Feeds

SNIA specifies SSD performance test

Fresh out of the box plus steady state

Security for virtualized datacentres

The SNIA has devised a test spec for solid state drives that tests both their initial state and their later sustained performance. Will the SSD manufacturers use it and reveal their performance drop-off?

When SSDs are first bought and fresh out of the box (FOB), their performance is much higher as there is no need for write-erase cycles that slow performance down. Quoted performance numbers based on the FOB state generally bear little resemblance to steady state numbers once the initial state is history. Steady state write IOPS can be less than half the FOB numbers.

The SNIA's performance test specification (PTS) takes this into account. The test sequence puts the SSD into a near-FOB condition by erasing data. Then pre-conditioning takes place with data being written to the SSD to facilitate reaching a steady state. A test loop is run until the SSD is in a steady state and then measurements are taken.

The SNIA points out that "only when devices are tested on identical hardware platforms and using the same software tools [and in their steady state] can their performance be fairly compared".

Its PTS has two specifications; one for enterprise solid state drives and one for client SSDs. The test methodologies are similar but the settings vary. The enterprise PTS will be released this month, with the client PTS due in the third quarter of this year.

The SNIA's solid state storage initiative had the involvement of 27 SNIA member companies. Its technical work group has involvement from 40 companies. That should ensure that the majority of SSD vendors issue both FOB and steady state numbers in accordance with the PTS.

A working assumption might be that SSD vendors who don't issue steady state PTS numbers have lousy ones. We hope that all the SSD vendors do use the SNIA's PTS; it will be a mark of responsibility. ®

Security for virtualized datacentres

More from The Register

next story
Just don't blame Bono! Apple iTunes music sales PLUMMET
Cupertino revenue hit by cheapo downloads, says report
The DRUGSTORES DON'T WORK, CVS makes IT WORSE ... for Apple Pay
Goog Wallet apparently also spurned in NFC lockdown
Cray-cray Met Office spaffs £97m on VERY AVERAGE HPC box
Only 250th most powerful in the world? Bring back Michael Fish
Microsoft brings the CLOUD that GOES ON FOREVER
Sky's the limit with unrestricted space in the cloud
'ANYTHING BUT STABLE' Netflix suffers BIG Europe-wide outage
Friday night LIVE? Nope. The only thing streaming are tears down my face
IBM, backing away from hardware? NEVER!
Don't be so sure, so-surers
Google roolz! Nest buys Revolv, KILLS new sales of home hub
Take my temperature, I'm feeling a little bit dizzy
prev story

Whitepapers

Why and how to choose the right cloud vendor
The benefits of cloud-based storage in your processes. Eliminate onsite, disk-based backup and archiving in favor of cloud-based data protection.
Forging a new future with identity relationship management
Learn about ForgeRock's next generation IRM platform and how it is designed to empower CEOS's and enterprises to engage with consumers.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
Storage capacity and performance optimization at Mizuno USA
Mizuno USA turn to Tegile storage technology to solve both their SAN and backup issues.
Simplify SSL certificate management across the enterprise
Simple steps to take control of SSL across the enterprise, and recommendations for a management platform for full visibility and single-point of control for these Certificates.