diff --git a/Makefile.am b/Makefile.am
index 0a7b9299..329e98e1 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,2 +1,3 @@
 ACLOCAL_AMFLAGS = -I m4
 SUBDIRS = src
+EXTRA_DIST = ckpool.conf ckproxy.conf
diff --git a/README b/README
index 01f32aa1..3d8c90ea 100644
--- a/README
+++ b/README
@@ -256,3 +256,6 @@ and 3334 in proxy mode.
 maximum.
 
 "logdir" : Which directory to store pool and client logs. Default "logs"
+
+"maxclients" : Optional upper limit on the number of clients ckpool will
+accept before rejecting further clients.
diff --git a/configure.ac b/configure.ac
index 218a2392..65d311c0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -37,7 +37,7 @@ AC_CHECK_HEADERS(endian.h sys/endian.h arpa/inet.h sys/poll.h syslog.h)
 AC_CHECK_HEADERS(alloca.h pthread.h stdio.h math.h signal.h sys/prctl.h)
 AC_CHECK_HEADERS(sys/types.h sys/socket.h sys/stat.h linux/un.h netdb.h)
 AC_CHECK_HEADERS(stdint.h netinet/in.h netinet/tcp.h sys/ioctl.h getopt.h)
-AC_CHECK_HEADERS(libpq-fe.h postgresql/libpq-fe.h grp.h)
+AC_CHECK_HEADERS(sys/epoll.h libpq-fe.h postgresql/libpq-fe.h grp.h)
 
 PTHREAD_LIBS="-lpthread"
 MATH_LIBS="-lm"
diff --git a/src/ckpool.c b/src/ckpool.c
index 8c522d46..e1d1186b 100644
--- a/src/ckpool.c
+++ b/src/ckpool.c
@@ -115,16 +115,16 @@ static void *ckmsg_queue(void *arg)
 		tv_t now;
 		ts_t abs;
 
-		mutex_lock(&ckmsgq->lock);
+		mutex_lock(ckmsgq->lock);
 		tv_time(&now);
 		tv_to_ts(&abs, &now);
 		abs.tv_sec++;
 		if (!ckmsgq->msgs)
-			pthread_cond_timedwait(&ckmsgq->cond, &ckmsgq->lock, &abs);
+			pthread_cond_timedwait(ckmsgq->cond, ckmsgq->lock, &abs);
 		msg = ckmsgq->msgs;
 		if (msg)
 			DL_DELETE(ckmsgq->msgs, msg);
-		mutex_unlock(&ckmsgq->lock);
+		mutex_unlock(ckmsgq->lock);
 
 		if (!msg)
 			continue;
@@ -141,13 +141,39 @@ ckmsgq_t *create_ckmsgq(ckpool_t *ckp, const char *name, const void *func)
 	strncpy(ckmsgq->name, name, 15);
 	ckmsgq->func = func;
 	ckmsgq->ckp = ckp;
-	mutex_init(&ckmsgq->lock);
-	cond_init(&ckmsgq->cond);
+	ckmsgq->lock = ckalloc(sizeof(pthread_mutex_t));
+	ckmsgq->cond = ckalloc(sizeof(pthread_cond_t));
+	mutex_init(ckmsgq->lock);
+	cond_init(ckmsgq->cond);
 	create_pthread(&ckmsgq->pth, ckmsg_queue, ckmsgq);
 
 	return ckmsgq;
 }
 
+ckmsgq_t *create_ckmsgqs(ckpool_t *ckp, const char *name, const void *func, int count)
+{
+	ckmsgq_t *ckmsgq = ckzalloc(sizeof(ckmsgq_t) * count);
+	pthread_mutex_t *lock;
+	pthread_cond_t *cond;
+	int i;
+
+	lock = ckalloc(sizeof(pthread_mutex_t));
+	cond = ckalloc(sizeof(pthread_cond_t));
+	mutex_init(lock);
+	cond_init(cond);
+
+	for (i = 0; i < count; i++) {
+		snprintf(ckmsgq[i].name, 15, "%.8s%x", name, i);
+		ckmsgq[i].func = func;
+		ckmsgq[i].ckp = ckp;
+		ckmsgq[i].lock = lock;
+		ckmsgq[i].cond = cond;
+		create_pthread(&ckmsgq[i].pth, ckmsg_queue, &ckmsgq[i]);
+	}
+
+	return ckmsgq;
+}
+
 /* Generic function for adding messages to a ckmsgq linked list and signal the
  * ckmsgq parsing thread to wake up and process it. */
 void ckmsgq_add(ckmsgq_t *ckmsgq, void *data)
@@ -156,10 +182,10 @@ void ckmsgq_add(ckmsgq_t *ckmsgq, void *data)
 
 	msg->data = data;
 
-	mutex_lock(&ckmsgq->lock);
+	mutex_lock(ckmsgq->lock);
 	DL_APPEND(ckmsgq->msgs, msg);
-	pthread_cond_signal(&ckmsgq->cond);
-	mutex_unlock(&ckmsgq->lock);
+	pthread_cond_signal(ckmsgq->cond);
+	mutex_unlock(ckmsgq->lock);
 }
 
