Bug 1492589

Summary:	[RGW:NFS]: Writing a large size file fails on the NFS mount
Product:	Red Hat Ceph Storage	Reporter:	Vidushi Mishra <vimishra>
Component:	RGW	Assignee:	Matt Benjamin (redhat) <mbenjamin>
Status:	CLOSED ERRATA	QA Contact:	Vidushi Mishra <vimishra>
Severity:	medium	Docs Contact:	Bara Ancincova <bancinco>
Priority:	high
Version:	3.0	CC:	anharris, cbodley, ceph-eng-bugs, flucifre, hnallurv, jbrier, kbader, kdreyer, mbenjamin, owasserm, rperiyas, sweil
Target Milestone:	rc
Target Release:	3.1
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	RHEL: ceph-12.2.5-35.el7cp Ubuntu: ceph_12.2.5-20redhat1xenial	Doc Type:	Known Issue
Doc Text:	.The Ceph Object Gateway requires applications to write sequentially The Ceph Object Gateway requires applications to write sequentially from offset 0 to the end of a file. Attempting to write out of order causes the upload operation to fail. To work around this issue, use utilities like `cp`, `cat`, or `rsync` when copying files into NFS space. Always mount with the `sync` option.	Story Points:	---
Clone Of:
Clones:	1647139 (view as bug list)		Environment:
Last Closed:	2018-09-26 18:16:44 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:
Bug Depends On:
Bug Blocks:	1494421, 1584264

Description Vidushi Mishra 2017-09-18 09:19:53 UTC

Description of problem:
Cannot write a large size file on the NFS mount. Tried writing 500Mb but it fails with IO error.
[root@host mnt2]# dd if=/dev/urandom of=test2/file1  bs=10M count=50
dd: closing output file ‘test2/file1’: Input/output error
[root@host mnt2]# 
Considering S3 has a limit of 5GB in a single PUT operation, what is the maximum file size we can directly write in a directory in the NFS mount? 

Version-Release number of selected component (if applicable):
ceph version 12.2.0-2.el7cp
nfs-ganesha-rgw-2.5.2-2.el7cp.x86_64
nfs-ganesha-2.5.2-2.el7cp.x86_64

How reproducible:
3/3

Steps to Reproduce:
1. Configure NFS server on an RGW  and configure NFS client and mount share with NFSv3.
2. Create a file and write 500Mb of data
3. Operation fails with IO error

Actual results:


Expected results:

Comment 26 errata-xmlrpc 2018-09-26 18:16:44 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:2819