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Feature #10649

closed

Store MDS tables without size limit

Added by John Spray over 9 years ago. Updated about 9 years ago.

Status:
Resolved
Priority:
Normal
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Category:
-
Target version:
-
% Done:

0%

Source:
other
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Description

Created from #10449

Currently MDS tables are written as single objects, in a single writefull, implicitly limited in size by max OSD write size.

Create enough entries in e.g. sessiontable and MDS will assert on writing the table.

Initially can overcome OSD write limit by switching to an omap. Potentially also add a fragtree to spread the KV store across multiple objects.


Related issues 1 (0 open1 closed)

Related to CephFS - Bug #10449: MDS crashing in "C_SM_Save::finish" due to OSD response "-90 ((90) Message too long"ResolvedZheng Yan01/05/2015

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