archive mirror
 help / color / mirror / Atom feed
* [linux-lvm] The benefits of lvmlockd over clvmd?
@ 2018-01-09  3:15 Eric Ren
  2018-01-09 16:06 ` David Teigland
  0 siblings, 1 reply; 8+ messages in thread
From: Eric Ren @ 2018-01-09  3:15 UTC (permalink / raw)
  To: David Teigland, LVM general discussion and development

Hi David,

Regarding the question of the subject, I can think of three main 
benefits of lvmlockd over clvmd:

- lvmlockd supports two cluster locking plugins: dlm and sanlock. 
sanlock plugin can supports up to ~2000 nodes
  that benefits LVM usage in big virtulizaton/storage cluster, while dlm 
plugin fits HA clsuter.

- lvmlockd has better design than clvmd. clvmd is command-line level 
based locking system, which means the
  whole LVM software will get hang if any LVM command gets dead-locking 
issue. However, lvmlockd is *resources* based
cluster locking. The resources to protect is VG and LV so that the 
deadlock issue will be isolated inside the resource and
operations on other VG/LV can still proceed.

- lvmlockd can work with lvmetad.

But, I may be wrong in some points. Could you please help correct me and 
complete the benefit list?


^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2018-01-10 17:25 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-01-09  3:15 [linux-lvm] The benefits of lvmlockd over clvmd? Eric Ren
2018-01-09 16:06 ` David Teigland
2018-01-10  7:11   ` Eric Ren
2018-01-10  9:36     ` Zdenek Kabelac
2018-01-10 14:42       ` Eric Ren
2018-01-10 15:35         ` Zdenek Kabelac
2018-01-10 17:25           ` David Teigland
2018-01-10 16:45     ` David Teigland

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).