[Gluster-users] gluster 3.0 read hangs

[Nick Birkett]

I ran some benchmarks last week using 2.0.8. Single server with 8 Intel 
e1000e  bonded  mode=balance-alb

All worked fine and I got some good results using 8 clients. All Gigabit.

The benchmarks did 2 passes of IOZONE  in network mode using 1-8 threads 
per client and using 1 - 8 clients. Each client used 32Gbyte files.

All jobs completed successfully. This takes about 32 hours to run 
through all cases.

Yesterday I updated to 3.0.0 (server and clients) and re-configured the 
server and client vol files using glusterfs-volgen (renamed some of the 
vol names).

RedHat EL5 binary packages from Glusterfs site installed
glusterfs-server-3.0.0-1.x86_64
glusterfs-common-3.0.0-1.x86_64
glusterfs-client-3.0.0-1.x86_64


All works mainly ok, except every so often the IOZONE job just stops. 
The network IO drops to zero.
This is always happens during either a read or re-read test. It happes 
just as the IOZONE read
test starts. It doesnt happen every time and it may run
for several hours without incident. This has happened 6 times on 
different test cases (thread/clients).



Anyone else noticed this ? Perhaps I have done something wrong ?

vol files attached  - I know I dont need to distribute 1 remote vol - 
part of larger test with multiple vols.

Attached sample outputs. 4 clients 4 files per client ran fine. 4 
clients 8 files per client hung at re-read
on 2nd pass of IOZONE. All jobs with 5 clients and 8 clients ran to 
completion.

Thanks,

Nick

 




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