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-bounces@xxxxxxxxxxxxxx] On Behalf Of flisky Sent: Tuesday, December 01, 2015 11:04 AM To: ceph-users@xxxxxxxxxxxxxx Subject: Re: 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@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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