Tarantool development patches archive
 help / color / mirror / Atom feed
From: Cyrill Gorcunov <gorcunov@gmail.com>
To: Vladislav Shpilevoy <v.shpilevoy@tarantool.org>
Cc: Mons Anderson <v.perepelitsa@corp.mail.ru>,
	tml <tarantool-patches@dev.tarantool.org>
Subject: Re: [Tarantool-patches] [PATCH v3 2/3] cfg: support symbolic evaluation of replication_synchro_quorum
Date: Mon, 7 Dec 2020 23:17:13 +0300	[thread overview]
Message-ID: <20201207201713.GE2303@grain> (raw)
In-Reply-To: <bae58957-3699-cc0b-aae5-ebe223617e67@tarantool.org>

Here is a diff I force pushed
---
diff --git a/src/box/box.cc b/src/box/box.cc
index b9d078de4..2dfb5bc1c 100644
--- a/src/box/box.cc
+++ b/src/box/box.cc
@@ -578,17 +578,9 @@ eval_replication_synchro_quorum(int nr_replicas)
 			"fmod = math.fmod,"
 		"}})\n"
 		"return math.floor(f())\n";
-	char buf[1024];
 	int value = -1;
-
 	const char *expr = cfg_gets("replication_synchro_quorum");
-	size_t ret = snprintf(buf, sizeof(buf), fmt, expr, nr_replicas);
-	if (ret >= sizeof(buf)) {
-		diag_set(ClientError, ER_CFG,
-			 "replication_synchro_quorum",
-			 "the expression is too big");
-		return -1;
-	}
+	const char *buf = tt_sprintf(fmt, expr, nr_replicas);
 
 	luaL_loadstring(tarantool_L, buf);
 	if (lua_pcall(tarantool_L, 0, 1, 0) != 0) {
@@ -608,17 +600,11 @@ eval_replication_synchro_quorum(int nr_replicas)
 	 * value (say it was n-2) do not treat it as an
 	 * error but just yield a minimum valid magnitude.
 	 */
-	if (value < 0) {
-		const int value_min = 1;
-		say_warn_ratelimited("replication_synchro_quorum evaluated "
-				     "to the negative value %d, set to %d",
-				     value, value_min);
-		value = value_min;
-	} else if (value >= VCLOCK_MAX) {
+	if (value >= VCLOCK_MAX) {
 		const int value_max = VCLOCK_MAX - 1;
-		say_warn_ratelimited("replication_synchro_quorum evaluated "
-				     "to value %d, set to %d",
-				     value, value_max);
+		say_warn("replication_synchro_quorum evaluated "
+			 "to value %d, set to %d",
+			 value, value_max);
 		value = value_max;
 	}

We use tt_sprintf and drop value < 0 test (because we return MAX(1, value)

 
@@ -1001,30 +987,6 @@ box_set_replication_sync_lag(void)
 	replication_sync_lag = box_check_replication_sync_lag();
 }
 
-/**
- * Assign new replication_synchro_quorum value
- * and notify dependent subsystems.
- */
-static void
-set_replication_synchro_quorum(int quorum)
-{
-	assert(quorum > 0 && quorum < VCLOCK_MAX);
-
-	replication_synchro_quorum = quorum;
-	txn_limbo_on_parameters_change(&txn_limbo);
-	box_raft_update_election_quorum();
-}
-
-int
-box_set_replication_synchro_quorum(void)
-{
-	int value = box_check_replication_synchro_quorum();
-	if (value < 0)
-		return -1;
-	set_replication_synchro_quorum(value);
-	return 0;
-}
-
 /**
  * Renew replication_synchro_quorum value if defined
  * as a formula and we need to recalculate it.
@@ -1053,7 +1015,20 @@ box_update_replication_synchro_quorum(void)
 	if (quorum < 0 || quorum >= VCLOCK_MAX)
 		panic("failed to eval replication_synchro_quorum");
 	say_info("update replication_synchro_quorum = %d", quorum);
-	set_replication_synchro_quorum(quorum);
+
+	replication_synchro_quorum = quorum;
+	txn_limbo_on_parameters_change(&txn_limbo);
+	box_raft_update_election_quorum();
+}
+
+int
+box_set_replication_synchro_quorum(void)
+{
+	int value = box_check_replication_synchro_quorum();
+	if (value < 0)
+		return -1;
+	box_update_replication_synchro_quorum();
+	return 0;
 }

Use box_update_replication_synchro_quorum from inside of box_set_replication_synchro_quorum.

I'm working on test now but it is yet incomplete.

  reply	other threads:[~2020-12-07 20:17 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-03 14:04 [Tarantool-patches] [PATCH v3 0/3] qsync: evaluate replication_synchro_quorum dynamically Cyrill Gorcunov
2020-12-03 14:04 ` [Tarantool-patches] [PATCH v3 1/3] cfg: add cfg_isnumber helper Cyrill Gorcunov
2020-12-03 14:04 ` [Tarantool-patches] [PATCH v3 2/3] cfg: support symbolic evaluation of replication_synchro_quorum Cyrill Gorcunov
2020-12-04 23:52   ` Vladislav Shpilevoy
2020-12-07 20:17     ` Cyrill Gorcunov [this message]
2020-12-07 21:25     ` Vladislav Shpilevoy
2020-12-07 21:48       ` Cyrill Gorcunov
2020-12-08  8:02         ` Cyrill Gorcunov
2020-12-09 23:22           ` Vladislav Shpilevoy
2020-12-11 12:25             ` Cyrill Gorcunov
2020-12-13 18:12               ` Vladislav Shpilevoy
2020-12-03 14:04 ` [Tarantool-patches] [PATCH v3 3/3] test: add replication/gh-5446-sqync-eval-quorum.test.lua Cyrill Gorcunov
2020-12-04 23:52   ` Vladislav Shpilevoy
2020-12-08  8:48     ` Cyrill Gorcunov
2020-12-09 23:22       ` Vladislav Shpilevoy
2020-12-04 10:15 ` [Tarantool-patches] [PATCH v3 0/3] qsync: evaluate replication_synchro_quorum dynamically Serge Petrenko

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20201207201713.GE2303@grain \
    --to=gorcunov@gmail.com \
    --cc=tarantool-patches@dev.tarantool.org \
    --cc=v.perepelitsa@corp.mail.ru \
    --cc=v.shpilevoy@tarantool.org \
    --subject='Re: [Tarantool-patches] [PATCH v3 2/3] cfg: support symbolic evaluation of replication_synchro_quorum' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox