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The data center bridging extensions ensure that packets won't get lost due to congestion or flow control. They were created in part because fibre channel over
by bcrl 5y ago
The data center bridging extensions ensure that packets won't get lost due to congestion or flow control. They were created in part because fibre channel over ethernet couldn't handle any packet loss in the fabric.
- wmf 5y agoRunning lossless with no congestion control leads to high tail latency though.
- bcrl 5y agoQuite true. However, in the case of FCoE, given the performance issues with the Fibre Channel SANs I worked on a few years ago, tail latency in the fabric was the least of the concerns we ran into. Customers would wonder why their persistent messaging rates tanked when the system started pushing messages to disk. Meanwhile their SAN can't even sustain 100MB/s of sequential writes.