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Feature #63645

open

rbd: scalability issue on Windows due to TCP session count

Added by Lucian Petrut 6 months ago. Updated 3 months ago.

Status:
Pending Backport
Priority:
Normal
Assignee:
Lucian Petrut
Target version:
-
% Done:

0%

Source:
Tags:
backport_processed
Backport:
squid
Reviewed:
Affected Versions:
Pull request ID:
52540

Description

rbd-wnbd doesn't currently reuse OSD connections across disk mappings, which can lead to an excessive amount of TCP sessions, exceeding Windows limits and eventually failing.

An user reported the following scenario [1]: 60 connected rbd volumes per Windows host, 13 ceph nodes with 24 OSDs each, resulting approximately 18720 sessions. This exceeds the Windows default limit (16384).

We can avoid this by having a single rbd-wnbd daemon per host and sharing OSD connections across mappings.

[1] https://ask.cloudbase.it/question/3598/ceph-for-windows-tcp-session-count/

Related issues 1 (0 open — 1 closed)

Copied to rbd - Backport #64675: squid: rbd: scalability issue on Windows due to TCP session countResolvedLucian PetrutActions
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