It’s been an interesting day of contrasts in the world of storage, one that shows storage is a diverse and wide ranging segment of IT.
Tape has been part of the discussion on the twitterverse and despite everyone’s best attempts, is not dead yet. Tape and backup may not be seen as cool – but data protection is an essential requirement of sustainable data management and tape still provides the one of the most cost effective methods of data protection and of course archive. This has happened because tape continues to innovate. Tape drive speeds and media capacities continue to push upwards to meet demand, driving the effective cost per GB down and so keeping tape a player in the long term data retention market. Tape will be around for a long time to come.
Flash storage is all the rage and today Pure Storage announced they have finally gone GA with their all-flash storage arrays. They have also produced pretty funny video, taking a side swipe at traditional storage arrays using spinning disk.[youtube]http://www.youtube.com/watch?v=-lhKQrweaFw[/youtube]
Whilst this was a clever piece of marketing, it’s more useful to understand how this technology is implemented and why flash in a traditional array was only a stopgap. At the recent Storage Field Day, Pure Storage presented a technical deep dive of their architecture, explaining some of the thoughts that led to their second generation array – available from today. There was some pretty amazing detail presented, including a discussion on maintaining I/O latency when an SSD decides to falter. The Pure Storage array can choose to recreate the data from parity rather than wait for the I/O to complete and so maintain low latency. This is how solid state should be designed into storage arrays. Here are the videos from the Pure Storage presentation.[youtube]http://www.youtube.com/watch?v=t7HJjQIOe0s[/youtube] [youtube]http://www.youtube.com/watch?v=YHW0QHjOOtQ[/youtube] [youtube]http://www.youtube.com/watch?v=IXQBCgMiK1c[/youtube]
The Register carried two articles today discussing EMC VMAX, which is due for a refresh and expected to be announced at EMC World next week. The first talks about EMC scaling VMAX to 4PB of storage and/or 3,200 drives. This is a huge capacity to store in a single platform and represents a massive amount of information to keep in a single chassis. Symmetrix will probably go down as one of the most successful and pivotal storage arrays in history, however I think it is coming close to the end of it’s useful life because:
- flash will be the dominant technology for high performance applications
- bulk capacity can be done cheaper and easier
- vendors are building technology towers, not centralising storage in the way they did 10 years ago
- intelligence is being pushed up to the hypervisor
- 2.046: virtualizing hitachi math
- 4.005: you call that big storage?
- the storage anarchist: 0.002: storage virtualization: naming gone awry
- the storage anarchist: 0.036: data integrity and virtualized storage