Hi !
I have failover clusters for some aplications. Generally with 2 members
configured with Ubuntu + Drbd + Ext4. For example, my IMAP cluster works
fine with ~ 50k email accounts and my HTTP cluster hosts ~2k sites.
See design here: http://adminlinux.com.br/cluster_design.txt
I would like to provide load balancing instead of just failover. So, I
would like to use a distributed architecture of the filesystem. As we
know, Ext4 isn't a distributed filesystem. So wish to use Ceph in my
clusters.
Any suggestions for design of the cluster with Ubuntu+Ceph?
I built a simple cluster of 2 servers to test simultaneous reading and
writing with Ceph. My conf: http://adminlinux.com.br/ceph_conf.txt
But in my simultaneous benchmarks found errors in reading and writing. I
ran "iozone -t 5 -r 4k -s 2m" simultaneously on both servers in the
cluster. The performance was poor and had errors like this:
Error in file: Found ?0? Expecting ?6d6d6d6d6d6d6d6d? addr b6600000
Error in file: Position 1060864
Record # 259 Record size 4 kb
where b6600000 loop 0
Performance graphs of benchmark: http://adminlinux.com.br/ceph_bench.html
Can you help me find what I did wrong?
Thanks !
--
Thiago Henrique
www.adminlinux.com.br
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