Hi All,
For anyone interesting in monitoring Linux services, the latest Host sFlow
release can automatically track and monitor services running under systemd:
http://blog.sflow.com/2016/12/monitoring-linux-services.html
Ganglia already includes support for the sFlow metrics:
You could use a combination of Host sFlow and mod-sflow on your Apache
web servers:
http://www.sflow.net/
https://github.com/sflow/mod-sflow
The following article describes how to configure the head-end gmond:
http://blog.sflow.com/2011/12/using-ganglia-to-monitor-web-farms.html
mod-sflow also
Thu, Dec 31, 2015 at 12:05 PM, Peter Phaal <peter.ph...@gmail.com> wrote:
>>
>> You could use a combination of Host sFlow and mod-sflow on your Apache
>> web servers:
>> http://www.sflow.net/
>> https://github.com/sflow/mod-sflow
>>
>> The follow
sFlow reports on two types of data:
1. periodic export of counters
2. asynchronous export of randomly sampled packets and packet forwarding info
Ganglia's data model is well suited to handling counters exported by
the Host sFlow agent (http://sflow.net/), but does not provide support
for
Sergey,
gmond does not retransmit the sFlow metrics it receives. A single
gmond instance is used a central collector for a cluster of machines
running Host sFlow agents. gmetad uses a TCP connection to retrieve
the cluster stats from the single gmond instance and update the RRDs.
Peter
On Fri,
Have you enabled http in the sFlow section in the gmond config?
http://blog.sflow.com/2011/12/using-ganglia-to-monitor-web-farms.html
You should try running sflowtool on the head end gmond system to
verify that the data is arriving:
http://blog.sflow.com/2011/12/sflowtool.html
On Thu, May 28,
the design and
philosophy of ganglia and sflow. I will continue with nagios and
NSClient++.
** **
Steve.
** **
*From:* Peter Phaal [mailto:peter.ph...@gmail.com]
*Sent:* 04 September 2013 23:38
*To:* Burton, Steven
*Cc:* ganglia-general@lists.sourceforge.net
*Subject:* Re
Does Virtualbox support libvirt? If so, you can compile the Host sFlow
agent to link to the libvirt library to obtain VM statistics.
Otherwise, if there is a Virtualbox specific performance library that can
be used to retrieve metrics (Host sFlow uses libxenstat for Xen and WMI for
Hyper-V) then
on the draft so we can move to finalize the specification.
I would like to thank Peter Phaal for helping me with this contribution.
Thanks,
Ariel Almog
Mellanox Technologies
--
Everyone hates slow websites. So do we
Michael,
Ganglia doesn't understand the sampled HTTP transactions reported by
mod_sflow and there is no response report built into Ganglia.
To incorporate response time metrics based on the sFlow data, your
would need to piece together a script using the elements described in
the Ganglia book.
On the receiving end, have you configured gmond to listen for gmetric messages?
udp_recv_channel {
port = 8649
}
On the sending end (host-sflow), your gmetric settings must be
consistent with the hsflowd settings. The following message on the
host-sflow mailing list describes how to read the
Hi Mark,
If you want to significantly reduce the amount of UDP traffic going to
your head end gmond (cnode340), then you might want to consider using
Host sFlow agents to monitor machines in the cluster - sFlow encodes
all the core Ganglia metrics (along with additional disk IO, swap,
interrupt
On Fri, Oct 19, 2012 at 1:59 PM, Иван Евдокимов palmal.moz...@gmail.com wrote:
I'm trying to use sFlow(jmx-agent 0.6.1)-Ganglia(3.5.0, source build) pair
for jvm monitoring.
gmond.conf
udp_recv_channel {
port = 6343
}
sflow {
accept_vm_metrics = yes
}
When tcpdump port 6343 is fired, i
Hi All,
If you are running a GPU based compute cluster you might be interested
in the recently added support for GPU performance/health metrics.
http://blog.sflow.com/2012/10/using-ganglia-to-monitor-gpu-performance.html
Please try out the new extensions at let us know if there are any
issues
, Nicholas Satterly nfsatte...@gmail.com wrote:
Hi Peter,
Thanks for the feedback.
