[Gluster-users] Gluster setup question

Aleynikov, Serge Serge.Aleynikov at gs.com
Thu Nov 20 15:31:53 UTC 2008

I built it from glusterfs-1.3.12.tag.gz source.


	From: basavanagowda at gmail.com [mailto:basavanagowda at gmail.com]
On Behalf Of Basavanagowda Kanur
	Sent: Wednesday, November 19, 2008 10:50 PM
	To: Aleynikov, Serge
	Cc: gluster-users at gluster.org
	Subject: Re: [Gluster-users] Gluster setup question
	  I am assuming you are not using source code from repository.
	  If you are using source code directly from repository, then
answers below might not hold good. Please mention the version, if you
are using from source repository.
	On Thu, Nov 20, 2008 at 6:13 AM, Aleynikov, Serge
<Serge.Aleynikov at gs.com> wrote:


		I am running several clients writing to local disk that
are setup to replicate data to N glusterfs server processes that use NFS
for storing this data.  I have the following questions:

		1. Does every write of a process to a local directory
managed by glusterfs client involve syncronous replication of data to
glusterfs server?

	yes. it involves synchronous replication. 
	glusterfs--mailine--3.0--patch-621 (onwards) in our source
repository  has an AFR feature called quick-unwind, which would make
replication asychronous.


		2. Is it possible that if NFS is slow on the glusterfs
server side, then writing to local disk of a process on the glusterfs
client's machine would block?

	yes. fops on glusterfs will block.




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