[Lustre-discuss] Lustre Mount Crashing

[Dennis Nelson]

Todd,

Does this make sense?  He is saying that OSTs need to be mounted first?  I
thought that they sould not connect if the MDT is not mounted.



On 6/2/08 10:45 AM, "Brian J. Murrell" <Brian.Murrell at Sun.COM> wrote:

> On Mon, 2008-06-02 at 11:35 -0400, Charles Taylor wrote:
>> 
>> Well, I figured someone would ask that.  :)    The last messages that
>> make it to syslog prior to the crash are....
>> 
>> Jun  2 10:29:54 hpcmds kernel: LDISKFS FS on md2, internal journal
>> Jun  2 10:29:54 hpcmds kernel: LDISKFS-fs: recovery complete.
>> Jun  2 10:29:54 hpcmds kernel: LDISKFS-fs: mounted filesystem with
>> ordered data mode.
>> Jun  2 10:29:54 hpcmds kernel: kjournald starting.  Commit interval 5
>> seconds
>> Jun  2 10:29:54 hpcmds kernel: LDISKFS FS on md2, internal journal
>> Jun  2 10:29:54 hpcmds kernel: LDISKFS-fs: mounted filesystem with
>> ordered data mode.
>> Jun  2 10:29:54 hpcmds kernel: Lustre: MGS MGS started
>> Jun  2 10:29:54 hpcmds kernel: Lustre: Enabling user_xattr
>> Jun  2 10:29:54 hpcmds kernel: Lustre: 4540:0:(mds_fs.c:
>> 446:mds_init_server_data()) RECOVERY: service ufhpc-MDT0000, 100
>> recoverable clients, last_transno 9412464331
>> Jun  2 10:29:54 hpcmds kernel: Lustre: MDT ufhpc-MDT0000 now serving
>> dev (ufhpc-MDT0000/cac99db5-a66a-a6ac-4649-6ec8cc2dc0e7), but will be
>> in recovery until 100 clients reconnect, or if no clients reconnect
>> for 4:10; during that time new clients will not be allowed to connect.
>> Recovery progress can be monitored by watching /proc/fs/lustre/mds/
>> ufhpc-MDT0000/recovery_status.
>> Jun  2 10:29:55 hpcmds kernel: Lustre: 4540:0:(mds_lov.c:
>> 858:mds_notify()) MDS ufhpc-MDT0000: in recovery, not resetting
>> orphans on ufhpc-OST0004_UUID
>> Jun  2 10:29:55 hpcmds kernel: Lustre: 4540:0:(mds_lov.c:
>> 858:mds_notify()) MDS ufhpc-MDT0000: in recovery, not resetting
>> orphans on ufhpc-OST0005_UUID
> 
> This is all perfectly normal.  Is there anything else or does this
> amount to all that you are seeing?
> 
>> Note that all of the clients are powered off and the OSS's are
>> currently unmounted (though they appear to be fine).
> 
> Does anything bad happen when you bring up the OSSes?  Ideally, OSTs
> should be brought up before the MDT but there is no requirement for
> that.
> 
>> If it crashes
> 
> Do you have messages from a crash?
> 
>> a third time, and I suspect it will, I'll include some
>> of the stack trace.
> 
> Unless you are getting some kind of kernel panic, that stack trace
> should be in the syslog.
> 
> b.
> 
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