Dell Compellent is targeted to medium-sized to large organizations, while Dell’s line of iSCSI-only EqualLogic arrays typically targets small- to medium-sized businesses.
Compellent’s list price is $130,000 with six SLC SSDs and six MLC SSDs, and Dell claims the Compellent all-flash arrays are priced from $5 per gigabyte to $10 per GB with 48 SLC SSDs and 240 MLC SSDs.
Like Compellent, EqualLogic launched its first all-SSD-capable model in 2009. But the December PS6210S release takes advantage of controller and firmware technology redesigned specifically with flash in mind. The end result is a performance claim by Dell of 1.2 million IOPS in a configuration with a virtual pool of eight all-flash arrays.
The PS6210S all-flash EqualLogic array supports only the high-performance but more expensive SLC flash, as the industry increasingly moves to cheaper MLC technology. Dell supplied a starting price of $8 per GB for the PS6210S, based on a configuration with two dozen 800-GB SSDs, placing it roughly in the middle of the pack of the lines of all-flash arrays.
The most aggressive all-flash array vendors claim their prices are less than $5 per GB, but those products often employ data reduction technology to hit those numbers. Neither the all-flash EqualLogic arrays nor Compellent arrays support inline deduplication and compression, two of the most important storage-saving features. They support only post-process deduplication for file data within a unified storage system via the Dell Fluid File System, and Compellent this month added support for post-process compression, according to a Dell spokesperson.
Dell’s EqualLogic division has credited the PS6210S array’s redesigned controller and software for allowing it to stake a claim of flash performance at the price of disk. The company declined to supply an estimated price per IOPS.