 /* Return whether there are any messages queued in the ckmsgq linked list. */
@@ -167,10 +193,10 @@ bool ckmsgq_empty(ckmsgq_t *ckmsgq)
 {
 	bool ret = true;
 
-	mutex_lock(&ckmsgq->lock);
+	mutex_lock(ckmsgq->lock);
 	if (ckmsgq->msgs)
 		ret = (ckmsgq->msgs->next == ckmsgq->msgs->prev);
-	mutex_unlock(&ckmsgq->lock);
+	mutex_unlock(ckmsgq->lock);
 
 	return ret;
 }
diff --git a/src/ckpool.h b/src/ckpool.h
index 9284165d..d246e97f 100644
--- a/src/ckpool.h
+++ b/src/ckpool.h
@@ -34,8 +34,8 @@ struct ckmsgq {
 	ckpool_t *ckp;
 	char name[16];
 	pthread_t pth;
-	pthread_mutex_t lock;
-	pthread_cond_t cond;
+	pthread_mutex_t *lock;
+	pthread_cond_t *cond;
 	ckmsg_t *msgs;
 	void (*func)(ckpool_t *, void *);
 };
@@ -181,6 +181,7 @@ struct ckpool_instance {
 #endif
 
 ckmsgq_t *create_ckmsgq(ckpool_t *ckp, const char *name, const void *func);
+ckmsgq_t *create_ckmsgqs(ckpool_t *ckp, const char *name, const void *func, int count);
 void ckmsgq_add(ckmsgq_t *ckmsgq, void *data);
 bool ckmsgq_empty(ckmsgq_t *ckmsgq);
 
diff --git a/src/connector.c b/src/connector.c
index 2acaf19c..401f70a4 100644
--- a/src/connector.c
+++ b/src/connector.c
@@ -11,7 +11,7 @@
 
 #include <arpa/inet.h>
 #include <netinet/in.h>
-#include <sys/poll.h>
+#include <sys/epoll.h>
 #include <sys/socket.h>
 #include <string.h>
 #include <unistd.h>
@@ -30,6 +30,8 @@ struct connector_instance {
 	int serverfd;
 	int nfds;
 	bool accept;
+	pthread_t pth_sender;
+	pthread_t pth_receiver;
 };
 
 typedef struct connector_instance conn_instance_t;
@@ -38,9 +40,6 @@ struct client_instance {
 	/* For clients hashtable */
 	UT_hash_handle hh;
 	int64_t id;
-
-	/* For fdclients hashtable */
-	UT_hash_handle fdhh;
 	int fd;
 
 	/* For dead_clients list */
@@ -59,8 +58,6 @@ typedef struct client_instance client_instance_t;
 
 /* For the hashtable of all clients */
 static client_instance_t *clients;
-/* A hashtable of the clients sorted by fd */
-static client_instance_t *fdclients;
 /* Linked list of dead clients no longer in use but may still have references */
 static client_instance_t *dead_clients;
 
@@ -87,10 +84,11 @@ static pthread_cond_t sender_cond;
 
 /* Accepts incoming connections on the server socket and generates client
  * instances */
-static int accept_client(conn_instance_t *ci)
+static int accept_client(conn_instance_t *ci, int epfd)
 {
-	client_instance_t *client, *old_client;
 	ckpool_t *ckp = ci->pi->ckp;
+	client_instance_t *client;
+	struct epoll_event event;
 	int fd, port, no_clients;
 	socklen_t address_len;
 
@@ -98,7 +96,7 @@ static int accept_client(conn_instance_t *ci)
 	no_clients = HASH_COUNT(clients);
 	ck_runlock(&ci->lock);
 
-	if (ckp->maxclients && no_clients >= ckp->maxclients) {
+	if (unlikely(ckp->maxclients && no_clients >= ckp->maxclients)) {
 		LOGWARNING("Server full with %d clients", no_clients);
 		return 0;
 	}
@@ -143,14 +141,21 @@ static int accept_client(conn_instance_t *ci)
 	keep_sockalive(fd);
 	nolinger_socket(fd);
 
-	LOGINFO("Connected new client %d on socket %d from %s:%d", ci->nfds, fd, client->address_name, port);
+	LOGINFO("Connected new client %d on socket %d to %d active clients from %s:%d",
+		ci->nfds, fd, no_clients, client->address_name, port);
 
 	client->fd = fd;
+	event.data.ptr = client;
+	event.events = EPOLLIN;
+	if (unlikely(epoll_ctl(epfd, EPOLL_CTL_ADD, fd, &event) < 0)) {
+		LOGERR("Failed to epoll_ctl add in accept_client");
+		free(client);
+		return 0;
+	}
 
 	ck_wlock(&ci->lock);
 	client->id = client_id++;
 	HASH_ADD_I64(clients, id, client);
-	HASH_REPLACE(fdhh, fdclients, fd, SOI, client, old_client);
 	ci->nfds++;
 	ck_wunlock(&ci->lock);
 
