On Thu, Jan 11, 2018 at 6:23 PM, Nikolay Borisov <nbori...@suse.com> wrote: > > > On 11.01.2018 12:51, Ext-Strii-Houttemane Philippe wrote: >> Hello, >> >> We are using btrfs filesystem on local disks (RAID 1) as underlying >> filesystem to host our Oracle 12c datafiles. >> This allow us to cold backup databases via snapshot in a few seconds and >> benefit from higher performance than over Linux filesystem formats. >> This is the problem we meet: Oracle regularly crashes with error of this 2 >> types, the errors occur on different physical machines with same softwares: >> >> ORA-63999: data file suffered media failure >> ORA-01114: IO error writing block to file 99 (block # 99968) >> ORA-01110: data file 99: '/oradata/PS92PRD/data/pcapp.dbf' >> ORA-27072: File I/O error >> Linux-x86_64 Error: 17: File exists
>> Mount options: defaults,nofail,nodatacow,nobarrier,noatime >> >> uname -a: >> Linux 3.10.0-514.10.2.el7.x86_64 #1 SMP Fri Mar 3 00:04:05 UTC 2017 x86_64 >> x86_64 x86_64 GNU/Linux > > You are using a vendor-specific kernel. It's best if you turn to them > for support since it's very likely their code doesn't match what is in > upstream, let alone the fact you are using an ancient kernel. 3.10 is redhat compatible kernel. They put btrfs as tech preview, and will deprecate it after 7.4. So it's probably useless to ask redhat for support on that. @Philippe, you might want to try Oracle's UEK R4. At least they're still promoting btrfs improvements in their kernel, and you might be able to ask them in case of problems (assuming you have proper subscription & support). However IIRC oracle only supports btrfs for its application binary, and not for the data files (again, you should contact oracle support to be sure). If you simply want to use latest kernel (with latest btrfs fixes) to see if your problem still occurs, and don't care about support, you can try kernel-ml (http://elrepo.org/tiki/kernel-ml) or compile your own. -- Fajar -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
