Re: [Lustre-discuss] Lost folders after changing MDS

[Alastair Ferguson]

Thanks for the email Andreas - I actually sorted this one out. I recopied the MDS database and it worked. I think the unzipping process didn't finish properly the first time. I now have a fully functional 95TB backup filesystem. Alastair Ferguson IT Manager Capital Markets CRC Limited (CMCRC) Telephone: +61 2 8088 4222 Mobile: +61 424 235 159 Fax: +61 2 8088 4201 www.cmcrc.com  Capital Markets CRC Ltd - Confidential Communication The information contained in this e-mail is confidential.  It is intended for the addressee only.  If you receive this e-mail by mistake please promptly inform us by reply e-mail and then delete the e-mail and destroy any printed copy. You must not disclose or use in any way the information in the e-mail. There is no warranty that this e-mail is error or virus free. It may be a private communication, and if so, does not represent the views of the CMCRC and its associates.  If it is a private communication, care should be taken in opening it to ensure that undue offence is not given. On 16/02/2013, at 7:11 PM, "Dilger, Andreas" <andreas.dil...@intel.com> wrote: On 2013-02-14, at 9:46, "Alastair Ferguson" <afergu...@cmcrc.com<mailto:afergu...@cmcrc.com>> wrote: OK, so our old MDS had hardware issues so I configured a new MGS / MDS on a VM (this is a backup lustre filesystem and I wanted to separate the MGS / MDS from OSS of the previous), and then did this When you write that your files are missing, do you mean that they do not appear with "ls -l", or that they are present but contain no data? I also upgraded from 1.8.8 to 2. I managed to mount the Lustre filesystem Just as a general sysadmin rule, doing too many things at once makes it difficult to figure out what went wrong. Was it the data migration?  Splitting off the MGS? Upgrading to 2.x (you don't report which version)? However, there are hardly any files or folders there - most of them have disappeared, but they are clearly on the OSTs (according to the above command). Is there any way I can reindex the OST'S / MDS to recognise the files and folders properly? Do you still have the old MDT storage? Have your mounted the new MDT as type ldiskfs to see if your files are there?  They would be located below the "ROOT/" directory inside the MDT filesystem. Cheers, Andreas <image.png>

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