EVE Online server was heading for a move and a bit of an upgrade. Hidden within a few cabinets in a single datacenter is everything that makes up the EVE universe, from characters and ships to planets and the market. The cluster of hardware has been expanded over the years and now exceeds the limitations of the hardware cabinets it occupies. Moving the cluster to a new location within the datacenter should help support future upgrades to keep up with the game's growing subscriber-base.
The shuffle began early yesterday morning at 09:00 UTC and was planned to be completed by 15:00 UTC the same day. Unfortunately, the transition to a new locale has had some unforeseen side-effects for Tranquility. After a long day of server work, final testing of the cluster revealed database issues that must be corrected before the game can go live. At 03:00 UTC this morning, the estimate for restoring Tranquility and the EVE website was mid-day today. With that time having now passed, CCP has released a new estimate of 16:00 UTC. If necessary, further delays will be announced on the official EVE Facebook page, the CCP Games Twitter page and the game's main website.
UPDATE: The server is now up and players can log in again. CCP has explained the reasons behind the long downtime and detailed their plans to reimburse players with skillpoints in a news post.