@@ -166,7 +171,6 @@ static int drop_client(conn_instance_t *ci, client_instance_t *client)
 	if (fd != -1) {
 		Close(client->fd);
 		HASH_DEL(clients, client);
-		HASH_DELETE(fdhh, fdclients, client);
 		LL_PREPEND(dead_clients, client);
 	}
 	ck_wunlock(&ci->lock);
@@ -292,86 +296,64 @@ reparse:
 void *receiver(void *arg)
 {
 	conn_instance_t *ci = (conn_instance_t *)arg;
-	client_instance_t *client, *tmp;
-	struct pollfd fds[65536];
-	int ret, nfds, i;
-	bool update;
+	struct epoll_event event;
+	bool maxconn = true;
+	int ret, epfd;
 
 	rename_proc("creceiver");
 
-	/* First fd is reserved for the accepting socket */
-	fds[0].fd = ci->serverfd;
-	fds[0].events = POLLIN;
-	fds[0].revents = 0;
-rebuild_fds:
-	update = false;
-	nfds = 1;
-
-	ck_rlock(&ci->lock);
-	HASH_ITER(fdhh, fdclients, client, tmp) {
-		if (unlikely(client->fd == -1)) {
-			LOGWARNING("Client id %d is still in fdclients hashtable with invalidated fd!",
-				   client->id);
-			continue;
-		}
-		fds[nfds].fd = client->fd;
-		fds[nfds].events = POLLIN;
-		fds[nfds].revents = 0;
-		nfds++;
+	epfd = epoll_create1(EPOLL_CLOEXEC);
+	if (epfd < 0) {
+		LOGEMERG("FATAL: Failed to create epoll in receiver");
+		return NULL;
 	}
-	ck_runlock(&ci->lock);
-
-repoll:
-	while (!ci->accept)
-		cksleep_ms(100);
-
-	ret = poll(fds, nfds, 1000);
-	if (unlikely(ret < 0)) {
-		LOGERR("Failed to poll in receiver");
-		goto out;
+	event.data.fd = ci->serverfd;
+	event.events = EPOLLIN;
+	ret = epoll_ctl(epfd, EPOLL_CTL_ADD, ci->serverfd, &event);
+	if (ret < 0) {
+		LOGEMERG("FATAL: Failed to add epfd %d to epoll_ctl", epfd);
+		return NULL;
 	}
 
-	for (i = 0; i < nfds && ret > 0; i++) {
-		int fd, accepted;
+	while (42) {
+		client_instance_t *client;
 
-		if (!fds[i].revents)
+		while (unlikely(!ci->accept))
+			cksleep_ms(100);
+		ret = epoll_wait(epfd, &event, 1, 1000);
+		if (unlikely(ret == -1)) {
+			LOGEMERG("FATAL: Failed to epoll_wait in receiver");
+			break;
+		}
+		if (unlikely(!ret)) {
+			if (unlikely(maxconn)) {
+				/* When we first start we listen to as many connections as
+				* possible. Once we stop receiving connections we drop the
+				* listen to the minimum to effectively ratelimit how fast we
+				* can receive connections. */
+				LOGDEBUG("Dropping listen backlog to 0");
+				maxconn = false;
+				listen(ci->serverfd, 0);
+			}
 			continue;
-
-		/* Reset for the next poll pass */
-		fds[i].events = POLLIN;
-		fds[i].revents = 0;
-		--ret;
-
-		/* Is this the listening server socket? */
-		if (i == 0) {
-			accepted = accept_client(ci);
-			if (unlikely(accepted < 0))
-				goto out;
-			if (accepted)
-				update = true;
+		}
+		if (event.data.fd == ci->serverfd) {
+			ret = accept_client(ci, epfd);
+			if (unlikely(ret < 0)) {
+				LOGEMERG("FATAL: Failed to accept_client in receiver");
+				break;
+			}
 			continue;
 		}
-
-		client = NULL;
-		fd = fds[i].fd;
-
-		ck_rlock(&ci->lock);
-		HASH_FIND(fdhh, fdclients, &fd, SOI, client);
-		ck_runlock(&ci->lock);
-
-		if (!client) {
-			/* Probably already removed, remove lazily */
-			LOGDEBUG("Failed to find nfd client %d with polled fd %d in hashtable",
-				 i, fd);
-			update = true;
-		} else
-			parse_client_msg(ci, client);
+		client = event.data.ptr;
+		if ((event.events & EPOLLERR) || (event.events & EPOLLHUP)) {
+			/* Client disconnected */
+			LOGDEBUG("Client fd %d HUP in epoll", client->fd);
+			invalidate_client(ci->pi->ckp, ci, client);
+			continue;
+		}
+		parse_client_msg(ci, client);
 	}
-
-	if (update)
-		goto rebuild_fds;
-	goto repoll;
-out:
 	return NULL;
 }
 
