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Bug 1404654

Summary:	io-stats miss statistics when fh is not newly created
Product:	[Community] GlusterFS	Reporter:	dengjin <cheneydeng88>
Component:	io-stats	Assignee:	bugs <bugs>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	mainline	CC:	atumball, bugs, srangana
Target Milestone:	---	Keywords:	Triaged
Target Release:	---
Hardware:	All
OS:	All
URL:	http://www.gluster.org/pipermail/gluster-devel/2016-December/051702.html
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-05-09 20:30:27 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description dengjin 2016-12-14 11:16:12 UTC

Description of problem:
The debug/io-stats only do the "ios_inode_ctx_set" in procedure open,create and mkdir.This bug made the statistic will miss if the entry is not created during the lifetime of the current server/nfs process.


Version-Release number of selected component (if applicable):
All.

How reproducible:
Add some logs to the "io_stats_readv_cbk" and do a read request.
Steps to Reproduce:
1. Add log in the "io_stats_readv_cbk" to differentiate if the inode ctx found.
2. create a file A.
3. restart the server/nfs.
4. read file A and watch the log it will show no ctx found and do no statistics.
5. create a file B.
6. read the file B and watch the log it will show ctx found and do statistics.

Actual results:


Expected results:


Additional info:

Comment 1 dengjin 2016-12-14 12:25:14 UTC

I think it's hard to save the "ios_fd" in the fd_t's ctx because not all the procedures pass "fd" to subvolumes,means statistics on a fd granularity needs more code to do.While it is possible to do statistics in the inode in the mechanism now,the loc_t will carry inode ctx through all the xlators.

Comment 2 Amar Tumballi 2019-05-09 20:30:27 UTC

dengjin, it is complex with anon-fd feature of gluster (specially used for gNFS), and hence i would currently mark it as WONTFIX. We will revisit it when we decide to make gNFS fully supported component.