Bug 1273741

Summary:	[Tier]: Migration of hardlinks failed on tier volume
Product:	[Red Hat Storage] Red Hat Gluster Storage	Reporter:	Rahul Hinduja <rhinduja>
Component:	tier	Assignee:	hari gowtham <hgowtham>
Status:	CLOSED WONTFIX	QA Contact:	Nag Pavan Chilakam <nchilaka>
Severity:	high	Docs Contact:
Priority:	high
Version:	rhgs-3.1	CC:	asrivast, lbailey, nbalacha, nchilaka, rcyriac, rhs-bugs, sankarshan
Target Milestone:	---	Keywords:	ZStream
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Known Issue
Doc Text:	Files with hard links are not promoted or demoted on tiered volumes.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-02-06 17:34:47 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:
Bug Depends On:
Bug Blocks:	1268895, 1276742

Description Rahul Hinduja 2015-10-21 07:27:05 UTC

Description of problem:
=======================

While creating hardlinks of files noticed the migration failure from cold to hot with message "file has hardlinks". Creating bug as tracker for hardlinks:

Tier log snippet:
=================

[2015-10-20 19:06:01.703887] I [MSGID: 109038] [tier.c:476:tier_migrate_using_query_file] 0-tiervolume-tier-dht: Tier 1 src_subvol tiervolume-cold-dht file 562688c6%%H344VEA3BD
[2015-10-20 19:06:01.711186] I [dht-rebalance.c:1103:dht_migrate_file] 0-tiervolume-tier-dht: /thread4/level00/hardlink_to_files/562688c6%%H344VEA3BD: attempting to move from tiervolume-cold-dht to tiervolume-hot-dht
[2015-10-20 19:06:01.714739] W [MSGID: 109023] [dht-rebalance.c:433:__is_file_migratable] 0-tiervolume-tier-dht: Migrate file failed:/thread4/level00/hardlink_to_files/562688c6%%H344VEA3BD: file has hardlinks
[2015-10-20 19:06:01.715836] E [MSGID: 109037] [tier.c:492:tier_migrate_using_query_file] 0-tiervolume-tier-dht: ERROR -22 in current migration 562688c6%%H344VEA3BD /thread4/level00/hardlink_to_files/562688c6%%H344VEA3BD

[2015-10-20 19:06:01.723330] I [MSGID: 109038] [tier.c:476:tier_migrate_using_query_file] 0-tiervolume-tier-dht: Tier 1 src_subvol tiervolume-cold-dht file 56268047%%QI7LKOAXES
[2015-10-20 19:06:01.726445] I [dht-rebalance.c:1103:dht_migrate_file] 0-tiervolume-tier-dht: /thread4/level00/56268047%%QI7LKOAXES: attempting to move from tiervolume-cold-dht to tiervolume-hot-dht
[2015-10-20 19:06:01.728671] W [MSGID: 109023] [dht-rebalance.c:433:__is_file_migratable] 0-tiervolume-tier-dht: Migrate file failed:/thread4/level00/56268047%%QI7LKOAXES: file has hardlinks
[2015-10-20 19:06:01.729906] E [MSGID: 109037] [tier.c:492:tier_migrate_using_query_file] 0-tiervolume-tier-dht: ERROR -22 in current migration 56268047%%QI7LKOAXES /thread4/level00/56268047%%QI7LKOAXES

[2015-10-20 19:06:01.736238] I [MSGID: 109038] [tier.c:476:tier_migrate_using_query_file] 0-tiervolume-tier-dht: Tier 1 src_subvol tiervolume-cold-dht file 56268048%%9DTTKHAP29
[2015-10-20 19:06:01.740812] I [dht-rebalance.c:1103:dht_migrate_file] 0-tiervolume-tier-dht: /thread2/level00/56268048%%9DTTKHAP29: attempting to move from tiervolume-cold-dht to tiervolume-hot-dht
[2015-10-20 19:06:01.743015] W [MSGID: 109023] [dht-rebalance.c:433:__is_file_migratable] 0-tiervolume-tier-dht: Migrate file failed:/thread2/level00/56268048%%9DTTKHAP29: file has hardlinks
[2015-10-20 19:06:01.744684] E [MSGID: 109037] [tier.c:492:tier_migrate_using_query_file] 0-tiervolume-tier-dht: ERROR -22 in current migration 56268048%%9DTTKHAP29 /thread2/level00/56268048%%9DTTKHAP29

[2015-10-20 19:06:01.750841] I [MSGID: 109038] [tier.c:476:tier_migrate_using_query_file] 0-tiervolume-tier-dht: Tier 1 src_subvol tiervolume-cold-dht file 562688c6%%FY4V40PT04
[2015-10-20 19:06:01.755828] I [dht-rebalance.c:1103:dht_migrate_file] 0-tiervolume-tier-dht: /thread2/level00/hardlink_to_files/562688c6%%FY4V40PT04: attempting to move from tiervolume-cold-dht to tiervolume-hot-dht
[2015-10-20 19:06:01.758222] W [MSGID: 109023] [dht-rebalance.c:433:__is_file_migratable] 0-tiervolume-tier-dht: Migrate file failed:/thread2/level00/hardlink_to_files/562688c6%%FY4V40PT04: file has hardlinks
[2015-10-20 19:06:01.760033] E [MSGID: 109037] [tier.c:492:tier_migrate_using_query_file] 0-tiervolume-tier-dht: ERROR -22 in current migration 562688c6%%FY4V40PT04 /thread2/level00/hardlink_to_files/562688c6%%FY4V40PT04

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

glusterfs-3.7.5-0.3.el7rhgs.x86_64


How reproducible:
=================

Always


Steps to Reproduce:
===================
1. Create files from client using:
crefi --multi -n 10 -b 10 -d 10 --max=1024k --min=5k --random -T 5 -t text -I 5 --fop=create /mnt/fuse/
2. Once data creation is completed, create hardlinks of files using:
crefi --multi -n 10 -b 10 -d 10 --max=1024k --min=5k --random -T 5 -t text -I 5 --fop=hardlink /mnt/fuse/

Actual results:
===============

Hardlinks of files are created successfully from client, but the migration fails. 

Expected results:
=================

Migration should succeed for link files

Comment 3 Nag Pavan Chilakam 2015-10-27 06:38:30 UTC

we need to document the limitation.
Removing blocker tag

Comment 20 Shyamsundar 2018-02-06 17:34:47 UTC

Thank you for your bug report.

This bug has documentation updated on the problem reported.

Further we are no longer releasing any bug fixes or, other updates for Tier. This bug will be set to CLOSED WONTFIX to reflect this.