Bug 1611944

Summary:	[RGW:NFS] Using 'dd' for writing large files on the NFS, fails.
Product:	[Red Hat Storage] Red Hat Ceph Storage	Reporter:	Vidushi Mishra <vimishra>
Component:	RGW	Assignee:	Matt Benjamin (redhat) <mbenjamin>
Status:	CLOSED DUPLICATE	QA Contact:	Vidushi Mishra <vimishra>
Severity:	medium	Docs Contact:
Priority:	low
Version:	3.1	CC:	anharris, cbodley, ceph-eng-bugs, hnallurv, kbader, mbenjamin, pasik, sweil
Target Milestone:	rc
Target Release:	4.0
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-02-20 14:46:59 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 Vidushi Mishra 2018-08-03 06:38:49 UTC

Description of problem:

Cannot write a large size file on the NFS mount when using 'dd' utility. 

[root@host ubuntu]# mount -osync -t nfs -o nfsvers=4,noauto,soft,proto=tcp nfs_server:/ nfs1
[root@host ubuntu]# ls nfs1/cephobject/
cephnfs.bucky.0  cephnfs.bucky.1  test

[root@host cephobject]# cd test/
[root@host test]#  dd if=/dev/urandom of=file2 bs=10M count=300
dd: error writing ‘file2’: Input/output error
59+0 records in
58+0 records out
608174080 bytes (608 MB) copied, 29.4651 s, 20.6 MB/s



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

ceph version 12.2.5-37.el7cp
nfs-ganesha-rgw-2.5.5-100.el7cp.x86_64
nfs-ganesha-2.5.5-100.el7cp.x86_64


How reproducible:
2/2

Steps to Reproduce:
1. Configure NFS server on an RGW  and configure NFS client and mount share with NFSv3 or NFSv4.
2. Create a file and write say 3G of data using 'dd'
3. Operation fails with IO error.

Comment 3 Drew Harris 2019-02-20 14:46:59 UTC


*** This bug has been marked as a duplicate of bug 1418606 ***