@@ -564,6 +546,17 @@ static int connector_loop(proc_instance_t *pi, conn_instance_t *ci)
 	LOGWARNING("%s connector ready", ckp->name);
 
 retry:
+	if (unlikely(!pthread_tryjoin_np(ci->pth_sender, NULL))) {
+		LOGEMERG("Connector sender thread shutdown, exiting");
+		ret = 1;
+		goto out;
+	}
+	if (unlikely(!pthread_tryjoin_np(ci->pth_receiver, NULL))) {
+		LOGEMERG("Connector receiver thread shutdown, exiting");
+		ret = 1;
+		goto out;
+	}
+
 	Close(sockd);
 	sockd = accept(us->sockd, NULL, NULL);
 	if (sockd < 0) {
@@ -675,7 +668,6 @@ out:
 
 int connector(proc_instance_t *pi)
 {
-	pthread_t pth_sender, pth_receiver;
 	char *url = NULL, *port = NULL;
 	ckpool_t *ckp = pi->ckp;
 	int sockd, ret = 0;
@@ -738,7 +730,7 @@ int connector(proc_instance_t *pi)
 	if (tries)
 		LOGWARNING("Connector successfully bound to socket");
 
-	ret = listen(sockd, 10);
+	ret = listen(sockd, SOMAXCONN);
 	if (ret < 0) {
 		LOGERR("Connector failed to listen on socket");
 		Close(sockd);
@@ -752,8 +744,8 @@ int connector(proc_instance_t *pi)
 	ci.nfds = 0;
 	mutex_init(&sender_lock);
 	cond_init(&sender_cond);
-	create_pthread(&pth_sender, sender, &ci);
-	create_pthread(&pth_receiver, receiver, &ci);
+	create_pthread(&ci.pth_sender, sender, &ci);
+	create_pthread(&ci.pth_receiver, receiver, &ci);
 
 	ret = connector_loop(pi, &ci);
 out:
diff --git a/src/libckpool.c b/src/libckpool.c
index bb34d79f..dab6799e 100644
--- a/src/libckpool.c
+++ b/src/libckpool.c
@@ -440,13 +440,14 @@ void block_socket(int fd)
 	fcntl(fd, F_SETFL, flags & ~O_NONBLOCK);
 }
 
-void _Close(int *fd)
+void _close(int *fd, const char *file, const char *func, const int line)
 {
 	if (*fd < 0)
 		return;
 	LOGDEBUG("Closing file handle %d", *fd);
 	if (unlikely(close(*fd)))
-		LOGWARNING("Close of fd %d failed with errno %d:%s", *fd, errno, strerror(errno));
+		LOGWARNING("Close of fd %d failed with errno %d:%s from %s %s:%d",
+			   *fd, errno, strerror(errno), file, func, line);
 	*fd = -1;
 }
 
@@ -969,7 +970,6 @@ int _get_fd(int sockd, const char *file, const char *func, const int line)
 		goto out;
 	}
 out:
-	Close(sockd);
 	cm = (int *)CMSG_DATA(cmptr);
 	newfd = *cm;
 	free(cmptr);
diff --git a/src/libckpool.h b/src/libckpool.h
index 26f6e670..b01967e5 100644
--- a/src/libckpool.h
+++ b/src/libckpool.h
@@ -426,8 +426,9 @@ void keep_sockalive(int fd);
 void nolinger_socket(int fd);
 void noblock_socket(int fd);
 void block_socket(int fd);
-void _Close(int *fd);
-#define Close(FD) _Close(&FD)
+void _close(int *fd, const char *file, const char *func, const int line);
+#define _Close(FD) _close(FD, __FILE__, __func__, __LINE__)
+#define Close(FD) _close(&FD, __FILE__, __func__, __LINE__)
 int bind_socket(char *url, char *port);
 int connect_socket(char *url, char *port);
 int write_socket(int fd, const void *buf, size_t nbyte);
diff --git a/src/stratifier.c b/src/stratifier.c
index 52073773..d9e6c4f1 100644
--- a/src/stratifier.c
+++ b/src/stratifier.c
@@ -71,6 +71,7 @@ struct pool_stats {
 	double dsps60;
 	double dsps360;
 	double dsps1440;
+	double dsps10080;
 };
 
 typedef struct pool_stats pool_stats_t;
@@ -173,6 +174,7 @@ static int64_t blockchange_id;
 static char lasthash[68], lastswaphash[68];
 
 struct json_params {
+	json_t *method;
 	json_t *params;
 	json_t *id_val;
 	int64_t client_id;
@@ -226,6 +228,7 @@ struct user_instance {
 	double dsps5; /* ... 5 minute ... */
 	double dsps60;/* etc */
 	double dsps1440;
+	double dsps10080;
 	tv_t last_share;
 };
 
@@ -268,6 +271,7 @@ struct stratum_instance {
 	double dsps5; /* ... 5 minute ... */
 	double dsps60;/* etc */
 	double dsps1440;
+	double dsps10080;
 	tv_t ldc; /* Last diff change */
 	int ssdc; /* Shares since diff change */
 	tv_t first_share;
@@ -720,24 +724,39 @@ static void send_generator(ckpool_t *ckp, const char *msg, int prio)
 		gen_priority = 0;
 }
 
