Help configuring cold cache warm up and replication

[m8051]

Hi all,

We recently had an outage in our datacenter that caused issues to one of our mecached nodes and we would like to add/increase the capacity of our nodes to make the system more resilient.

As far as I understood, the cold cache warm up would do what we need, and I am wondering if anyone has any experience setting mcrouter to achieve cold cache warm up and replication at the same time.

This is what I have been testing in my local environment:

CMD

/usr/bin/mcrouter --num-proxies=2 --log-path=/var/log/mcrouter/mcrouter.log --port=50000 --config-file=/etc/mcrouter/mcrouter.json

MCROUTER.JSON

{
  "pools": {
    "cold": { "servers": [ "10.10.10.245:50002", "10.10.10.245:50003", "10.10.10.245:50004" ] },
    "warm": { "servers": [ "10.10.10.50:50001" ] }
  },
  "route": {
    "type": "OperationSelectorRoute",
      "operation_policies": {
        "add": {
          "type": "AllSyncRoute",
          "children": ["Pool|cold", "Pool|warm"]
        },
        "set": {
          "type": "AllSyncRoute",
           "children": ["Pool|cold", "Pool|warm"]
        },
        "delete": {
          "type": "AllSyncRoute",
          "children": ["Pool|cold", "Pool|warm"]
        },
        "replace": {
          "type": "AllSyncRoute",
          "children": ["Pool|cold", "Pool|warm"]
        },
        "get": {
          "type": "WarmUpRoute",
          "cold": {
            "type": "OperationSelectorRoute",
            "operation_policies": {
              "get": "LatestRoute|Pool|cold",
              "set": "AllSyncRoute|Pool|cold"
            },
            "default_policy": "AllSyncRoute|Pool|cold"
          },
          "warm": "PoolRoute|warm"
        }
      }
  }
}

Thanks in advance.

[Happytreat]

Hey @m8051, could you explain what the ideal state you want to achieve with this configuration?

On a side note too, here is a past issue that may be relevant to you: #111