Syntax
update-threading {
number-of-threads;
group-split-size;
}
}
Hierarchy Level
[edit system processes routing bgp]
Description
Enables BGP update thread. If you configure update-threading on a Routing Engine, RPD creates
update threads.
Note: Sharding requires Update/IO thread. If rib-sharding is configured and update-threading is not configured,
the commit check fails.
RPD would restart automatically when rib-sharding or update-threading
configuration is changed.
Options
number of threads |
number of threads—the number of update threads created.
If you configure update-threading on a Routing Engine, RPD creates
update threads. By default, the number of update threads created is same
as the number of CPU cores on the Routing Engine. Optionally, you can
specify the number-of-threads you want to create.
|
group-split-size |
group-split-size—the large groups are divided into
fragments based on the configuration of the
group-split-size (The size here is the number of
peers). The feature is enabled only after a
group-split-size number is provided, until then the
feature remains disabled (since the split size would be 0). The
objective of the feature is to share the load with different threads
since multiple threads are always available to process. This
group-split-size statement defines the size that we
are using to split the peer group.
You can adjust the group-split-size value according to
the requirement. There are two general tips for finding a reasonable
group-split-size:
- Do not make it too large so that the system is not evenly
distributed. For example, when we have one group of 1000 peers and
10 available threads, setting split-size to 100 is better than 200
because it allows the system to utilize all 10 threads for 100 peers
per thread compared to only 5 will be used for 200 peers per
thread.
- Do not make it too small so that it takes the unnecessary overhead
of splitting groups. For example, if we have 10 groups (each group
contains 103 peers) and 10 available threads, setting split-size to
103 will be better than 100 because splitting a group of 103 to 100
and 3 will give us unnecessary overhead.
|
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.
group-split-size statement introduced in Junos OS Release
21.4R1.
Support for NSR with sharding introduced in Junos OS Release 22.2.
