I had this weekend a process stuck in D state writing to a cephfs kernel mount, causing the load of the server go to 80 (normally around 1). Forcing me to reboot it. I think this problem is related to the networking between this vm and ceph nodes. Rsync also sometimes complains about a broken pipe. I am not updating the kernels to often on this server, because I do not want to reboot it if it is not necessary. I am still at 3.10.0-514.21.2.el7.x86_64. Now I am going to upgrade of course to the latest of CentOS 7.6. Regardless of investigating the networking issue. Are there any other mitigations I can apply. - Maybe move to the 4.x kernel, does that make a big difference? - how to prevent the D state process to accumulate so much load? Thanks, _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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