PING_PONG(1)

📦
version 4.24.7 · 15 versions
, in fedora 44, ubuntu noble

💖 PING_PONG — ok bestie let's talk lock latency 💖

soooo this is ping_pong(1) from the CTDB — clustered TDB database manual, and it is literally the tool you want when you need to know how slow your byte range locks are being. no cap.

✨ NAME ✨

ping_pong — measures the ping-pong byte range lock latency 🏓

🌸 SYNOPSIS 🌸

ping_pong {-r | -w | -rw} [-m] [-c] {FILENAME} {NUM-LOCKS}

🦋 DESCRIPTION 🦋

ok so ping_pong measures the byte range lock latency. it's especially useful when you've got a cluster of nodes all sharing one common lock manager, because it gives you a little vibe check on how that lock manager is holding up under stress. 💅

FILENAME is a file on shared storage that you're using for the byte range locking tests.

NUM-LOCKS is the number of byte range locks — and bestie, listen, it needs to be (strictly) greater than the number of nodes in the cluster. like, strictly. no sneaking around it. 🙈

🎀 OPTIONS 🎀

  • -r — test read performance 📖
  • -w — test write performance ✍️
  • -m — use mmap 🗺️
  • -c — validate the locks ✅

🔥 EXAMPLES 🔥

Testing lock coherence 🧚

ping_pong test.dat N

Testing lock coherence with lock validation 💜

ping_pong -c test.dat N

Testing IO coherence 🌈

ping_pong -rw test.dat N

👑 SEE ALSO 👑

ctdb(7), https://wiki.samba.org/index.php/Ping_pong

🍓 AUTHOR 🍓

This documentation was written by Mathieu Parent. iconic of them honestly.

Copyright © 2002 Andrew Tridgell

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, see http://www.gnu.org/licenses.

fr fr, that's the whole license blurb, don't skip it, it's giving legally binding ✋

and that's the tea ☕ — this page is from the ctdb collection, dated 09/09/2026. go measure some latency, bestie, you're gonna slay 💅✨🫶

📦 where this page comes from