Conversely, as access to data sitting on SSDs begins to wind down, and the frequency of access declines, these new data-management solutions will move the data back to slower performance spinning disks such as Fibre Channel or SATA drives. It's not to much of a stretch to anticipate storage vendors or smart back-up and archive software vendors jumping on the sub-LUN data-management bandwagon and developing software that leverages API's to have the storage array manage data from highly accessed SSDs to slower Fibre Channel or SATA disk drives and then right on out of the storage array to an archival platform - or out to the Cloud for re-purposing or long-term retention.
As mentioned previously, the IBM Easy Tier solutions manages data Extents on volumes. These monitored extents form a virtualized Extent environment, and the extents are RAID-protected and are moved either automatically or manually between SSD and spinning disks based on frequency of access. Figure 1 is a simple illustration of the IBM technique.
We at Analytico have started tracking storage vendors as they make public comments about their sub-LUN data management capabilities, or future offerings. From our perspective, it is easier to track the vendors and their offerings in table format. The vendors we are currently tracking include Compellent, 3Par, IBM, EMC, Hewlett Packard (HP) NetApp, and Hitachi Data Systems (HDS). We provide information in Table 1 as a sample containing the kinds of specific vendor information we are tracking. Please feel free to comment on this blog and suggest additional areas you would like to see tracked.
Other Related Disk Storage Announcements by IBM
IBM Storage Tier Advisory Tool Monitor and Measurement offer analytics for use with IBM Easy Tier on the DS8700. IBM XIV Storage System adds support for higher density, 2TB, SATA disks for near-line storage capacity increases, and some times offline via "spin down" CLI command support. This is a natural storage capacity addition for the XIV. It also includes new, low-voltage, components in its green initiatives discussions and improving the power consumption of the box is a step in the right direction. Remote mirror of snapshots provide users with the ability to execute a snapshot copy at the remote site and is a big step forward in supporting consistent splits in support of consistency groups in high availability XIV installations.
All of the major storage vendors will include FCoE support within their arrays throughout 2010 and early 2011. If uncertain, users should ask their storage vendors what the FCoE support time-line looks like. Overall, most agree that few will deploy FCoE connectivity in 2010. However, there will be greater adoption in 2011 as sever vendors begin to ship Converged Network Adapters (CNAs) and LAN On Motherboard (LOM). Also, the industry believes that full-scale adoption and deployment will be in full swing during 2012. IBM is correct to deploy FCoE on XIV now in preparation for future user demands.
I was fortunate to be able to attend the IBM Storage Symposium in Boston in October 2009. At that symposium IBM was clear in their intent to keep a positive momentum going with the IBM System Storage products. IBM vowed to continue to innovate and to provide sub-LUN level data management and movement within its products. With its strong background in data set (sub volume) management in the mainframe space, it seemed only a natural that IBM would be able to build a sub-LUN data management capability for its open connectivity side of the business on the DS8700.