We have 4 OSD nodes, each one has 2 SSD for journal disks and 8 SATA disks OSD. Till now, we haven’t enable rbd caching yet.
As our support vendor said, there was an rbd caching related issue found and fixed at the next version of Ceph. So they don’t recommand us to enable rbd caching until Ceph upgraded. From: Jason Dillaman [mailto:[email protected]] Sent: Thursday, October 27, 2016 10:14 PM To: Ahmed Mostafa <[email protected]> Cc: Keynes Lee/WHQ/Wistron <[email protected]>; [email protected] Subject: Re: [ceph-users] Instance filesystem corrupt The only effect I could see out of a highly overloaded system would be that the OSDs might appear to become unresponsive to the VMs. Are any of you using cache tiering or librbd cache? For the latter, there was one issue [1] that can result in read corruption that affects hammer and prior releases. [1] http://tracker.ceph.com/issues/16002 On Thu, Oct 27, 2016 at 1:34 AM, Ahmed Mostafa <[email protected]<mailto:[email protected]>> wrote: This is more or less the same bahaviour i have in ky environment By any chance is anyone running their osds and their hypervisors on the same machine ? And could high workload, like starting 40 - 60 or above virtual machines have an effect on this problem ? On Thursday, 27 October 2016, <[email protected]<mailto:[email protected]>> wrote: Most of filesystem corrupt causes instances crashed, we saw that after a shutdown / restart ( triggered by OpenStack portal buttons or triggered by OS commands in Instances ) Some are early-detected, we saw filesystem errors in OS logs on instances. Then we make a filesystem check ( FSCK / chkdsk ) immediately, issue fixed. [cid:[email protected]] Keynes Lee 李 俊 賢 Direct: +886-2-6612-1025<tel:%2B886-2-6612-1025> Mobile: +886-9-1882-3787 Fax: +886-2-6612-1991<tel:%2B886-2-6612-1991> E-Mail: [email protected]<mailto:[email protected]> From: Jason Dillaman [mailto:[email protected]] Sent: Wednesday, October 26, 2016 9:38 PM To: Keynes Lee/WHQ/Wistron <[email protected]<mailto:[email protected]>> Cc: [email protected]<mailto:[email protected]>; ceph-users <[email protected]<mailto:[email protected]>> Subject: Re: [ceph-users] [EXTERNAL] Instance filesystem corrupt I am not aware of any similar reports against librbd on Firefly. Do you use any configuration overrides? Does the filesystem corruption appears while the instances are running or only after a shutdown / restart of the instance? On Wed, Oct 26, 2016 at 12:46 AM, <[email protected]<mailto:[email protected]>> wrote: No , we are using Firefly (0.80.7). As we are using HPE Helion OpenStack 2.1.5, and what the version is was embedded is Firefly. An upgrade was planning, but should will not happen soon. From: Will.Boege [mailto:[email protected]] Sent: Wednesday, October 26, 2016 12:03 PM To: Keynes Lee/WHQ/Wistron <[email protected]<mailto:[email protected]>>; [email protected]<mailto:[email protected]> Subject: Re: [EXTERNAL] [ceph-users] Instance filesystem corrupt Just out of curiosity, did you recently upgrade to Jewel? From: ceph-users <[email protected]<mailto:[email protected]>> on behalf of "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Date: Tuesday, October 25, 2016 at 10:52 PM To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Subject: [EXTERNAL] [ceph-users] Instance filesystem corrupt We are using OpenStack + Ceph. Recently we found a lot of filesystem corrupt incident on instances. Some of them are correctable, fixed by fsck, but the others have no luck, just corrupt and can never start up again. We found this issue on vary operation systems of instances. They are Redhat4 / CentOS 7 / Windows 2012 Could someone please advise us some troubleshooting direction ? [id:[email protected]] Keynes Lee 李 俊 賢 Direct: +886-2-6612-1025<tel:%2B886-2-6612-1025> Mobile: +886-9-1882-3787 Fax: +886-2-6612-1991<tel:%2B886-2-6612-1991> E-Mail: [email protected]<mailto:[email protected]> --------------------------------------------------------------------------------------------------------------------------------------------------------------- This email contains confidential or legally privileged information and is for the sole use of its intended recipient. Any unauthorized review, use, copying or distribution of this email or the content of this email is strictly prohibited. If you are not the intended recipient, you may reply to the sender and should delete this e-mail immediately. --------------------------------------------------------------------------------------------------------------------------------------------------------------- _______________________________________________ ceph-users mailing list [email protected]<mailto:[email protected]> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com -- Jason -- Jason
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