I've added a thread mutex to the hosts hash table as you suggested and will
send a pull request in the next day or so.
Regards,
Nick
On Mon, Sep 17, 2012 at 8:25 PM, Peter Phaal peter.ph...@gmail.com wrote
Nicholas,
It makes sense to multi-thread gmond, but looking at your patch, I
don't see any locking associated with the hosts hashtable. Isn't there
a possible race if new hosts/metrics are added to the hashtable by the
UDP thread at the same time the hashtable is being walked by the TCP
thread?
Martin,
If you can upgrade to the latest Ganglia release you could use sFlow
to monitor your Tomcat servers, the jxm-sflow-agent exports standard
JVM metrics, or the tomcat-sflow-valve can export the JVM metrics as
well as HTTP counters and transactions.
Douglas,
The sFlow standard includes a mechanism for periodically exporting
counters. It is these periodic counter exports that Ganglia is
processing - there is no equivalent mechanism in NetFlow. In addition,
sFlow standardizes export of counters from servers and applications -
it is these
The sFlow standard defines a wide range of metrics from switches,
servers and applications. Each device only exports the metrics that
are relevant to its normal operation, so switches will report network
metrics, servers will report cpu, memory, disk statistics and
applications will report
at 9:31 AM, Andreas Pflug
pgad...@pse-consulting.de wrote:
Well,
for examining the overall health of a cluster the network fabric appears
equally important to me...
There seems no OS software for this combined?
Regards
Andreas
Am 20.07.12 17:50, schrieb Peter Phaal:
The sFlow standard
to get stuff like switch CPU utilization. Is
this doable ?
Vladimir
On Fri, 20 Jul 2012, Peter Phaal wrote:
I agree, the performance of the network fabric is a critical component
of cluster performance and it would be great to figure out how to best
include the data in Ganglia.
A possible
-Original Message-
From: Bernard Li [mailto:bern...@vanhpc.org]
Sent: Thursday, July 12, 2012 10:49 AM
To: Nigel LEACH
Cc: lozgachev.i...@gmail.com; ganglia-general@lists.sourceforge.net; Peter
Phaal; Robert Alexander
Subject: Re: [Ganglia-general] Gmond Compilation on Cygwin
Hi Nigel
Nigel,
A simple option would be to use Host sFlow agents to export the core
metrics from your Windows servers and use gmetric to send add the GPU
metrics.
You could combine code from the python GPU module and gmetric
implementations to produce a self contained script for exporting GPU
metrics:
Hi All,
I have been experimenting with setting up Ganglia with sFlow agents to
monitor Hadoop. The configuration is described in the following
article:
http://blog.sflow.com/2012/04/hadoop.html
The Ganglia 3.3 release is required to report on the sFlow java metrics.
Peter
-construction.co.uk quoting the name of the sender.
Whilst every care has been taken to check this outgoing e-mail for viruses it
is seen as your responsibility to check and sweep it, and any attachments,
for viruses on receipt.
-Original Message-
From: Peter Phaal [mailto:peter.ph
Can you verify that you are receiving performance metrics using the
following command on your gmond server?
tcpdump -p -s 0 -w - udp port 6343 | sflowtool
The firewall on your windows server, every firewall in the path to the
bsd collector, and the firewall on the bsd collector itself must be
On Mon, Feb 20, 2012 at 9:06 AM, Mohit Dhingra mohitdhing...@gmail.com wrote:
Hi Vladimir / All,
Everything is working fine now (gmond and gmetad), I have installed ganglia
on Dom0 OpenSUSE, with Xen as hypervisor. Now, I want to monitor VMs with
the help of sflow, as you told earlier.
