echo "noop">/sys/block/vda/queue/scheduler echo "1000" >/sys/block/vda/queue/nr_requests echo "8192">/sys/block/vda/queue/read_ahead_kb
[root@nfs tmp]# dd if=test of=/dev/null 39062500+0 records in 39062500+0 records out 20000000000 bytes (20 GB) copied, 244.024 s, 82.0 MB/s Changing these parameters are not affected... Are there other ideas on this problem? Thank you. 2014-02-07 Konrad Gutkowski <konrad.gutkow...@ffs.pl>: > Hi, > > W dniu 07.02.2014 o 08:14 Ирек Фасихов <malm...@gmail.com> pisze: > > [...] > > > Why might such a low speed sequential read? Do ideas on this issue? > > > Iirc you need to set your readahead for the device higher (inside the vm) > to compensate for network rtt. > blockdev --setra x /dev/vda > > > Thanks. > > > -- > С уважением, Фасихов Ирек Нургаязович > Моб.: +79229045757 > > > Regards, > Konrad Gutkowski > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > -- С уважением, Фасихов Ирек Нургаязович Моб.: +79229045757
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