+struct update_req {
+	pthread_t *pth;
+	ckpool_t *ckp;
+	int prio;
+};
+
+static void broadcast_ping(void);
+
 /* This function assumes it will only receive a valid json gbt base template
  * since checking should have been done earlier, and creates the base template
  * for generating work templates. */
-static void update_base(ckpool_t *ckp, int prio)
+static void *do_update(void *arg)
 {
+	struct update_req *ur = (struct update_req *)arg;
+	ckpool_t *ckp = ur->ckp;
 	bool new_block = false;
+	int prio = ur->prio;
+	bool ret = false;
 	workbase_t *wb;
 	json_t *val;
 	char *buf;
 
+	pthread_detach(pthread_self());
+	rename_proc("updater");
+
 	buf = send_recv_generator(ckp, "getbase", prio);
 	if (unlikely(!buf)) {
 		LOGWARNING("Failed to get base from generator in update_base");
-		return;
+		goto out;
 	}
 	if (unlikely(cmdmatch(buf, "failed"))) {
 		LOGWARNING("Generator returned failure in update_base");
-		return;
+		goto out;
 	}
 
 	wb = ckzalloc(sizeof(workbase_t));
@@ -782,6 +801,29 @@ static void update_base(ckpool_t *ckp, int prio)
 	add_base(ckp, wb, &new_block);
 
 	stratum_broadcast_update(new_block);
+	ret = true;
+	LOGINFO("Broadcast updated stratum base");
+out:
+	/* Send a ping to miners if we fail to get a base to keep them
+	 * connected while bitcoind recovers(?) */
+	if (!ret) {
+		LOGWARNING("Broadcast ping due to failed stratum base update");
+		broadcast_ping();
+	}
+	free(ur->pth);
+	free(ur);
+	return NULL;
+}
+
+static void update_base(ckpool_t *ckp, int prio)
+{
+	struct update_req *ur = ckalloc(sizeof(struct update_req));
+	pthread_t *pth = ckalloc(sizeof(pthread_t));
+
+	ur->pth = pth;
+	ur->ckp = ckp;
+	ur->prio = prio;
+	create_pthread(pth, do_update, ur);
 }
 
 static void drop_allclients(ckpool_t *ckp)
@@ -1068,13 +1110,13 @@ static void stratum_broadcast(json_t *val)
 	if (!bulk_send)
 		return;
 
-	mutex_lock(&ssends->lock);
+	mutex_lock(ssends->lock);
 	if (ssends->msgs)
 		DL_CONCAT(ssends->msgs, bulk_send);
 	else
 		ssends->msgs = bulk_send;
-	pthread_cond_signal(&ssends->cond);
-	mutex_unlock(&ssends->lock);
+	pthread_cond_signal(ssends->cond);
+	mutex_unlock(ssends->lock);
 }
 
 static void stratum_add_send(json_t *val, int64_t client_id)
@@ -1561,6 +1603,114 @@ static bool test_address(ckpool_t *ckp, const char *address)
 	return ret;
 }
 
+static const double nonces = 4294967296;
+
+static double dsps_from_key(json_t *val, const char *key)
+{
+	char *string, *endptr;
+	double ret = 0;
+
+	json_get_string(&string, val, key);
+	if (!string)
+		return ret;
+	ret = strtod(string, &endptr) / nonces;
+	if (endptr) {
+		switch (endptr[0]) {
+			case 'E':
+				ret *= (double)1000;
+			case 'P':
+				ret *= (double)1000;
+			case 'T':
+				ret *= (double)1000;
+			case 'G':
+				ret *= (double)1000;
+			case 'M':
+				ret *= (double)1000;
+			case 'K':
+				ret *= (double)1000;
+			default:
+				break;
+		}
+	}
+	free(string);
+	return ret;
+}
+
+static void read_userstats(ckpool_t *ckp, user_instance_t *instance)
+{
+	char s[512];
+	json_t *val;
+	FILE *fp;
+	int ret;
+
+	snprintf(s, 511, "%s/users/%s", ckp->logdir, instance->username);
+	fp = fopen(s, "re");
+	if (!fp) {
+		LOGINFO("User %s does not have a logfile to read", instance->username);
+		return;
+	}
+	memset(s, 0, 512);
+	ret = fread(s, 1, 511, fp);
+	fclose(fp);
+	if (ret < 1) {
+		LOGINFO("Failed to read user %s logfile", instance->username);
+		return;
+	}
+	val = json_loads(s, 0, NULL);
+	if (!val) {
+		LOGINFO("Failed to json decode user %s logfile: %s", instance->username, s);
+		return;
+	}
+
+	tv_time(&instance->last_share);
+	instance->dsps1 = dsps_from_key(val, "hashrate1m");
+	instance->dsps5 = dsps_from_key(val, "hashrate5m");
+	instance->dsps60 = dsps_from_key(val, "hashrate1hr");
+	instance->dsps1440 = dsps_from_key(val, "hashrate1d");
+	instance->dsps10080 = dsps_from_key(val, "hashrate7d");
+	LOGINFO("Successfully read user %s stats %f %f %f %f %f", instance->username,
+		instance->dsps1, instance->dsps5, instance->dsps60, instance->dsps1440,
+		instance->dsps10080);
+	json_decref(val);
+}
+
+static void read_workerstats(ckpool_t *ckp, worker_instance_t *worker)
+{
+	char s[512];
+	json_t *val;
+	FILE *fp;
+	int ret;
+
+	snprintf(s, 511, "%s/workers/%s", ckp->logdir, worker->workername);
+	fp = fopen(s, "re");
+	if (!fp) {
+		LOGINFO("Worker %s does not have a logfile to read", worker->workername);
+		return;
+	}
+	memset(s, 0, 512);
+	ret = fread(s, 1, 511, fp);
+	fclose(fp);
+	if (ret < 1) {
+		LOGINFO("Failed to read worker %s logfile", worker->workername);
+		return;
+	}
+	val = json_loads(s, 0, NULL);
+	if (!val) {
+		LOGINFO("Failed to json decode worker %s logfile: %s", worker->workername, s);
+		return;
+	}
+
+	tv_time(&worker->last_share);
+	worker->dsps1 = dsps_from_key(val, "hashrate1m");
+	worker->dsps5 = dsps_from_key(val, "hashrate5m");
+	worker->dsps60 = dsps_from_key(val, "hashrate1d");
+	worker->dsps1440 = dsps_from_key(val, "hashrate1d");
+	LOGINFO("Successfully read worker %s stats %f %f %f %f", worker->workername,
+		worker->dsps1, worker->dsps5, worker->dsps60, worker->dsps1440);
+	json_decref(val);
+}
+
+
 /* This simply strips off the first part of the workername and matches it to a
  * user or creates a new one. */
 static user_instance_t *generate_user(ckpool_t *ckp, stratum_instance_t *client,
@@ -1589,6 +1739,7 @@ static user_instance_t *generate_user(ckpool_t *ckp, stratum_instance_t *client,
 
