[vdsm] Help Needed

[Darshan Narayana Murthy]

----- Original Message -----
From: "Dan Kenigsberg" <danken at redhat.com>
To: "Darshan Narayana Murthy" <dnarayan at redhat.com>
Sent: Monday, April 7, 2014 4:53:30 PM
Subject: Re: Help Needed

Hi Dan,
I sent a patch for vdsm to get the gluster volume capacity
statistics using libgf api ( patch : http://gerrit.ovirt.org/#/c/26343 ),
This patch requires glusterfs-devel package for build.
It looks like jenkins does not have this package and so the build
for this patch is failing. Does jenkins automatically pull the required
package or is there anything to be done to get this package in jenkins ?.
Can you please help me to resolve this.

Generally speaking, if you want a new package installed, you should ask
that on infra at ovirt.org.

However, I am not at all happy with adding C code into Vdsm. What is it?
Python binding for glfs_statvfs ? Could this be implemented elsewhere
(such as an independent python-glfs package)?

Dan.


Hi,

We are making use of libgf-api for getting the statistics related
to a glusterfs volume, as it is more efficient than we mounting a volume
and getting the statistics.

libgfapi is a c api. Initially we tried using ctypes to wrap the
required functions in libgfapi. But because of a limitation in glusterfs
when these functions were invoked through supervdsm it would break.

So we thought of having an extension module that makes use of libgfapi
and provides the statistics, which can be used in vdsm.

what would be the better approach to resolve this ? Please provide us
your suggestions.

Thanks,
Darshan N

[Darshan Narayana Murthy]

----- Original Message -----
From: "Darshan Narayana Murthy" <dnarayan at redhat.com>
To: vdsm-devel at fedorahosted.org
Sent: Tuesday, April 8, 2014 11:21:27 AM
Subject: Re: [vdsm] Help Needed



----- Original Message -----
From: "Dan Kenigsberg" <danken at redhat.com>
To: "Darshan Narayana Murthy" <dnarayan at redhat.com>
Sent: Monday, April 7, 2014 4:53:30 PM
Subject: Re: Help Needed

Hi Dan,
I sent a patch for vdsm to get the gluster volume capacity
statistics using libgf api ( patch : http://gerrit.ovirt.org/#/c/26343 ),
This patch requires glusterfs-devel package for build.
It looks like jenkins does not have this package and so the build
for this patch is failing. Does jenkins automatically pull the required
package or is there anything to be done to get this package in jenkins ?.
Can you please help me to resolve this.

Generally speaking, if you want a new package installed, you should ask
that on infra at ovirt.org.

However, I am not at all happy with adding C code into Vdsm. What is it?
Python binding for glfs_statvfs ? Could this be implemented elsewhere
(such as an independent python-glfs package)?

Dan.


Hi,

We are making use of libgf-api for getting the statistics related
to a glusterfs volume, as it is more efficient than we mounting a volume
and getting the statistics.

libgfapi is a c api. Initially we tried using ctypes to wrap the
required functions in libgfapi. But because of a limitation in glusterfs
when these functions were invoked through supervdsm it would break.

Issue with the above approach was:
https://lists.fedorahosted.org/pipermail/vdsm-devel/2013-August/002537.html

So we thought of having an extension module that makes use of libgfapi
and provides the statistics, which can be used in vdsm.

what would be the better approach to resolve this ? Please provide us
your suggestions.

Thanks,
Darshan N

[Dan Kenigsberg]

Post by Darshan Narayana Murthy
----- Original Message -----
From: "Darshan Narayana Murthy" <dnarayan at redhat.com>
To: vdsm-devel at fedorahosted.org
Sent: Tuesday, April 8, 2014 11:21:27 AM
Subject: Re: [vdsm] Help Needed
----- Original Message -----
From: "Dan Kenigsberg" <danken at redhat.com>
To: "Darshan Narayana Murthy" <dnarayan at redhat.com>
Sent: Monday, April 7, 2014 4:53:30 PM
Subject: Re: Help Needed

Hi Dan,
I sent a patch for vdsm to get the gluster volume capacity
statistics using libgf api ( patch : http://gerrit.ovirt.org/#/c/26343 ),
This patch requires glusterfs-devel package for build.
It looks like jenkins does not have this package and so the build
for this patch is failing. Does jenkins automatically pull the required
package or is there anything to be done to get this package in jenkins ?.
Can you please help me to resolve this.

Generally speaking, if you want a new package installed, you should ask
that on infra at ovirt.org.
However, I am not at all happy with adding C code into Vdsm. What is it?
Python binding for glfs_statvfs ? Could this be implemented elsewhere
(such as an independent python-glfs package)?
Dan.
Hi,
We are making use of libgf-api for getting the statistics related
to a glusterfs volume, as it is more efficient than we mounting a volume
and getting the statistics.
libgfapi is a c api. Initially we tried using ctypes to wrap the
required functions in libgfapi. But because of a limitation in glusterfs
when these functions were invoked through supervdsm it would break.

I hope Toni can help out here, he found outr that when using threads,
you must declare the function prototype explicitly, but I'm not at all
sure this is your issue.

Post by Darshan Narayana Murthy
https://lists.fedorahosted.org/pipermail/vdsm-devel/2013-August/002537.html
So we thought of having an extension module that makes use of libgfapi
and provides the statistics, which can be used in vdsm.
what would be the better approach to resolve this ? Please provide us
your suggestions.

