[Bugs] [Bug 1744883] New: GlusterFS problem dataloss

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1744883

            Bug ID: 1744883
           Summary: GlusterFS problem dataloss
           Product: GlusterFS
           Version: 6
          Hardware: x86_64
                OS: Linux
            Status: NEW
         Component: glusterd
          Severity: urgent
          Assignee: bugs at gluster.org
          Reporter: nicola.battista89 at gmail.com
                CC: bugs at gluster.org
  Target Milestone: ---
    Classification: Community



Created attachment 1607200
  --> https://bugzilla.redhat.com/attachment.cgi?id=1607200&action=edit
strace output

Description of problem:
Greetings,
MariaDB Columnstore uses GFS bricks as an persistant storage for data. We store
tables data in so-called segment files. Here[1] is the overview how we use GFS
for redundancy.
In your case there are some errors with those segment files that live on GFS.
Here are examples of the errors I've seen on strace of the reading process.

86814 stat("/000.dir/000.dir/015.dir/064.dir/008.dir/FILE002.cdf",
0x7ff488ffdc80) = -1 ENOENT (No such file or directory)
86814 open("/000.dir/000.dir/015.dir/064.dir/008.dir/FILE002.cdf",
O_RDONLY|O_NOATIME) = -1 ENOENT (No such file or directory)

I've attached the strace output itself and you can filter on the segment file
name /000.dir/000.dir/015.dir/064.dir/008.dir/FILE002.cdf to find the relevant
errors.

1.
https://mariadb.com/resources/blog/mariadb-columnstore-data-redundancy-a-look-under-the-hood/

Version-Release number of selected component (if applicable):
GlusterFS version 6.X

Link ticket MariaBD : https://jira.mariadb.org/browse/MCOL-3392

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