 		instance->id = user_instance_id++;
 		HASH_ADD_STR(user_instances, username, instance);
+		read_userstats(ckp, instance);
 	}
 	DL_FOREACH(instance->instances, tmp) {
 		if (!safecmp(workername, tmp->workername)) {
@@ -1603,6 +1754,7 @@ static user_instance_t *generate_user(ckpool_t *ckp, stratum_instance_t *client,
 		client->worker_instance->workername = strdup(workername);
 		client->worker_instance->instance = instance;
 		DL_APPEND(instance->worker_instances, client->worker_instance);
+		read_workerstats(ckp, client->worker_instance);
 	}
 	DL_APPEND(instance->instances, client);
 	ck_wunlock(&instance_lock);
@@ -1881,6 +2033,7 @@ static void add_submit(ckpool_t *ckp, stratum_instance_t *client, int diff, bool
 	decay_time(&client->dsps5, diff, tdiff, 300);
 	decay_time(&client->dsps60, diff, tdiff, 3600);
 	decay_time(&client->dsps1440, diff, tdiff, 86400);
+	decay_time(&client->dsps10080, diff, tdiff, 604800);
 	copy_tv(&client->last_share, &now_t);
 
 	tdiff = sane_tdiff(&now_t, &worker->last_share);
@@ -1895,6 +2048,7 @@ static void add_submit(ckpool_t *ckp, stratum_instance_t *client, int diff, bool
 	decay_time(&instance->dsps5, diff, tdiff, 300);
 	decay_time(&instance->dsps60, diff, tdiff, 3600);
 	decay_time(&instance->dsps1440, diff, tdiff, 86400);
+	decay_time(&instance->dsps10080, diff, tdiff, 604800);
 	copy_tv(&instance->last_share, &now_t);
 	client->idle = false;
 
@@ -2452,10 +2606,13 @@ static void update_client(stratum_instance_t *client, const int64_t client_id)
 	stratum_send_diff(client);
 }
 
-static json_params_t *create_json_params(const int64_t client_id, const json_t *params, const json_t *id_val, const char *address)
+static json_params_t
+*create_json_params(const int64_t client_id, json_t *method, const json_t *params,
+		    const json_t *id_val, const char *address)
 {
 	json_params_t *jp = ckalloc(sizeof(json_params_t));
 
+	jp->method = json_copy(method);
 	jp->params = json_deep_copy(params);
 	jp->id_val = json_deep_copy(id_val);
 	jp->client_id = client_id;
@@ -2541,8 +2698,8 @@ static void suggest_diff(stratum_instance_t *client, const char *method, json_t
 	client->suggest_diff = sdiff;
 	if (client->diff == sdiff)
 		return;
-	if (sdiff < client->diff * 2 / 3)
-		client->diff = client->diff * 2 / 3;
+	if (sdiff < client->ckp->mindiff)
+		client->diff = client->ckp->mindiff;
 	else
 		client->diff = sdiff;
 	stratum_send_diff(client);
@@ -2609,7 +2766,7 @@ static void parse_method(const int64_t client_id, json_t *id_val, json_t *method
 	}
 
 	if (cmdmatch(method, "mining.auth") && client->subscribed) {
-		json_params_t *jp = create_json_params(client_id, params_val, id_val, address);
+		json_params_t *jp = create_json_params(client_id, method_val, params_val, id_val, address);
 
 		ckmsgq_add(sauthq, jp);
 		return;
@@ -2627,7 +2784,7 @@ static void parse_method(const int64_t client_id, json_t *id_val, json_t *method
 	}
 
 	if (cmdmatch(method, "mining.submit")) {
-		json_params_t *jp = create_json_params(client_id, params_val, id_val, address);
+		json_params_t *jp = create_json_params(client_id, method_val, params_val, id_val, address);
 
 		ckmsgq_add(sshareq, jp);
 		return;
@@ -2640,7 +2797,7 @@ static void parse_method(const int64_t client_id, json_t *id_val, json_t *method
 
