commentary Dell's announcement last week about its future enterprise strategy was a preview of what's ahead for the entire server industry. At the tony Pierre Hotel on Manhattan's Upper East Side, Dell unveiled, among other things, the company's new blade server.
According to IDC, blade servers won't take off until at least next year. But make no mistake--blade servers are the servers of the future. Each blade is a single, 5 ¼-inch-high (3U) self-contained computer--motherboard, processor, memory, disk, and connectivity--that screws into a slot on a standard 19-inch rack. All the blades share a single (or more commonly, dual redundant) power supply, fans, and backbone.
Dell will offer its blade server, dubbed the PowerEdge 1655MC,
in two configurations when it ships, expectedly in the third quarter of this
year. In a high-density configuration, Dell will pack as many as 504 processors
(two per blade) in a single rack.
Dell expects a second configuration, designed for higher performance, to be
more popular. Each blade in the high-performance configuration is three times as
wide as the high-density blades, so you can pack "only" 84 blades into one rack.
That's still six servers in the space where only three could fit previously.
The high-performance system uses a switched Gigabit Ethernet backplane,
compared to a 10/100 backplane for the high-density system, and two SCSI drives
of any type instead of two ultra-low-profile 40GB IDE drives. Blades in both
configurations offer dual redundant connections to the Ethernet backplane. All
the hardware is standard, non-proprietary equipment, per Dell's practice,
including 1.26GHz Pentium III processors, up to 2GB of SDRAM, and an Ultra320
Blade servers have some key advantages over traditional box servers and even
over rack-mounted servers. They're compact--you can put more of them in the same
space. They use less power than an equivalent number of standalone servers.
Now one announcement of a product that isn't even shipping yet doesn't smack
of a trend, nor do HP and Compaq's blade server
announcements make this a trend--though Sun and
should be next. But if you look at where the industry has been, it becomes clear
where it's going.
Blade servers continue an increasing trend toward consolidating computing
resources back into the data center. In the pre-PC days, all computing was done
in huge air-conditioned computer rooms with impressive picture windows where
operators could be seen scurrying from console to console. The PC proliferation
shattered the glass houses, and in many organizations, workgroup and
departmental servers gained places near the desktops they served.
Recently, however, the need for better system management and curbed costs
have pushed computer resources back into a central area. Low-profile rack
servers, which stack machines vertically, have become more popular than
standalone boxes, because they take up less space and are easy to service.
Blades further "stack" servers horizontally, to get the highest server density
possible. (At least today--maybe in a few years they'll be stacking them in a
third dimension, back to front.)
You probably won't buy your first blade server this year. But if IDC's
predictions are on track, you'll want to consider blade servers next year when
you add new machines or replace existing ones.