Gluster users - Mar 2010 - Quickread Translator Memory Leak?

Has anyone else noticed a memory leak when using the Quickread translator? I 
created a backup server that rsync's gluster mounts to a Coraid SAN device. 
Originally I simply copied the vol files from my production workstations to 
this server. However I quickly found out that when rsync was running the 
memory usage of the glusterfs processed was climbing out of control. The 
server would exhaust the ram, swap everything out, and then glusterfs would 
get killed by the oom condition. Commenting out the Quickread translator:

#volume quickread
#    type performance/quick-read
#    option cache-timeout 1
#    option max-file-size 64kB
#    subvolumes iocache
#end-volume

and skipping it for the mount fixed the problem.

My workstations are having a problem as well. After running for a few days (as 
long as a week) the users start having their sessions killed. They are 
returned to a login prompt, and can login again. Glusterfs is still running at 
this point, but I think thats because all the users apps were first on the kill 
list for an oom condition. The backup server runs nothing but glusterfs and 
rsync.

-- 
Benjamin Long

Benjamin Long wrote:
> Has anyone else noticed a memory leak when using the Quickread translator? 
>
>   
Quickread translator does unlimited caching as of now. This is not a 
memory leak but it has the same effect in exhausting available memory.
We are going to improve this behavior through enhancement bug
723.
> My workstations are having a problem as well. After running for a few days
(as
> long as a week) the users start having their sessions killed. They are 
> returned to a login prompt, and can login again. Glusterfs is still running
at
> this point, but I think thats because all the users apps were first on the
kill
> list for an oom condition. The backup server runs nothing but glusterfs and
> rsync.
>   
Do you have details of GlusterFS's memory usage (Resident Memory and 
percentage of memory used) at the instant when the oom condition was 
observed?


Regards,
Vijay