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Jianshen Liu

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Ceph peering state machine

November 16, 2020November 24, 2020
Posted by jianshenliu
Ceph provides a script to generate a graph for the peering state machine, which is super helpful to study the state transitions of placement groups. To generate the graph, here are the commands: This is the latest SVG file I generated from the source as of this writing: There would be a lot to learn
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Development

Query vendor with the PCI device vendor ID

November 4, 2020November 4, 2020
Posted by jianshenliu
In Linux, each PCI device is associated with a 2-byte vendor ID. Here is an example: To decode the ID to be the name of the vendor, we need mapping information between the ID and the name. lspci uses the PCI ID repository that can be downloaded/browered from http://pci-ids.ucw.cz/. We can use strace to evidence
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Blog

Initial Commit

October 13, 2020November 5, 2020
Posted by jianshenliu
This is a placeholder to remember (and announce) my first day of
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Latest News

  • New Funding from Sandia National Laboratories
    October 13, 2020
  • Ph.D. Advancement
    June 25, 2020

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