Added ucast cache info in current-routing.txt Signed-off-by: Yevgeny Kliteynik <[EMAIL PROTECTED]> --- opensm/doc/current-routing.txt | 11 +++++++++++ 1 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/opensm/doc/current-routing.txt b/opensm/doc/current-routing.txt index 2bb6c2f..af008bc 100644 --- a/opensm/doc/current-routing.txt +++ b/opensm/doc/current-routing.txt @@ -28,6 +28,17 @@ two switches. This provides deadlock free routes for hypercubes when the fabric is cabled as a hypercube and for meshes when cabled as a mesh (see details below). +OpenSM provides an optional unicast routing cache (enabled by -A or +--ucast_cache options). When enabled, unicast routing cache prevents +routing recalculation (which is a heavy task in a large cluster) when +there was no topology change detected during the heavy sweep, or when +the topology change does not require new routing calculation, e.g. when +one or more CAs/RTRs/leaf switches going down, or one or more of these +nodes coming back after being down. +A very common case that is handled by the unicast routing cache is host +reboot, which otherwise would cause two full routing recalculations: one +when the host goes down, and the other when the host comes back online. + OpenSM also supports a file method which can load routes from a table. See modular-routing.txt for more information on this. -- 1.5.1.4 _______________________________________________ general mailing list general@lists.openfabrics.org http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
