🔗 QoS (Quality of Service) Support
- Version: 3.1, 2.7
- Developer: Marin Stavrev
- More: http://zph.bratcheda.org/
🔗 Details
Zero Penalty Hit created a patch to set QoS markers on outgoing traffic to clients.
- Allows you to select a TOS/Diffserv value to mark local hits.
- Allows you to select a TOS/Diffserv value to mark peer hits.
- Allows you to selectively set only sibling or parent requests
- Allows any HTTP response to clients will have the TOS value of the response coming from the remote server masked. For this to work correctly, you will need to patch your linux kernel with the TOS preserving ZPH patch. The kernel patch can be downloaded from http://zph.bratcheda.org
- Allows you to mask certain bits in the TOS received from the remote server, before copying the value to the TOS send towards clients.
🔗 Squid Configuration
requires –enable-zph-qos configure option
🔗 Squid 3.2 and later
The configuration options for Squid-3.2 are extended to support both TOS and Linux MARK tagging.
The 0xNN values here are set according to your system policy. They may differ from those shown.
Responses found as a HIT in the local cache
qos_flows tos local-hit=0x30
qos_flows mark local-hit=0x30
Responses found as a HIT on sibling peer.
qos_flows tos sibling-hit=0x31
qos_flows mark sibling-hit=0x31
Responses found as a HIT on parent peer.
qos_flows tos parent-hit=0x32
qos_flows mark parent-hit=0x32
Responses found as a MISS may have existing values.
-
preserve-miss locates and passes the same settings received by
Squid from the remote server, on the client connection. On non-Linux
or unpatched Linux the miss TOS is always zero. The capability may
be disabled if desired.
TOS requires Linux with kernel patching.
qos_flows tos disable-preserve-miss qos_flows mark disable-preserve-miss -
miss sets a new value on MISS responses to the client from
Squid. An optionanl mask can be applied to limit which bits are set
to the new value. Unmasked bits are preserved from the value
received from server.
TOS requires Linux with kernel patching to reserve and mask the
existing value from server.
On non-Linux or unpatched Linux the miss TOS is always zero. The capability may be disabled if desired.
qos_flows tos miss=0x0A/0x0F
qos_flows mark miss=0x0A/0x0F
🔗 Squid 3.1
The configuration options for 2.7 and 3.1 are based on different ZPH patches. The 3.1 configuration provides clear TOS settings for each outbound response type.
Responses found as a HIT in the local cache
qos_flows local-hit=0x30
Responses found as a HIT on sibling peer.
qos_flows sibling-hit=0x31
Responses found as a HIT on parent peer.
qos_flows parent-hit=0x32
preserve-miss locates and passes the same TOS settings received by Squid from the remote server, on the client connection.
On non-Linux or unpatched Linux the miss TOS is always zero. The capability may be disabled if desired.
qos_flows disable-preserve-miss
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