Thursday, October 23, 2008

Whitepaper from Arista on 10 GigE penetration in SANs

Arista Networks released a joint whitepaper with Intel on 10 GigE performance technologies and penetration of 10 Gig Ethernet into SANs using the iSCSI protocol. The whitepaper is available here. The whitepaper discusses a bunch of Intel technologies for 10 GigE such as I/O Acceleration Technology (IOAT) and Virtual Machine Data Queues (VMDq). Also mentioned is how iSCSI is helping 10 GigE replace Fiber Channels in SANs.

Arista Networks also has a new CEO today, Jayshree Ullal, a high-profile Cisco senior VP. Also joining is Andy Bechtolsheim as Chief Development Officer. Andy is one of the founders of Sun Microsystems, which he re-joined in 2003 on the acquisition of Kealia. Arista vision is to enter the cloud computing market in which multiple services and applications are deployed in a central network and may be easily availed from multiple devices and end-points.

Sunday, October 19, 2008

Neterion's whitepaper on IO QoS

Neterion has an excellent whitepaper on IOQoS, a technology that enables multiple virtual channels to have independent QoS parameters while sharing the same Neterion 1- GigE adapter. OpenSolaris has a similar project, Crossbow which lets virtual streams have independent QoS parameters while sharing the same 10 GigE interface.

Encryption at the speed of 100 Gbps

According to a Lightreading report, Telcordia is trying to bring optical security at 100 Gbps using Photonic Layer Security (PLS). PLS changes an optical signals' phase by different amounts at different points, and then applying a similar iteration on a combined optical signal.

That mixes things up, but the number of phase changes involved is small enough to be cracked by trying enough possible permutations. (There's a limit to the number of usable codes that can be applied to that step.) So, PLS calls for multiple signals to get combined, with a second encoding iteration done on the aggregated stream, again using phase shifts. The decoding can be done only with the PLS key.

For details on PLS, please refer to the Journal of Optical Networking (JON) article available here.