Gluster users - Apr 2015 - unusual gluster-fuse client load

All,

I have an unusual situation.

I have a client whose 1 fuse mount to a volume adds increased load to the 
machine when its mounted.  When it is not mounted the server is well below 
1.00 in top/uptime for load avg.

The strange part is, this gluster volume is mounted across multiple 
servers in my environment where the load is not observed. 

I've tried strace, and saw nothing usual.  I've even rebooted the client
thinking, that there is might be "some odd cache"  but there was no
change
as the load started to climb after the reboot, and mounting of the fuse 
filesystem. 

Nothing in the client/server logs regarding that fuse volume. 

Would the community have any suggestions that I might investigate more of? 
 I haven't tried to wireshark yet.  But i'm not certain I know what to 
look for if I did capture the tcp dump.

Thanks,

Khoi Mai
Union Pacific Railroad
Distributed Engineering & Architecture
Senior Project Engineer



**

This email and any attachments may contain information that is confidential
and/or privileged for the sole use of the intended recipient.  Any use, review,
disclosure, copying, distribution or reliance by others, and any forwarding of
this email or its contents, without the express permission of the sender is
strictly prohibited by law.  If you are not the intended recipient, please
contact the sender immediately, delete the e-mail and destroy all copies.
**
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://www.gluster.org/pipermail/gluster-users/attachments/20150427/8d047b1d/attachment.html>

----- Original Message -----
> From: "Khoi Mai" <KHOIMAI at UP.COM>
> To: gluster-users at gluster.org
> Sent: Monday, April 27, 2015 10:43:27 AM
> Subject: [Gluster-users] unusual gluster-fuse client load
> 
> All,
> 
> I have an unusual situation.
> 
> I have a client whose 1 fuse mount to a volume adds increased load to the
> machine when its mounted. When it is not mounted the server is well below
> 1.00 in top/uptime for load avg.
> 
> The strange part is, this gluster volume is mounted across multiple servers
> in my environment where the load is not observed.
> 
> I've tried strace, and saw nothing usual. I've even rebooted the
client
> thinking, that there is might be "some odd cache" but there was
no change as
> the load started to climb after the reboot, and mounting of the fuse
> filesystem.
> 
> Nothing in the client/server logs regarding that fuse volume.
> 
> Would the community have any suggestions that I might investigate more of?
I
> haven't tried to wireshark yet. But i'm not certain I know what to
look for
> if I did capture the tcp dump.
What process is causing load to increase?  Normally I look at ps or top and see
what is stuck in D or is using all my CPU.  Do you have anything scanning the
gluster mount or accessing it in the background?  Just mounting on a client
shouldn't cause the system to get too much busier, I would think that
something is accessing the mount.  What is the load when you see when you mount?

-b
 
> Thanks,
> 
> Khoi Mai
> Union Pacific Railroad
> Distributed Engineering & Architecture
> Senior Project Engineer
> 
> 
> 
> 
> **
> 
> 
> 
> This email and any attachments may contain information that is confidential
> and/or privileged for the sole use of the intended recipient. Any use,
> review, disclosure, copying, distribution or reliance by others, and any
> forwarding of this email or its contents, without the express permission of
> the sender is strictly prohibited by law. If you are not the intended
> recipient, please contact the sender immediately, delete the e-mail and
> destroy all copies.
> 
> **
> 
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
> http://www.gluster.org/mailman/listinfo/gluster-users