Hi,
On 02/03/2016 08:09 PM, ML mail wrote:
Dear Aravinda,
Thank you for the analysis and submitting a patch for this issue. I hope it can make it into the next GlusterFS release 3.7.7.
As suggested I ran the find_gfid_issues.py script on my brick on the two master nodes and slave nodes but the only output it shows to me is the following:
You need to run the script only in Slave.
NO GFID(DIR) : /data/myvolume-geo/brick/test
NO GFID(DIR) : /data/myvolume-geo/brick/data
NO GFID(DIR) : /data/myvolume-geo/brick/data/files_encryption
NO GFID(DIR) : /data/myvolume-geo/brick/data/username
As you can see there are no files at all. So I am still left with 394 files of 0 kBytes on my geo-rep slave node. Do you have any suggestion how to cleanup this mess?
Do you mean to say script shows only 4 directories, but there are 394
files on slave node?
Ok, as of now there is no automatic way of cleaning these files..and you
need to manually remove them.
You can follow these steps:
1. stop geo-replication session.
2. get list of all 0 kByte files and delete them.
It is important to ensure there is no source file exists in master
for those files.
( For example, logo-login-09.svg.ocTransferId1789604916.part is 0 kByte
file, ensure no such source file exists in master
Otherwise, you may end up delete files which are in sync progress)
3. Start geo-replication session.
With the patch coming in, these errors should not be encountered in future.
Thanks,
Saravana
Best regards
ML
On Tuesday, February 2, 2016 7:59 AM, Aravinda <avishwan@xxxxxxxxxx> wrote:
Hi ML,
We analyzed the issue. Looks like Changelog is replayed may be because
of Geo-rep worker crash or Active/Passive switch or both Geo-rep workers
becoming active.
From changelogs,
CREATE logo-login-04.svg.part
RENAME logo-login-04.svg.part logo-login-04.svg
When it is replayed,
CREATE logo-login-04.svg.part
RENAME logo-login-04.svg.part logo-login-04.svg
CREATE logo-login-04.svg.part
RENAME logo-login-04.svg.part logo-login-04.svg
During replay backend GFID link is broken and Geo-rep failed to cleanup.
Milind is working on the patch to fix the same. Patches are in review
and expected to be available in 3.7.8 release.
http://review.gluster.org/#/c/13316/
http://review.gluster.org/#/c/13189/
Following script can be used to find problematic file in each Brick backend.
https://gist.github.com/aravindavk/29f673f13c2f8963447e
regards
Aravinda
On 02/01/2016 08:45 PM, ML mail wrote:
Sure, I will just send it to you through an encrypted cloud storage app and send you the password via private mail.
Regards
ML
On Monday, February 1, 2016 3:14 PM, Saravanakumar Arumugam <sarumuga@xxxxxxxxxx> wrote:
On 02/01/2016 07:22 PM, ML mail wrote:
I just found out I needed to run the getfattr on a mount and not on the glusterfs server directly. So here are the additional output you asked for:
# getfattr -n glusterfs.gfid.string -m . logo-login-09.svg
# file: logo-login-09.svg
glusterfs.gfid.string="1c648409-e98b-4544-a7fa-c2aef87f92ad"
# grep 1c648409-e98b-4544-a7fa-c2aef87f92ad /data/myvolume/brick/.glusterfs/changelogs -rn
Binary file /data/myvolume/brick/.glusterfs/changelogs/CHANGELOG.1454278219 matches
Great! Can you share the CHANGELOG ? ( It contains various fops
carried out on this gfid)
Regards
ML
On Monday, February 1, 2016 1:30 PM, Saravanakumar Arumugam <sarumuga@xxxxxxxxxx> wrote:
Hi,
On 02/01/2016 02:14 PM, ML mail wrote:
Hello,
I just set up distributed geo-replication to a slave on my 2 nodes' replicated volume and noticed quite a few error messages (around 70 of them) in the slave's brick log file:
The exact log file is: /var/log/glusterfs/bricks/data-myvolume-geo-brick.log
[2016-01-31 22:19:29.524370] E [MSGID: 113020] [posix.c:1221:posix_mknod] 0-myvolume-geo-posix: setting gfid on /data/myvolume-geo/brick/data/username/files/shared/logo-login-09.svg.ocTransferId1789604916.part failed
[2016-01-31 22:19:29.535478] W [MSGID: 113026] [posix.c:1338:posix_mkdir] 0-myvolume-geo-posix: mkdir (/data/username/files_encryption/keys/files/shared/logo-login-09.svg.ocTransferId1789604916.part): gfid (15bbcec6-a332-4c21-81e4-c52472b1e13d) isalready associated with directory (/data/myvolume-geo/brick/.glusterfs/49/5d/495d6868-4844-4632-8ff9-ad9646a878fe/logo-login-09.svg). Hence,both directories will share same gfid and thiscan lead to inconsistencies.
Can you grep for this gfid(of the corresponding files) in changelogs and
share those files ?
{
For example:
1. Get gfid of the files like this:
# getfattr -n glusterfs.gfid.string -m . /mnt/slave/file456
getfattr: Removing leading '/' from absolute path names
# file: mnt/slave/file456
glusterfs.gfid.string="05b22446-de9e-42df-a63e-399c24d690c4"
2. grep for the corresponding gfid in brick back end like below:
[root@gfvm3 changelogs]# grep 05b22446-de9e-42df-a63e-399c24d690c4
/opt/volume_test/tv_2/b1/.glusterfs/changelogs/ -rn
Binary file
/opt/volume_test/tv_2/b1/.glusterfs/changelogs/CHANGELOG.1454135265 matches
Binary file
/opt/volume_test/tv_2/b1/.glusterfs/changelogs/CHANGELOG.1454135476 matches
}
This will help in understanding what operations are carried out in
master volume, which leads to this inconsistency.
Also, get the following:
gluster version
gluster volume info
gluster volume geo-replication status
This doesn't look good at all because the file mentioned in the error message (
logo-login-09.svg.ocTransferId1789604916.part) is left there with 0 kbytes and does not get deleted or cleaned up by glusterfs, leaving my geo-rep slave node in an inconsistent state which does not reflect the reality from the master nodes. The master nodes don't have that file anymore (which is correct). Here below is an "ls" of the concerned file with the correct file on top.
-rw-r--r-- 2 www-data www-data 24312 Jan 6 2014 logo-login-09.svg
-rw-r--r-- 1 root root 0 Jan 31 23:19 logo-login-09.svg.ocTransferId1789604916.part
Rename issues in geo-replication are fixed lately. This looks similar to
one.
Thanks,
Saravana
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