Re: [ceph-users] RBD is very slow

2013-12-28 Thread Markus Martinet
Hello, i don't understand this: Why is a rados bench with an object size of 1MB slower as a bench with object size 4MB? I attached the config in hope this helps. My version of ceph is 0.72.2 under the Debian stable distribution. The public and cluster interfaces are on a 10 GB ethernet network wit

[ceph-users] RBD is very slow

2013-12-26 Thread Markus Martinet
Hello, i have 2 OSD's and 3 MON's. Every OSD is on a 2,5TB LVM/EXT4 storage. Why is the access to the rbd device so slow and what is meaning with "Stddev Bandwidth" in rados bench? See the below statistics: #Create a 1GB file on local Storage and test a local OSD for bandwidth cd /ceph/; dd if=/d

[ceph-users] RBD is very slow

2013-12-26 Thread General Stone
Hello, i have 2 OSD's and 3 MON's. Every OSD is on a 2,5TB LVM/EXT4 storage. Why is the access to the rbd device so slow and what is meaning with "Stddev Bandwidth" in rados bench? See the below statistics: #Create a 1GB file on local Storage and test a local OSD for bandwidth cd /ceph/; dd if=/d