After changing the settings below. The linux guest has an good write speed. But still the FreeNas guest stays on 10MB/s. After doing some test on freebsd with with an bigger blocksize: "dd if=/dev/zero of=testfile bs=9000" I get about 80MB/s. With "dd if=/dev/zero of=testfile" the speed is 10MB/s. What can I do? Kind regards, Michiel Piscaer On 23-11-16 10:02, M. Piscaer wrote: > Hi, > > Thank you for your help. > > After changing these settings the linux guest got en increase in speed. > The FreeNAS guest still has an write speed of 10MB/s. > > The disk driver is virtio and has en Write back cache. > > What am I missing? > > Kinds regards, > > Michiel Piscaer > > On 23-11-16 08:05, Оралов, Алексей С. wrote: >> hello, Michiel >> >> Use hdd driver "virtio" and cache "Write back". >> >> And also on proxmox node add ceph client configuration: >> >> /etc/ceph/ceph.conf >> >> [client] >> #admin socket = /var/run/ceph/$cluster-$type.$id.$pid.$cctid.asok >> rbd cache = true >> rbd_cache_writethrough_until_flush = true >> rbd_readahead_disable_after_bytes=0 >> rbd_default_format = 2 >> >> #Tuning options >> #rbd_cache_size = 67108864 #64M >> #rbd_cache_max_dirty = 50331648 #48M >> #rbd_cache_target_dirty = 33554432 #32M >> #rbd_cache_max_dirty_age = 2 >> #rbd_op_threads = 10 >> #rbd_readahead_trigger_requests = 10 >> >> >> 23.11.2016 9:53, M. Piscaer пишет: >>> Hi, >>> >>> I have an little performance problem with KVM and Ceph. >>> >>> I'm using Proxmox 4.3-10/7230e60f, with KVM version >>> pve-qemu-kvm_2.7.0-8. Ceph is on version jewel 10.2.3 on both the >>> cluster as the client (ceph-common). >>> >>> The systems are connected to the network via an 4x bonding with an total >>> of 4 Gb/s. >>> >>> Within an guest, >>> - when I do an write to I get about 10 MB/s. >>> - Also when I try to do an write within the guest but then directly to >>> ceph I get the same speed. >>> - But when I mount an ceph object on the Proxmox host I get about 110MB/s >>> >>> The guest is connected to interface vmbr160 → bond0.160 → bond0. >>> >>> This bridge vmbr160 has an IP address with the same subnet as the ceph >>> cluster with an mtu 9000. >>> >>> The KVM block device is an virtio device. >>> >>> What can I do to solve this problem? >>> >>> Kind regards, >>> >>> Michiel Piscaer >>> _______________________________________________ >>> ceph-users mailing list >>> ceph-users@xxxxxxxxxxxxxx >>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> -- E-mail: michiel@xxxxxxxxxxxxxxx Telefoon: +31 77 7501700 Fax: +31 77 7501701 Mobiel: +31 6 16048782 Threema: PBPCM9X3 PGP: 0x09F8706A W3: www.digidiensten.nl _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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