os/doc
3
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

Add 2017Q1 pNFS entry from rmacklem

Browse source 
Some additions to the introductory material by me, as well.
This commit is contained in:
Benjamin Kaduk 2017-04-16 00:38:53 +00:00
parent 8897bb3f97
commit bfab6b1508
Notes: svn2git 2020-12-08 03:00:23 +00:00 
svn path=/head/; revision=50167
1 changed files with 49 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

49
en_US.ISO8859-1/htdocs/news/status/report-2017-01-2017-03.xml
View file

@ -244,4 +244,53 @@
least 3 more bits out, one at each level.</task>
</help>
</project>
<project cat="kern">
<title>pNFS server Plan B</title>
<contact>
<person>
<name>
<given>Rick</given>
<common>Macklem</common>
</name>
<email>rmacklem@FreeBSD.org</email>
</person>
</contact>
<body>
<p>Parallel NFS (pNFS) is an extension to the NFSv4 protocol that
allows for file accesses within a single logical mount to be
performed against multiple NFS file servers, "in parallel".
Thus, a pNFS server separats the MetaData operations from the
Data operations (Read/Write/Setattr of size N), letting
existing NFSv3 servers be used for the bulk data storage
while still taking advantage of NFSv4 protocol enhancements,
among other things.</p>
<p>My first attempt at a pNFS server using GlusterFS was a dud.
It worked, but performance was so poor that it was not
usable. This attempt that I call Plan B, only uses &os;,
with one &os; server handling the MetaData operations and K
&os; servers configured to serve Data. An NFSv4.1 client
that supports the pNFS File Layout will be able to
Read/Write to the Data servers directly, spreading out the
RPC load and allowing growth beyond that of what a single
&os; NFS server could achieve.</p>
<p>There is no support for the Flex Files Layout or mirroring
at this time. I hope to use the Flex Files Layout to add
mirroring support over the next year or so. Striping is
also not supported, but I have no plans for implementing it
at the moment.</p>
<p>Plan B is working quite well now and should be available
for testing by the end of April. I will announce how to do this on
the freebsd-fs@FreeBSD.org mailing list when it is available.</p>
</body>
<help>
<task>Testing by others will be needed, once it is available.</task>
</help>
</project>
</report>