Andrew Zonenberg

@[email protected]
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Security and open source at the hardware/software interface. Embedded sec @ IOActive. Lead dev of ngscopeclient/libscopehal. GHz probe designer. Open source networking hardware. "So others may live"

Toots searchable on tootfinder.

ngscopeclienthttps://www.ngscopeclient.org/
Bloghttps://serd.es
LocationSeattle area
GitHubhttps://github.com/azonenberg
Andrew Zonenberg6h ago

Has anyone done a test implementation of https://www.ietf.org/archive/id/draft-meow-mrrp-00.html yet? Is there any open example code?

I'm wondering how many Kbity of flash space I might need

Meow

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Show threadAndrew Zonenberg10h ago

Oh wait, I forgot to check with multiple streams (more realistic for how Ceph works).

With 8 streams I get 37.6 Gbps from me to the node, and 37.3 the other way around. Much better performance.

Andrew Zonenberg10h ago

Investigating the Ceph / 40G stuff a bit more.

Iperf3 from my workstation to cluster node 3 (the first one I put the connectx in) gets 24.7 Gbps with 13.7K retries with workstation sending to the node, and only 13.5 with 57948 in the reverse direction.

I'm beginning to wonder if PCIe bandwidth is part of the issue.

Andrew Zonenberg11h ago

57.4 kWh today, a new record by a massive margin. Exported 12.1 of that because I was generating 10.9 kW at peak while burning closer to 5.

Tomorrow is looking to be a nice day and I'm also gonna be hopping up on the roof to wipe some of the pollen off the array which should buy me a few percent more generation as well, so we'll see how much I end up getting then.

Andrew Zonenberg11h ago

Put a second 40g nic in the cluster and performance went *down*. Not sure if due to bad load balancing or if I have hardware issues of some sort.

Gonna run some iperf checks so I can validate the network independently of Ceph.

Andrew Zonenberg13h ago
What if werewolves were just medieval furries
Show threadAndrew Zonenberg20h ago

Neither of these were ever created IRL.

We did, however, make an equally disgusting concoction called "peepornia" or "peeparnia" (pronunciation varied and it was never written down to my knowledge) several times.

It was basically a witch's brew, mixed in a toilet and periodically flushed when it got too full, created any time we did a cleanout of the back of the fridge or pantry and needed to dispose of the contents of cans, jars, and bottles that were no longer fit to eat before washing and recycling the containers.

Show threadAndrew Zonenberg20h ago
This was around the same time we decided that a mixture of maple syrup and molten lead was called "tupa", as in "tupa scent milk"
Andrew Zonenberg20h ago
Randomly reminded of the time that me and my brothers decided that a hypothetical mixture of Coca-Cola and toilet paper (which as far as I know was never actually created) needed a name, and dubbed it "garblax".
Show threadAndrew Zonenberg1d ago
And the temperature data (sorry freedom units but that's what the local station uses) shows a slow rise through the day followed by a very sharp drop as the front rolls through