In my opionion, the python module that you suggest makes sense - but it
should be part of libgf - it is their's python binding (or part
thereof).

[Humble Chirammal]

Post by Dan Kenigsberg

Post by Darshan Narayana Murthy
----- Original Message -----
From: "Darshan Narayana Murthy" <dnarayan at redhat.com>
To: vdsm-devel at fedorahosted.org
Sent: Tuesday, April 8, 2014 11:21:27 AM
Subject: Re: [vdsm] Help Needed
----- Original Message -----
From: "Dan Kenigsberg" <danken at redhat.com>
To: "Darshan Narayana Murthy" <dnarayan at redhat.com>
Sent: Monday, April 7, 2014 4:53:30 PM
Subject: Re: Help Needed

Hi Dan,
I sent a patch for vdsm to get the gluster volume capacity
statistics using libgf api ( patch : http://gerrit.ovirt.org/#/c/26343 ),
This patch requires glusterfs-devel package for build.
It looks like jenkins does not have this package and so the build
for this patch is failing. Does jenkins automatically pull the required
package or is there anything to be done to get this package in jenkins ?.
Can you please help me to resolve this.

Generally speaking, if you want a new package installed, you should ask
that on infra at ovirt.org.
However, I am not at all happy with adding C code into Vdsm. What is it?
Python binding for glfs_statvfs ? Could this be implemented elsewhere
(such as an independent python-glfs package)?
Dan.
Hi,
We are making use of libgf-api for getting the statistics related
to a glusterfs volume, as it is more efficient than we mounting a volume
and getting the statistics.
libgfapi is a c api. Initially we tried using ctypes to wrap the
required functions in libgfapi. But because of a limitation in glusterfs
when these functions were invoked through supervdsm it would break.

I hope Toni can help out here, he found outr that when using threads,
you must declare the function prototype explicitly, but I'm not at all
sure this is your issue.

Post by Darshan Narayana Murthy
https://lists.fedorahosted.org/pipermail/vdsm-devel/2013-August/002537.html
So we thought of having an extension module that makes use of libgfapi
and provides the statistics, which can be used in vdsm.
what would be the better approach to resolve this ? Please provide us
your suggestions.

In my opionion, the python module that you suggest makes sense - but it
should be part of libgf - it is their's python binding (or part
thereof).

I have added glfs_statvfs in libgfapi python binding and its working ,
hopefully we can avoid all these issues via that.

Darshan, if we are getting any issue ( in vdsm ) even after using new
method, we will dig further..

[Darshan Narayana Murthy]

----- Original Message -----
From: "Humble Chirammal" <hchiramm at redhat.com>
To: "Dan Kenigsberg" <danken at redhat.com>, "Darshan Narayana Murthy" <dnarayan at redhat.com>
Cc: vdsm-devel at fedorahosted.org, "Vijay Bellur" <vbellur at redhat.com>
Sent: Wednesday, April 9, 2014 11:42:09 AM
Subject: Re: [vdsm] Help Needed

Post by Dan Kenigsberg

Post by Darshan Narayana Murthy
----- Original Message -----
From: "Darshan Narayana Murthy" <dnarayan at redhat.com>
To: vdsm-devel at fedorahosted.org
Sent: Tuesday, April 8, 2014 11:21:27 AM
Subject: Re: [vdsm] Help Needed
----- Original Message -----
From: "Dan Kenigsberg" <danken at redhat.com>
To: "Darshan Narayana Murthy" <dnarayan at redhat.com>
Sent: Monday, April 7, 2014 4:53:30 PM
Subject: Re: Help Needed

Hi Dan,
I sent a patch for vdsm to get the gluster volume capacity
statistics using libgf api ( patch : http://gerrit.ovirt.org/#/c/26343 ),
This patch requires glusterfs-devel package for build.
It looks like jenkins does not have this package and so the build
for this patch is failing. Does jenkins automatically pull the required
package or is there anything to be done to get this package in jenkins ?.
Can you please help me to resolve this.

Generally speaking, if you want a new package installed, you should ask
that on infra at ovirt.org.
However, I am not at all happy with adding C code into Vdsm. What is it?
Python binding for glfs_statvfs ? Could this be implemented elsewhere
(such as an independent python-glfs package)?
Dan.
Hi,
We are making use of libgf-api for getting the statistics related
to a glusterfs volume, as it is more efficient than we mounting a volume
and getting the statistics.
libgfapi is a c api. Initially we tried using ctypes to wrap the
required functions in libgfapi. But because of a limitation in glusterfs
when these functions were invoked through supervdsm it would break.

I hope Toni can help out here, he found outr that when using threads,
you must declare the function prototype explicitly, but I'm not at all
sure this is your issue.

Post by Darshan Narayana Murthy
https://lists.fedorahosted.org/pipermail/vdsm-devel/2013-August/002537.html
So we thought of having an extension module that makes use of libgfapi
and provides the statistics, which can be used in vdsm.
what would be the better approach to resolve this ? Please provide us
your suggestions.

In my opionion, the python module that you suggest makes sense - but it
should be part of libgf - it is their's python binding (or part
thereof).

I have added glfs_statvfs in libgfapi python binding and its working ,
hopefully we can avoid all these issues via that.

Darshan, if we are getting any issue ( in vdsm ) even after using new
method, we will dig further..
--
Cheers,
Humble Chirammal

yes, I will try and use libgfapi python for this.

Thanks,
Darshan N




Sr. Software Engineer
Red Hat India Pvt. Ltd