 	/* Covers both get_transactions and get_txnhashes */
 	if (cmdmatch(method, "mining.get")) {
-		json_params_t *jp = create_json_params(client_id, method_val, id_val, address);
+		json_params_t *jp = create_json_params(client_id, method_val, params_val, id_val, address);
 
 		ckmsgq_add(stxnq, jp);
 		return;
@@ -2751,6 +2908,7 @@ static void ssend_process(ckpool_t *ckp, smsg_t *msg)
 
 static void discard_json_params(json_params_t **jp)
 {
+	json_decref((*jp)->method);
 	json_decref((*jp)->params);
 	json_decref((*jp)->id_val);
 	free(*jp);
@@ -2939,7 +3097,8 @@ static json_t *txnhashes_by_jobid(int64_t id)
 
 static void send_transactions(ckpool_t *ckp, json_params_t *jp)
 {
-	const char *msg = json_string_value(jp->params);
+	const char *msg = json_string_value(jp->method),
+		*params = json_string_value(json_array_get(jp->params, 0));
 	stratum_instance_t *client;
 	json_t *val, *hashes;
 	int64_t job_id = 0;
@@ -2956,8 +3115,12 @@ static void send_transactions(ckpool_t *ckp, json_params_t *jp)
 
 		/* We don't actually send the transactions as that would use
 		 * up huge bandwidth, so we just return the number of
-		 * transactions :) */
-		sscanf(msg, "mining.get_transactions(%lx", &job_id);
+		 * transactions :) . Support both forms of encoding the
+		 * request in method name and as a parameter. */
+		if (params && strlen(params) > 0)
+			sscanf(params, "%lx", &job_id);
+		else
+			sscanf(msg, "mining.get_transactions(%lx", &job_id);
 		txns = transactions_by_jobid(job_id);
 		if (txns != -1) {
 			json_set_int(val, "result", txns);
@@ -2989,7 +3152,11 @@ static void send_transactions(ckpool_t *ckp, json_params_t *jp)
 		goto out_send;
 	}
 	client->last_txns = now_t;
-	sscanf(msg, "mining.get_txnhashes(%lx", &job_id);
+	if (!params || !strlen(params)) {
+		json_set_string(val, "error", "Invalid params");
+		goto out_send;
+	}
+	sscanf(params, "%lx", &job_id);
 	hashes = txnhashes_by_jobid(job_id);
 	if (hashes) {
 		json_object_set_new_nocheck(val, "result", hashes);
@@ -3002,8 +3169,6 @@ out:
 	discard_json_params(&jp);
 }
 
-static const double nonces = 4294967296;
-
 /* Called every 20 seconds, we send the updated stats to ckdb of those users
  * who have gone 10 minutes between updates. This ends up staggering stats to
  * avoid floods of stat data coming at once. */
@@ -3089,11 +3254,11 @@ static void *statsupdate(void *arg)
 	sleep(1);
 
 	while (42) {
-		double ghs, ghs1, ghs5, ghs15, ghs60, ghs360, ghs1440;
+		double ghs, ghs1, ghs5, ghs15, ghs60, ghs360, ghs1440, ghs10080;
 		double bias, bias5, bias60, bias1440;
 		double tdiff, per_tdiff;
 		char suffix1[16], suffix5[16], suffix15[16], suffix60[16], cdfield[64];
-		char suffix360[16], suffix1440[16];
+		char suffix360[16], suffix1440[16], suffix10080[16];
 		user_instance_t *instance, *tmpuser;
 		stratum_instance_t *client, *tmp;
 		double sps1, sps5, sps15, sps60;
@@ -3136,6 +3301,10 @@ static void *statsupdate(void *arg)
 		ghs1440 = stats.dsps1440 * nonces / bias1440;
 		suffix_string(ghs1440, suffix1440, 16, 0);
 
+		bias = time_bias(tdiff, 604800);
+		ghs10080 = stats.dsps10080 * nonces / bias;
+		suffix_string(ghs10080, suffix10080, 16, 0);
+
 		snprintf(fname, 511, "%s/pool/pool.status", ckp->logdir);
 		fp = fopen(fname, "we");
 		if (unlikely(!fp))
@@ -3151,13 +3320,14 @@ static void *statsupdate(void *arg)
 		fprintf(fp, "%s\n", s);
 		dealloc(s);
 
