Serge,<br> I am assuming you are not using source code from repository.<br> 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.<br>
<br><div class="gmail_quote">On Thu, Nov 20, 2008 at 6:13 AM, Aleynikov, Serge <span dir="ltr"><<a href="mailto:Serge.Aleynikov@gs.com">Serge.Aleynikov@gs.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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<p><font face="Arial" size="2">Hi,</font>
</p>
<p><font face="Arial" size="2">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:</font></p>
<p><font face="Arial" size="2">1. Does every write of a process to a local directory managed by glusterfs client involve syncronous replication of data to glusterfs server?</font></p></div></blockquote><div>yes. it involves synchronous replication. <br>
<br>glusterfs--mailine--3.0--patch-621 (onwards) in our source repository has an AFR feature called quick-unwind, which would make replication asychronous.<br><br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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<p><font face="Arial" size="2">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?</font></p></div></blockquote><div>
yes. fops on glusterfs will block.<br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div><p><font face="Arial" size="2"></font></p>
<p><font face="Arial" size="2">Thanks.</font>
</p>
<p><font face="Arial" size="2">Serge</font>
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<br></blockquote></div><br><br clear="all"><br>-- <br>gowda<br>