ceph osd dump, please.
10 янв. 2014 г. 18:29 пользователь "Steffen Thorhauer" <steffen.thorhauer@xxxxxxxxxxxxxxxxxxxxxxx> написал:
On 01/10/2014 02:35 PM, Wido den Hollander wrote:
Op 10 jan. 2014 om 18:49 heeft "Steffen Thorhauer" <steffen.thorhauer@xxxxxxxxxxxxxxxxxxxxxxx> het volgende geschreven:
On 01/10/2014 01:21 PM, Ирек Фасихов wrote:
with this parameter ist not a real performance increase:You need to use VirtIO.
<target dev='vdb' bus='virtio'/>
dd if=/dev/zero of=zerofile-2 bs=1G count=8
8+0 records in
8+0 records out
8589934592 bytes (8.6 GB) copied, 73.8425 s, 116 MB/s
and reading:
trompete@multius:~$ dd if=zerofile-2 of=/dev/null bs=1G count=8
8+0 records in
8+0 records out
8589934592 bytes (8.6 GB) copied, 429.528 s, 20.0 MB/s
What happens if you increase the read_ahead_kb value for the device to 4096k. That is inside the guest.
cat read_ahead_kb
65536
trompete@multius:~$ dd if=zerofile-2 of=/dev/null bs=1G count=8
8+0 records in
8+0 records out
8589934592 bytes (8.6 GB) copied, 382.148 s, 22.5 MB/s
-- ______________________________________________________________________ Steffen Thorhauer Department of Technichal and Business Information Systems (ITI) Faculty of Computer Science (FIN) Otto von Guericke University Magdeburg Universitaetsplatz 2 39106 Magdeburg, Germany phone: 0391 67 52996 fax: 0391 67 12341 email: sth@xxxxxxxxxxxxxxxxxxxxxxx url: http://wwwiti.cs.uni-magdeburg.de/~thorhaue
_______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
