[Gluster-users] Need to understand this logging in disperse volume

[Ankireddypalle Reddy]

Hi,
         In our application we replace a file named sample with a file name sample.compact. Here's the sequence of steps.

1)      Rename sample to sample.temp

2)      Rename sample.compact to sample

3)      Unlink sample.temp

Please note that this is a 3:1 disperse volume and each node is also a client. It's a FUSE mount.

Here's the corresponding logging:
[2016-12-24 09:23:25.407934] I [MSGID: 109066] [dht-rename.c:1413:dht_rename] 0-StoragePool-dht: renaming /Folder_07.11.2016_23.02/CV_MAGNETIC/V_8772830/CHUNK_49113632/SFILE_CONTAINER_002 (hash=StoragePool-disperse-6/cache=StoragePool-disperse-6) => /Folder_07.11.2016_23.02/CV_MAGNETIC/V_8772830/CHUNK_49113632/SFILE_CONTAINER_002.temp (hash=StoragePool-disperse-4/cache=<nul>)

[2016-12-24 09:23:25.829296] I [MSGID: 109066] [dht-rename.c:1413:dht_rename] 0-StoragePool-dht: renaming /Folder_07.11.2016_23.02/CV_MAGNETIC/V_8772830/CHUNK_49113632/SFILE_CONTAINER_002.compact (hash=StoragePool-disperse-0/cache=StoragePool-disperse-0) => /Folder_07.11.2016_23.02/CV_MAGNETIC/V_8772830/CHUNK_49113632/SFILE_CONTAINER_002 (hash=StoragePool-disperse-6/cache=<nul>)

At this point of time when I check for the bricks on which the file could be present I see the trusted.ec.config attribute set.


glusterfs.pathinfo="(<DISTRIBUTE:StoragePool-dht> (<EC:StoragePool-disperse-0> <POSIX(/ws/disk1/ws_brick):glusterfs2.commvault.com:/ws/disk1/ws_brick/Folder_07.11.2016_23.02/CV_MAGNETIC/V_8772830/CHUNK_49113632/SFILE_CONTAINER_002> <POSIX(/ws/disk1/ws_brick):glusterfs3.commvault.com:/ws/disk1/ws_brick/Folder_07.11.2016_23.02/CV_MAGNETIC/V_8772830/CHUNK_49113632/SFILE_CONTAINER_002> <POSIX(/ws/disk1/ws_brick):glusterfs1:/ws/disk1/ws_brick/Folder_07.11.2016_23.02/CV_MAGNETIC/V_8772830/CHUNK_49113632/SFILE_CONTAINER_002>))"


ws/disk1/ws_brick/Folder_07.11.2016_23.02/CV_MAGNETIC/V_8772830/CHUNK_49113632/SFILE_CONTAINER_002

trusted.ec.config=0x0000080301000200

But I notice the following logging in the log files.

2016-12-24 09:23:26.759164] W [MSGID: 114031] [client-rpc-fops.c:1848:client3_3_xattrop_cbk] 0-StoragePool-client-14: remote operation failed. Path: /Folder_07.11.2016_23.02/CV_MAGNETIC/V_8772830/CHUNK_49113632/SFILE_CONTAINER_002 (cf977efe-e263-49b9-8099-06b36122e715) [No such file or directory]
[2016-12-24 09:23:26.759202] W [MSGID: 114031] [client-rpc-fops.c:1848:client3_3_xattrop_cbk] 0-StoragePool-client-12: remote operation failed. Path: /Folder_07.11.2016_23.02/CV_MAGNETIC/V_8772830/CHUNK_49113632/SFILE_CONTAINER_002 (cf977efe-e263-49b9-8099-06b36122e715) [No such file or directory]
[2016-12-24 09:23:26.759383] W [MSGID: 114031] [client-rpc-fops.c:1848:client3_3_xattrop_cbk] 0-StoragePool-client-13: remote operation failed. Path: /Folder_07.11.2016_23.02/CV_MAGNETIC/V_8772830/CHUNK_49113632/SFILE_CONTAINER_002 (cf977efe-e263-49b9-8099-06b36122e715) [No such file or directory]

Client 14 is
volume StoragePool-client-14
...
    option remote-subvolume /ws/disk5/ws_brick
...
end-volume

Why is it that the extended attribute is being checked on a wrong brick /ws/disk5 while the correct brick is /ws/disk1. I see lot of these errors being logged.

Thanks and Regards,
Ram
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