Re: [Mysqlfs-general] mysqlfs patch

[Stef B. <st...@bo...>]

On Wednesday 22 August 2007 10:50:32 Andrew Rose wrote:

> > I would like to reply to you. I 'm not a programmer, but as far as I can see
> > multithreading is also important. I wanted to use mysqlfs as a backup, but failed beacuse of the
> > lack of multithreading.
> 
> Correct me if I'm wrong but I was under the impression FUSE handled
> the threading.  All that mysqlfs needs to do is maintain the mysql
> connections (the pool) and keep them thread safe.  The locking (inode
> and data_blocks) as far as I can picture it should be done on the
> database level.
Now I'm do not have a lot of experience (I'm systemenigineer, not a C/C++ programmer)
with multithreading, but when I look to the code of for example sshfs or fusesmb, threading 
is done in the modules as well.(look for pthread_mutex_lock).
> 
> Does anyone have any information on how FUSE handles inode creation?
> The problem with multi-master inode clashing as far as I can see it is
> when two servers (or more) create a file and pick the same inode (for
> a file that they regard as local) that the clash occurs.

I'm sorry. I cannot help you here. Did you look into the source?

Stef Bon