-		JSON_CPACK(val, "{ss,ss,ss,ss,ss,ss}",
+		JSON_CPACK(val, "{ss,ss,ss,ss,ss,ss,ss}",
 				"hashrate1m", suffix1,
 				"hashrate5m", suffix5,
 				"hashrate15m", suffix15,
 				"hashrate1hr", suffix60,
 				"hashrate6hr", suffix360,
-				"hashrate1d", suffix1440);
+				"hashrate1d", suffix1440,
+				"hashrate7d", suffix10080);
 		s = json_dumps(val, JSON_NO_UTF8 | JSON_PRESERVE_ORDER);
 		json_decref(val);
 		LOGNOTICE("Pool:%s", s);
@@ -3189,6 +3359,7 @@ static void *statsupdate(void *arg)
 				decay_time(&client->dsps5, 0, per_tdiff, 300);
 				decay_time(&client->dsps60, 0, per_tdiff, 3600);
 				decay_time(&client->dsps1440, 0, per_tdiff, 86400);
+				decay_time(&client->dsps10080, 0, per_tdiff, 604800);
 				if (per_tdiff > 600)
 					client->idle = true;
 				continue;
@@ -3211,13 +3382,13 @@ static void *statsupdate(void *arg)
 				ghs = worker->dsps1 * nonces;
 				suffix_string(ghs, suffix1, 16, 0);
 
-				ghs = worker->dsps5 * nonces / bias5;
+				ghs = worker->dsps5 * nonces;
 				suffix_string(ghs, suffix5, 16, 0);
 
-				ghs = worker->dsps60 * nonces / bias60;
+				ghs = worker->dsps60 * nonces;
 				suffix_string(ghs, suffix60, 16, 0);
 
-				ghs = worker->dsps1440 * nonces / bias1440;
+				ghs = worker->dsps1440 * nonces;
 				suffix_string(ghs, suffix1440, 16, 0);
 
 				JSON_CPACK(val, "{ss,ss,ss,ss}",
@@ -3246,25 +3417,30 @@ static void *statsupdate(void *arg)
 				decay_time(&instance->dsps5, 0, per_tdiff, 300);
 				decay_time(&instance->dsps60, 0, per_tdiff, 3600);
 				decay_time(&instance->dsps1440, 0, per_tdiff, 86400);
+				decay_time(&instance->dsps10080, 0, per_tdiff, 604800);
 				idle = true;
 			}
 			ghs = instance->dsps1 * nonces;
 			suffix_string(ghs, suffix1, 16, 0);
 
-			ghs = instance->dsps5 * nonces / bias5;
+			ghs = instance->dsps5 * nonces;
 			suffix_string(ghs, suffix5, 16, 0);
 
-			ghs = instance->dsps60 * nonces / bias60;
+			ghs = instance->dsps60 * nonces;
 			suffix_string(ghs, suffix60, 16, 0);
 
-			ghs = instance->dsps1440 * nonces / bias1440;
+			ghs = instance->dsps1440 * nonces;
 			suffix_string(ghs, suffix1440, 16, 0);
 
-			JSON_CPACK(val, "{ss,ss,ss,ss,si}",
+			ghs = instance->dsps10080 * nonces;
+			suffix_string(ghs, suffix10080, 16, 0);
+
+			JSON_CPACK(val, "{ss,ss,ss,ss,ss,si}",
 					"hashrate1m", suffix1,
 					"hashrate5m", suffix5,
 					"hashrate1hr", suffix60,
 					"hashrate1d", suffix1440,
+					"hashrate7d", suffix10080,
 					"workers", instance->workers);
 
 			snprintf(fname, 511, "%s/users/%s", ckp->logdir, instance->username);
@@ -3323,6 +3499,7 @@ static void *statsupdate(void *arg)
 			decay_time(&stats.dsps60, stats.unaccounted_diff_shares, 20, 3600);
 			decay_time(&stats.dsps360, stats.unaccounted_diff_shares, 20, 21600);
 			decay_time(&stats.dsps1440, stats.unaccounted_diff_shares, 20, 86400);
+			decay_time(&stats.dsps10080, stats.unaccounted_diff_shares, 20, 604800);
 
 			stats.unaccounted_shares =
 			stats.unaccounted_diff_shares =
@@ -3370,7 +3547,7 @@ int stratifier(proc_instance_t *pi)
 {
 	pthread_t pth_blockupdate, pth_statsupdate, pth_heartbeat;
 	ckpool_t *ckp = pi->ckp;
-	int ret = 1;
+	int ret = 1, threads;
 	char *buf;
 
 	LOGWARNING("%s stratifier starting", ckp->name);
@@ -3414,7 +3591,9 @@ int stratifier(proc_instance_t *pi)
 	mutex_init(&ckdb_lock);
 	ssends = create_ckmsgq(ckp, "ssender", &ssend_process);
 	srecvs = create_ckmsgq(ckp, "sreceiver", &srecv_process);
-	sshareq = create_ckmsgq(ckp, "sprocessor", &sshare_process);
+	/* Create half as many share processing threads as there are CPUs */
+	threads = sysconf(_SC_NPROCESSORS_ONLN) / 2 ? : 1;
+	sshareq = create_ckmsgqs(ckp, "sprocessor", &sshare_process, threads);
 	sauthq = create_ckmsgq(ckp, "authoriser", &sauth_process);
 	ckdbq = create_ckmsgq(ckp, "ckdbqueue", &ckdbq_process);
 	stxnq = create_ckmsgq(ckp, "stxnq", &send_transactions);