Rather than recommending a large expensive server for high volume caching we sometimes recommend a cache array. This is a stack of Cache servers such as the OP1400 working in tandem and spreading the load. Our software handles unlimited array sizes and distributes the load equally amongst them. This gives very high performance levels and redundancy because if one breaks we simply mark it down and carry on. It also provides cost effectiveness and flexibility because you only need to add inexpensive servers as required by your load growth as and when it occurs.