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Changes in storage technology and the way it is priced are required before the cloud can be ready for primary storage, according to a panel of storage vendors presenting at the GigaOM conference.
The panelists, including executives from NetApp and three startups, agreed that the cloud for now is more suited for backup and recovery, but that a number of new companies doing well in specific areas of cloud storage offer clues about business models that could help pave the way for more primary storage in the cloud.
Vanessa Alvarez, an analyst at Forrester Research who moderated the panel, said that the good news about cloud storage is that customer interest is increasing. About 28 percent of respondents in a Forrester survey said in 2010 that they are interested in cloud storage, up from 18 percent the year before.
The bad news, Alvarez said, is that those respondents are only looking at backup and recovery on the cloud, and not at primary storage.
Andres Rodriguez, founder and CEO, of Nasuni, a Natick, Mass.-based developer of virtual appliances for backing up and archiving files to third-party clouds, said that it is important for the storage and compute layers to be close together.
For now, concerns about performance and security among customers are holding back customer investments in primary cloud storage, Rodriguez said. As a result, he said, it is better for many customers to move the cloud into the data center rather than move the data center into the cloud.
IT departments are still reluctant to move primary storage to the cloud, said Val Bercovici, senior director in the Office of the CTO at NetApp.
However, Bercovici said, moving backup data to the cloud offers a chance for IT departments to add value to such data while cutting the costs of storing it. "Backups and business continuity are easy stepping stones to the cloud," he said.
One problem with running primary data in the cloud is the issue of how applications work, said Dheeraj Pandey, CEO of Nutanix, a San Jose, Calif.-based startup developer of technology for virtualizing both compute and storage resources together. Nutanix is planning on coming out of stealth mode at the VMworld conference late next month.
It is very difficult to run applications like Exchange or SharePoint in the cloud because of the problem of accessing the necessary metadata, Pandey said. "If metadata is sitting in the cloud, 200msec access is too slow," he said.
Dave Wright, CEO of SolidFire, a Boulder, Colo. startup developer of SSD-based primary storage systems for cloud computing which just came out of stealth mode this week, said that breaking the tie between physical servers and their storage does not work because of the physics related to data access speed.
There are millions of virtual servers running in clouds, all with their own storage, but still without the performance needed to run applications like SharePoint and Exchange in the cloud, Wright said.
The industry needs to get away from thinking in traditional storage terms like block and file and move on to new storage technologies that have an awareness of cloud topologies, Bercovici said.
He said that no one is running Oracle in a cloud, but they are running primary applications from companies such as Box.net, a provider of cloud-based file sharing and management, that have developed models that are specific to providing storage in the cloud.
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