https://docs.ceph.com/en/quincy/cephfs/createfs/#creating-pools As an additional note: it's recommended to put the metadata pool on a dedicated set of SSDs to prevent client load from disrupting MDS performance. On Fri, Jul 7, 2023 at 4:56 AM Ben <ruidong.gao@xxxxxxxxx> wrote: > > Hi, > > see many of this in cluster log channel. many are blocked with long period > of seconds. It should hurt client access performance. Any ideas to get rid > of them? > > Thanks, > Ben > --------------------------------- > 7/7/23 4:48:50 PM > [WRN] > Health check update: 8 MDSs report slow metadata IOs (MDS_SLOW_METADATA_IO) > > 7/7/23 4:48:09 PM > [WRN] > Health check update: 7 MDSs report slow metadata IOs (MDS_SLOW_METADATA_IO) > > 7/7/23 4:48:09 PM > [INF] > MDS health message cleared (mds.?): 100+ slow metadata IOs are blocked > 30 > secs, oldest blocked for 559 secs > > 7/7/23 4:47:47 PM > [WRN] > Health check update: 8 MDSs report slow metadata IOs (MDS_SLOW_METADATA_IO) > > 7/7/23 4:47:11 PM > [WRN] > Health check update: 7 MDSs report slow metadata IOs (MDS_SLOW_METADATA_IO) > > 7/7/23 4:47:10 PM > [INF] > MDS health message cleared (mds.?): 100+ slow metadata IOs are blocked > 30 > secs, oldest blocked for 377 secs > > 7/7/23 4:46:22 PM > [WRN] > Health check update: 8 MDSs report slow metadata IOs (MDS_SLOW_METADATA_IO) > > 7/7/23 4:46:12 PM > [WRN] > Health check update: 7 MDSs report slow metadata IOs (MDS_SLOW_METADATA_IO) > > 7/7/23 4:45:40 PM > [WRN] > Health check update: 6 MDSs report slow metadata IOs (MDS_SLOW_METADATA_IO) > > 7/7/23 4:45:40 PM > [INF] > MDS health message cleared (mds.?): 100+ slow metadata IOs are blocked > 30 > secs, oldest blocked for 199 secs > > 7/7/23 4:45:12 PM > [WRN] > Health check update: 7 MDSs report slow metadata IOs (MDS_SLOW_METADATA_IO) > > 7/7/23 4:45:07 PM > [WRN] > Health check update: 6 MDSs report slow metadata IOs (MDS_SLOW_METADATA_IO) > > 7/7/23 4:44:58 PM > [INF] > MDS health message cleared (mds.?): 100+ slow metadata IOs are blocked > 30 > secs, oldest blocked for 565 secs > > 7/7/23 4:44:58 PM > [WRN] > Health check update: 7 MDSs report slow metadata IOs (MDS_SLOW_METADATA_IO) > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx > -- Patrick Donnelly, Ph.D. He / Him / His Red Hat Partner Engineer IBM, Inc. GPG: 19F28A586F808C2402351B93C3301A3E258DD79D _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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