[Moosefs-users] Write starvation

[Robert S. <rsa...@ne...>]

I have been moving data from existing non-distributed file systems onto 
a MooseFS file system.

I am using 1.6.20 on Centos 5.6.

While moving the data I have also transfered some of the normal 
read-only traffic load to use the data already moved onto the MFS volume.

What I can see is when there is any significant read traffic then write 
traffic slows down to a crawl.

When I look at the server charts for any of the chunk servers generated 
by mfscgiserv then it seems like read and write traffic seems to alternate.

Write traffic does not stop completely, but seems to slow down to < 10 
kB per second under high read traffic conditions. When the read traffic 
decreases the write traffic will increase to normal levels.

Is this a known problem? Is there something I can do to ensure that 
write traffic is not starved by read traffic?

Robert