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ipvs: fix sync_threshold description and add sync_refresh_period, sync_retries

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Fix sync_threshold description which should have two values. Also add
sync_refresh_period and sync_retries based on commit 749c42b620
("ipvs: reduce sync rate with time thresholds").

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
This commit is contained in:
Hangbin Liu 2017-02-20 16:31:35 +08:00 committed by Simon Horman
parent 864e91ca98
commit a2f346d82b
1 changed files with 30 additions and 8 deletions
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38
Documentation/networking/ipvs-sysctl.txt
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@ -185,15 +185,37 @@ secure_tcp - INTEGER
The value definition is the same as that of drop_entry and
drop_packet.
sync_threshold - INTEGER
default 3
sync_threshold - vector of 2 INTEGERs: sync_threshold, sync_period
default 3 50
It sets synchronization threshold, which is the minimum number
of incoming packets that a connection needs to receive before
the connection will be synchronized. A connection will be
synchronized, every time the number of its incoming packets
modulus 50 equals the threshold. The range of the threshold is
from 0 to 49.
It sets synchronization threshold, which is the minimum number
of incoming packets that a connection needs to receive before
the connection will be synchronized. A connection will be
synchronized, every time the number of its incoming packets
modulus sync_period equals the threshold. The range of the
threshold is from 0 to sync_period.
When sync_period and sync_refresh_period are 0, send sync only
for state changes or only once when pkts matches sync_threshold
sync_refresh_period - UNSIGNED INTEGER
default 0
In seconds, difference in reported connection timer that triggers
new sync message. It can be used to avoid sync messages for the
specified period (or half of the connection timeout if it is lower)
if connection state is not changed since last sync.
This is useful for normal connections with high traffic to reduce
sync rate. Additionally, retry sync_retries times with period of
sync_refresh_period/8.
sync_retries - INTEGER
default 0
Defines sync retries with period of sync_refresh_period/8. Useful
to protect against loss of sync messages. The range of the
sync_retries is from 0 to 3.
snat_reroute - BOOLEAN
0 - disabled