> > Hi,all > > we use openstack + ceph(hammer) in my production > > Hammer is soooooo 2015. > > > There are 22 osds on a host and 11 osds share one ssd for osd journal. > > I can’t imagine a scenario in which this strategy makes sense, the documentation and books are quite clear on why this is a bad idea. Assuming that your OSDs are HDD and the journal devices are SATA SSD, the journals are going to be a bottleneck, and you’re going to wear through them quickly. If you have a read-mostly workload, colocating them would be safer. Oh, i am wrong,we use sas ssd. > I also suspect that something is amiss with your CRUSH topology that is preventing recovery, and/or you actually have multiple overlapping failures. > My crushmap is at https://github.com/rongzhen-zhan/myfile/blob/master/crushmap _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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