I
Bryan,
Since you want each of the nodes in the cluster to have access to the state its
peers, implementing a full gmond equivalent peer sounds like the right call.
However, I think that you might want to consider adding sFlow export
functionality as well. It's helpful to have a clear
The following articles describe the sFlow metrics included in the Ganglia 3.3.0
and 3.2.0 releases:
http://blog.sflow.com/2012/02/ganglia-33-released.html
http://blog.sflow.com/2011/07/ganglia-32-released.html
The Host sFlow agent efficiently exports standard Ganglia host metrics from
Windows,
Anyone curious about the sFlow functionality in Ganglia 3.2 should
take a look at Dave Mangot's blog - he describes why Tagged.com is
using Ganglia with sFlow.
http://tech.mangot.com/roller/dave/entry/host_based_sflow_a_drop
Peter
On Wed, Jul 13, 2011 at 6:43 PM, Vladimir Vuksan vl...@vuksan.com wrote:
Great. Would be possible to get a comprehensive guide on all the
configuration options for sFlow stuff :-).
There are very few configuration settings. Just the udp_port and the
accept_vm_metrics settings, both are shown in
On Tue, Jul 12, 2011 at 6:43 AM, Vladimir Vuksan vli...@veus.hr wrote:
That's relatively easy to fix. In Gweb 2.1.0+ any metrics that don't exist
show up as empty graphs with a legend that says No matching metrics found.
We can certainly fix any other ones. We shouldn't let UI get in the way of
rather than potentially needing to update many host-sflow agent machines.
Thanks,
Robert
On Thu, Jul 7, 2011 at 11:26 PM, Peter Phaal peter.ph...@gmail.com wrote:
Great news! For additional information on the sFlow feature and
updated configuration instructions, see:
http://blog.sflow.com
On Mon, Jul 11, 2011 at 1:09 PM, Vladimir Vuksan vli...@veus.hr wrote:
Peter,
It is also my understanding that currently only metrics from physical hosts
are supported. Is it possible to add network devices that support sFlow ?
Thanks,
Vladimir
Currently the Ganglia UI is host oriented,
Great news! For additional information on the sFlow feature and
updated configuration instructions, see:
http://blog.sflow.com/2011/07/ganglia-32-released.html
On Thu, Jul 7, 2011 at 7:20 PM, Vladimir Vuksan vli...@veus.hr wrote:
-- Forwarded message --
We are happy to announce
Hi All,
I have been experimenting with Ganglia for monitoring performance in
the Rackspace cloud and it works very well:
http://blog.sflow.com/2011/01/rackspace-cloudservers.html
A big advantage of the gmond/sFlow data push model is that Ganglia
automatically discovers cloud servers as they are
of sFlow i used this
http://bugzilla.ganglia.info/cgi-bin/bugzilla/show_bug.cgi?id=276
What can i do?
thanks a lot
Giovanni
*From:* Peter Phaal peter.ph...@gmail.com
*Sent:* Tuesday, December 07, 2010 6:34 PM
*To:* Giovanni De Rosa giode...@hotmail.it
*Cc:* ganglia-general
/show_bug.cgi?id=276
What can i do?
thanks a lot
Giovanni
From: Peter Phaal
Sent: Tuesday, December 07, 2010 6:34 PM
To: Giovanni De Rosa
Cc: ganglia-general@lists.sourceforge.net
Subject: Re: [Ganglia-general] Ganglia and sFlow
The following article
The following article provides additional information on configuring the
Ganglia development branch (trunk) to collect sFlow:
http://blog.sflow.com/2010/10/ganglia.html
Installing and configuring Host sFlow agents to send sFlow from Linux and
Windows platforms is described in the articles:
Hello All,
Here is some background on the sFlow support that has been added to gmond
in the development branch:
http://blog.sflow.com/2010/10/ganglia.html
An sFlow agent is extremely lightweight, since sFlow monitoring is
typically used in embedded environments where resources are
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