[Gluster-devel] optimizing gluster fuse

Amar Tumballi atumball at redhat.com
Mon Apr 2 09:41:18 UTC 2018

Hi Riya,

Thanks for writing to us. Some questions before we start on this.

* Where can we see your work of modifying the fuse module to cache the
calls? Some reference would help us to provide more specific pointers. (or
ask better questions).

* If the caching happened in fuse module, and it expects the regular
arguments as the parameters, then there may not be any work required at all
in glusterfs, as it works on low-level fuse api.

* Also, how to invalidate caches from userspace program? because GlusterFS
could be accessed from multiple clients, so it becomes an important piece
to have.

For referring at the codebase to look at integration with fuse module,
please check the directory 'xlators/mount/fuse/src/' and mostly the file

Thanks for your interest in project, would be great to collaborate on this
effort, as it can enhance the performance of glusterfs in many usecases.


On Mon, Apr 2, 2018 at 6:34 AM, riya khanna <riyakhanna1983 at gmail.com>

> Hi,
> I've modified FUSE framework to take a part of user-space daemon code and
> moves it into the kernel fuse driver to minimize user-kernel-user switches
> during file system  operations. An example would be caching
> getattr/getxattr/lookup/security checks etc. This design, therefore,
> create fast (served directly from the kernel) and a slow (regular fuse)
> execution paths. The fast and slow paths can also communicate with each
> other using shared memory.
> I was wondering if it is possible to accelerate glusterfs using this
> design. What pieces could (should) be easily moved to kernel space? Any
> pointers would be highly appreciated. Thanks!
> -Riya
> _______________________________________________
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> Gluster-devel at gluster.org
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Amar Tumballi (amarts)
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