What come first in my mind is GlusterFS, just my 2 cents. Cheers Le 23/05/2014 20:41, Listas at Adminlinux a ?crit : > 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 ! > -- C?dric
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