rib-sharding
Syntax
rib-sharding { number-of-shards; }
Hierarchy Level
[edit system processes routing bgp]
Description
Enable BGP RIB sharding. BGP RIB sharding is to split the BGP process across routes. Different routes are hashed into different threads to achieve concurrency. BGP RIB sharding splits a unified BGP RIB into several sub RIBs and each sub RIB handles a subset of BGP routes. Each sub RIB is served by a separate RPD thread to achieve concurrency. BGP RIB sharding is disabled by default. To enable, you need to explicitly configure it on a multicore routing engine. This feature is supported only on 64-bit routing protocol process (rpd) where the Routing Engine has more than one core. We recommend configuring this feature on a device with atleast 4CPU cores and 16GB of memory.
RPD would restart automatically when rib-sharding or update-threading configuration is changed.
Sharding requires Update/IO thread. If
rib-sharding
is configured andupdate-threading
is not configured, the commit check fails.
Options
number of shards
—the number
of sharding threads created. If you configure rib-sharding
on a routing engine, RPD creates sharding threads. By default, it
is the same as the number of CPU cores on the routing engine. Optionally,
you can specify the number-of-shards you want to create.
Range: 1-31 shards
Required Privilege Level
system—To view this statement in the configuration.
system-control—To add this statement to the configuration.
Release Information
Statement introduced in Junos OS Release 19.4R1.
Support for NSR with sharding introduced in Junos OS Release 22.2.