MCAS_server_config_files.md

MCAS Server Configuration

The MCAS server process launch requires a configuration file parameter. For example:

./mcas --conf ./myConfig.conf --debug 0

Example MCA configuration file:

{
    "shards" :
    [
        {
            "core" : 0,
            "port" : 11911,
            "net"  : "mlx5_0",
            "default_backend" : "hstore",
            "default_ado_path" : "/opt/mcas/build/dist/bin/ado",
            "default_ado_plugin" : "libcomponent-adoplugin-graph.so"
            "dax_config" : [{ "region_id": 0, "path": "/dev/dax0.0", "addr": "0x9000000000" }]
        }
    ],
    "net_providers" : "verbs",
    "resources":
    {
            "ado_cores":"6-8",
            "ado_manager_core": 1
    }
}

Item	Subitem	Description	Example
shards	core	Core number (counting from 0) to bind to	0
	port	TCP/IP port to listen on (includes RDMA bootstrap). Should be unique for each shard.	11911
	net	Network device	"mlx5_0", "mlx5_1", "eth0"
	default_backend	Backend key-value engine component	"hstore", "mapstore"
(ADO only)	default_ado_path	Path for ADO plugin components	"/install_dir/bin/ado"
(ADO only)	default_ado_plugin	Name of default plugin	"libcomponent-adoplugin-graph.so"
(hstore only)	dax_config	DAX region assignment
dax_config	region_id	Unique region identifier	0
	path	Device DAX path	"/dev/dax0.0", "/dev/dax1.9"
	addr	Virtual address space to map to	"0x900000000"
net_providers	-	Network provider (libfabric)	"verbs", "sockets"
resources	ado_cores	Cores to allocate for ADO process	"3-4"
	ado_manager_core	Core for ADO management thread	2