Sure..The following settings helped me minimizing the effect a bit for the PR https://github.com/ceph/ceph/pull/6670
sysctl -w fs.xfs.xfssyncd_centisecs=720000 sysctl -w fs.xfs.xfsbufd_centisecs=3000 sysctl -w fs.xfs.age_buffer_centisecs=720000 But, for existing Ceph write path you may need to tweak this.. Thanks & Regards Somnath -----Original Message----- From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of flisky Sent: Tuesday, December 01, 2015 11:04 AM To: ceph-users@lists.ceph.com Subject: Re: [ceph-users] does anyone know what xfsaild and kworker are?they make osd disk busy. produce 100-200iops per osd disk? On 2015年12月02日 01:31, Somnath Roy wrote: > This is xfs metadata sync process...when it is waking up and there are lot of > data to sync it will throttle all the process accessing the drive...There are > some xfs settings to control the behavior, but you can't stop that May I ask how to tune the xfs settings? Thanks! _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
