I have a fairly high disk i/o intensive email server I am thinking of upgrading. I was thinking of upgrading it to CentOS 5.x 64bit. I was also thinking of running it as a guest under XEN. Would this allow me to more easilly transfer it to faster hardware in the future? Or would running as a guest seriously hurt disk i/o?
Quoting Matt <lm7812 at gmail.com>:> I have a fairly high disk i/o intensive email server I am thinking of > upgrading. I was thinking of upgrading it to CentOS 5.x 64bit. I was > also thinking of running it as a guest under XEN. Would this allow me > to more easilly transfer it to faster hardware in the future? Or > would running as a guest seriously hurt disk i/o?I'm running a web and mail server in a guest xen domain with a raid 10 setup and have no disk i/o issues. I think you haven't supplied enough info for a complete answer, though. How much traffic, how much RAM, what disk(s) size and config will make a difference. Dave> _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos >-- "It is no measure of health to be well adjusted to a profoundly sick society." Krishnamurti
>Would this allow me >to more easilly transfer it to faster hardware in the future?Sure.>Or would running as a guest seriously hurt disk i/o?Depends on what you use for IO :) It's not impossible to replace the physical iron with a virtualized iron and config that's faster. What do you have available, 10g eth for example? That will dictate the likely success. I had a few platforms exporting lvm backed block devices (and iscsi once) and the differences between a non BBUWC LSI card on sata's compared to an HP P800 no SAS was like 10:1, and a P800 is by no means a screamer but it moves an exchange server, sql, and a few other vm's along fast. You might also compose the raid array appropriately for best results. Search here or the iet list for Ross Walkers suggestions, I have used his advice with good success. jlc