATA_WORKERS(w_item)->workername);
+				if (ws_item)
+					w_lastshare.tv_sec = DATA_WORKERSTATUS(ws_item)->share.tv_sec;
 
 				// find last stored userid record
 				userstats.userid = DATA_USERS(u_item)->userid;
@@ -4997,10 +5221,6 @@ static char *cmd_workers(char *cmd, char *id, __maybe_unused tv_t *now, __maybe_
 				us_item = find_before_in_ktree(userstats_root, &uslook, cmp_userstats, us_ctx);
 				while (us_item && DATA_USERSTATS(us_item)->userid == userstats.userid) {
 					if (strcmp(DATA_USERSTATS(us_item)->workername, DATA_WORKERS(w_item)->workername) == 0) {
-						// first found is the newest share
-						if (w_lastshare.tv_sec == 0)
-							w_lastshare.tv_sec = DATA_USERSTATS(us_item)->createdate.tv_sec;
-
 						if (tvdiff(now, &(DATA_USERSTATS(us_item)->createdate)) < USERSTATS_PER_S) {
 							// TODO: add together the latest per pool instance (this is the latest per worker)
 							if (!find_in_ktree(userstats_workername_root, us_item, cmp_userstats_workername, usw_ctx)) {
@@ -5935,6 +6155,36 @@ static enum cmd_values breakdown(char *buf, int *which_cmds, char *cmd, char *id
 	return cmds[*which_cmds].cmd_val;
 }
 
+static void summarise_poolstats()
+{
+// TODO
+}
+
+static void summarise_userstats()
+{
+// TODO
+}
+
+static void *summariser(__maybe_unused void *arg)
+{
+	pthread_detach(pthread_self());
+
+	while (!summarizer_die && !summarizer_go)
+		cksleep_ms(42);
+
+	while (!summarizer_die) {
+		sleep(19);
+
+		if (!summarizer_die)
+			summarise_poolstats();
+
+		if (!summarizer_die)
+			summarise_userstats();
+	}
+
+	return NULL;
+}
+
 // TODO: equivalent of api_allow
 static void *listener(void *arg)
 {
@@ -5944,10 +6194,13 @@ static void *listener(void *arg)
 	char cmd[CMD_SIZ+1], id[ID_SIZ+1], reply[1024+1];
 	enum cmd_values cmdnum;
 	int sockd, which_cmds;
+	pthread_t summzer;
 	K_ITEM *item;
 	size_t siz;
 	tv_t now;
 
+	create_pthread(&summzer, summariser, NULL);
+
 	rename_proc(pi->sockname);
 
 	if (!setup_data()) {
@@ -5955,6 +6208,10 @@ static void *listener(void *arg)
 		return NULL;
 	}
 
+	LOGWARNING("%s(): ckdb ready", __func__);
+
+	summarizer_go = true;
+
 	while (true) {
 		dealloc(buf);
 		sockd = accept(us->sockd, NULL, NULL);
@@ -6044,6 +6301,7 @@ int main(int argc, char **argv)
 	ckpool_t ckp;
 	int c, ret;
 	char *kill;
+	tv_t now;
 
 	feenableexcept(FE_DIVBYZERO | FE_INVALID | FE_OVERFLOW);
 
@@ -6144,7 +6402,8 @@ int main(int argc, char **argv)
 	write_namepid(&ckp.main);
 	create_process_unixsock(&ckp.main);
 
-	srand((unsigned int)time(NULL));
+	setnow(&now);
+	srand((unsigned int)(now.tv_usec * 4096 + now.tv_sec % 4096));
 	create_pthread(&ckp.pth_listener, listener, &ckp.main);
 
 	handler.sa_flags = 0;