Patchless Client

2007-06-06T22:09:11Z

Cliffw:

== Patchless Client ==
As of Lustre 1.6.0, Lustre supports running the client modules on some unpatched "stock" kernels.
This results in some small performance losses, but may be worthwhile to some users for maintenance or contract reasons.

We will typically post a "patchless" RPM at the [http://downloads.clusterfs.com/customer download site]. Instead, if building from source, the Lustre configure script will automatically detect the unpatched kernel and disable building the servers.

[lustre]$ ./configure --with-linux=/unpatched/kernel/source

=== Versions ===
Currently, the patchless client works with these kernel versions

Vanilla kernel:
* 2.6.15 (1.6.0)
* 2.6.16 (1.6.0)
* 2.6.17 (1.6.0) Mandriva's 2.6.17 is also reported working.
* 2.6.18 (1.6.0) Debian 4.0 2.6.18 is also reported working
* 2.6.19 (1.6.0)
* 2.6.20 (1.6.1 [https://bugzilla.lustre.org/show_bug.cgi?id=11647 bug 11647])
* 2.6.21 (1.6.1 [https://bugzilla.lustre.org/show_bug.cgi?id=11647 bug 11647])

Red Hat Enterprise Linux:
* RHEL4 [2.6.9-42.0.8EL] (1.6.0) with the following caveats:
- Nested Symlinks: due to improper lookup_continue logic with unpatched 2.6.15
kernels and earlier, nested symlinks will lead to unpredictable results
- FMODE_EXEC missing: Lustre will incorrectly allow a user from one client to
write/truncate a binary simultaneously while a user from a different client
executes the same binary
* RHEL4U5 [2.6.9-55EL] (1.6.0) Red Hat has includesd a Lustre-specific patch
with RHEL4U5 which resolves the above issues.

* RHEL5 (1.6.1 [https://bugzilla.lustre.org/show_bug.cgi?id=11647 bug 11647])

Fedora Core:
* FC6 (1.6.1 [https://bugzilla.lustre.org/show_bug.cgi?id=11647 bug 11647])

Suse:
* SLES 10 (tbd)

=== Known Issues ===

many NFS-related bugs are also addressed by the patchless client fixes.

Obsolete Lustre Wiki - User contributions [en]

Patchless Client