Hello All,
I checked changes into the trunk to update the sFlow module to accept VM,
JavaVM, HTTP and Memcache metrics.
The metrics are all collated under the physical host, using a
metric-name-prefix to separate multiple instances (a departure from the way we
did it before). In the case of hosted VMs, the prefix is always the VM name,
so if you run hsflowd on a XenServer then below the hypervisor metrics you will
see the VM metrics appear like this:
Domain-0 : CPU Utilization
Vyatta: CPU Utilization
xenvm2: CPU Utilization
...
For HTTP, Memcache and JavaVM the prefix is off by default, so if you run
mod-sflow you will see:
HTTP Method GET
HTTP Method POST
...
But if you have multiple instances, and your gmond.conf file has this:
udp_recv_channel {
port = 6343
}
sflow {
multiple_http_instances = yes
multiple_memcache_instances = yes
multiple_jvm_instances = yes
}
Then the prefix will be the service port that each daemon is listening on. For
example:
80: HTTP Method GET
80: HTTP Method POST
...
8082: HTTP Method GET
8082: HTTP Method POST
or:
11211: Memcache Get Hits
11211: Memcache Get Misses
...
11212: Memcache Get Hits
11212: Memcache Get Misses
For JavaVMs the sFlow agent often supplies a node-name, so those metrics will
use that as the prefix:
jvm1: JVM GC mS
jvm1: JVM Heap Used
....
jvm2: JVM GC mS
jvm2: JVM Heap Used
....
The best place to go for open-source agents is:
http://host-sflow.sourceforge.net/relatedlinks.php
Where there are links to agents for Apache, NGINX, tomcat, node.js, memcached
and Java (and of course hsflowd for Linux, FreeBSD and Windows).
The sFlow specs are published on sflow.org:
http://sflow.org/developers/specifications.php
Please test and let me know how it goes.
Neil
------------------------------------------------------------------------------
Write once. Port to many.
Get the SDK and tools to simplify cross-platform app development. Create
new or port existing apps to sell to consumers worldwide. Explore the
Intel AppUpSM program developer opportunity. appdeveloper.intel.com/join
http://p.sf.net/sfu/intel-appdev
_______________________________________________
Ganglia-developers mailing list
Ganglia-developers@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/ganglia-developers
