Thanks Vijay for quick response.
On a related question if multiple vms are created using qemu GlusterFS block driver on the same volume then volume consistency is assured by the gluster driver, correct.
Murali Balcha
On 09/20/2013 06:36 AM, Murali Balcha wrote:
Hi,
I have couple of questions on libgfapi.
1.Can two or more clients on either same host or different hosts access
single volume thru libgfapi?
Yes, it is possible.
2.How do clients synchronize access to files? I believe both clients
have their instance of client side translators loaded, right?
Yes, Both clients will have their own instances of client xlators loaded. GlusterFS/libgfapi has support for advisory posix locking and applications can make use of that if multiple application instances need to synchronize access to files. If a replicated
gluster volume is used, the afr translator makes use of a transaction framework to synchronize updates and provide consistency.
3.Does it use lk translator for synchronizing access to files?
Yes, the lk translator loaded on the server stack is used for synchronization.
Regards,
Vijay