The production lifetime of a whole bunch of TIG hardware has passed, and we've started ordering replacement machines. Our storage room is currently overflowing with new systems that nobody has had time to unbox yet. We've got something like 8 terabytes of new AFS storage space, some new mail infrastructure hardware, and some new hardware to host Xen virutal machines. We'll probably be getting more before too long.
I'm really excited about finally replacing the IMAP server and really taking the time to tune and optimize the new system. Filesystem access on the current server is painfully slow at this point. The new system has much faster disks, and, having seen how bad things are with the current system, will get a lot more tuning before being deployed. The IMAP server's workload is particularly difficult to handle, because it involves lots of small files (one per message) with lots of random seeking. Disks seeks are expensive, so any optimization we can do there will help a whole lot. I'm not sure when this system will go online, but hopefully within the next couple of weeks.
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