>> John, thanks for your answer, I think I'm looking for a hihg performance >> cluster with two pcs... Apache, Mailscanner/Postfix, mysqld and squid >> are going to run in this cluster.. >> >Each of those apps has its own requirements for a shared workload <cluster. frankly, I have no idea how a squid cluster could or would work. >webservers like apache are most frequently clustered by being put behind >a load balancing router such as BigIP from F5. this is $$$$$$. >mysql has its own clustering support, I'm not very familiar with it. >typically, these require shared storage. >not sure why you'd need to cluster a mail server other than high >availability, this typically requires shared storage for the spool files >and such. >I have no idea how you'd loadbalance cluster a squid cacheing proxy >between two systems with discrete SATA drives. maybe if the squid cache >was stored on a NFS server? >frankly, with that workload, and the hardware resources you described, >you'd probably get the best performance by balancing the applications >across the two systems. whichever app requires the most resource, put >it on one, put the rest on the other. if the 'other' is overloaded, >move another task to the first. John, I'm reading now some stuff of clustering from internet, thanks for your opinion, let me ask you, (maybe a stupid question), which are the common applications used on cluster's systems? Web? Regards, Israel