[Lustre-discuss] LMT 2.6.0

[Jim Garlick]

Hi Chris,

I think Herb is reporting for jury duty today so I'll speak up and let him
follow up later if I missed anything.

There are text clients (ltop and lstat).  I haven't tried running
the GUI remotely and tunneling the X session, or running the client
locally and tunneling mysql protocol, but I don't know of anything 
architectural that would prevent either from working.

We'll get some screenshots out there.  Herb was reticent to publish
LMT without good documentation, but I encouraged him because there were
a couple of people anxious to try it out.  So the lack of screenshots/
documentation is my bad - we'll try to fix that as time permits.

Regarding the dependencies: it's always a tradeoff between reinventing the
wheel and adding dependencies.  Sigh.  In this case, we leveraged MySQL for 
the database of historical data; we managed to get a graphics group here 
which is a Java shop to code the clients, so they interface directly to 
MySQL using the Java MySQL bindings; and we leveraged the Cerebro multicast 
based monitoring tool for the data collection because it introduced no
new dependencies on lustre servers at our site (since we already use it
to monitor other things), and is very lightweight.  

I think this is a good architecture: the clients and data collection 
parts are independent with interfaces defined by the database schema, 
so they could be independently replaced, for example if someone wanted to 
write text clients in C/curses/MySQL, or replace the backend with some 
other data collection infrastructure that they are already using or feel
is superior.

Jim

On Wed, Apr 09, 2008 at 08:47:39AM -0600, Chris Worley wrote:
> Are there any screenshots/FAQs?
> 
> I looked at the package, and the depandancy list is long.
> 
> As most of my work is remote, does the GUI run remotely over an SSH tunnel?
> 
> Are there any similar console/text-based utilities w/ a shorter
> dependency list and lighter weight for remote access?
> 
> Thanks,
> 
> Chris
> On Mon, Apr 7, 2008 at 5:54 PM, Herb Wartens <wartens2 at llnl.gov> wrote:
> > -----BEGIN PGP SIGNED MESSAGE-----
> >  Hash: SHA512
> >
> >
> >  Hi All,
> >  We have a new and improved version of LMT released
> >  on Sourceforge.  For those who have never used it, LMT is the Lustre
> >  Monitoring Tool developed at LLNL.  It provides realtime monitoring of a
> >  Lustre filesystem (or multiple filesystems).  It also graphs data over time
> >  for a set of attributes specified by the user.  Please feel free to try it
> >  out.
> >
> >  Below are the release notes.
> >  (please forgive this if it is a repost as it looks like lustre-discuss
> >  may have finally come back up)
> >
> >
> >  http://sourceforge.net/projects/lmt
> >
> >  ========================================================================
> >  Release Notes for LMT 2.6.0                                  07 Apr 2008
> >  ========================================================================
> >
> >  * This version of LMT 2 has been tested to work properly with Lustre 1.6.x
> >   It is no longer necessary to keep the old lustre *.xml configuration and
> >   there are no more xwatch-lustre.conf or lmt.conf files to set up.
> >
> >  * LMT now uses Cerebro to transport the data collected from the Lustre
> >   filesystem being monitored. For more info see:
> >   http://sourceforge.net/projects/cerebro
> >
> >  * Building the rpms requires ibm-java since this is what we use in Chaos 4.
> >   This can be changed in the specfile to require Sun Java if that is
> >   preferred (the main issue is that we need a full fledged JVM that
> >   supports swing).
> >
> >  * There is now a dependency on mysql to store the collected data. Since the
> >   resolution of the collection is ~5 seconds this can quickly consume a lot
> >   of space.  The clients and servers are completely decoupled.
> >
> >  * Please refer to the documentation for instructions on how to install and
> >   configure LMT 2.
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> >
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