| Important note: | All patches presented here must be applied over a clean source tree of the indicated SQUID's version. Do not try to apply more than one patch at a time, older patches are published for consistency only !!! |
| Latest (recomended) ZPH patches
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| ZPH type | Date of last modification | Description |
| TOS preserving on MISS | 26-Mar-2011 - Linux kernel 2.6.35 patch (tested on Ubuntu 10.10 Maverick Meerkat) |
The Squid caching engine version 3.1.x has the ZPH feature build-in, so you no longer need to patch the source code yourself. For those, who require the incoming TOS
preserving feature (on cache MISS), I'm providing the linux kernel 2.6.35 patch: Kernel 2.6.35 ZPH TOS preserving patch. Note: The same patch applies (ignore the hunks) on the latest vanilla kernel at the time of writing (2.6.38.1) |
| TOS marking with TOS preserving on MISS |
25-Aug-2008 - Patch version for SQUID-3.0STABLE8. | A bug has been fixed in this updated Squid patch. The bug prevented marking parent/sibling hits with the value of zph_tos_peer. The value of zph_tos_local was used instead. Additionally the kernel patch has been updated to support latest kernel source tree. The kernel patch has also been improved - it shall now capture the TOS value in the first data segment received from the remote peer. This allows preserving the TOS value of a missed request coming from a parent cache that is also ZPH patched. Links: Squid-3.0STABLE8 ZPH patch Kernel 2.6.26.3 ZPH patch. |
| TOS marking with TOS preserving on MISS |
24-Apr-2008 - Patch version for SQUID-3.0STABLE4. | No changes in patch, simply adjusted to apply cleanly on the latest SQUID 3.0 source tree. To have the TOS preserving feature working, you will also need a kernel patch. Links: Squid-3.0STABLE4 ZPH patch Kernel 2.6.25 ZPH patch. |
| TOS marking with TOS preserving on MISS |
13-Aug-2006 - Patch version for SQUID 2.6STABLE2. | No changes in patch, simply adjusted to apply cleanly on the latest SQUID 2.6 source tree. Here it is: squid-2.6.STABLE2 |
| TOS marking with TOS preserving on MISS |
05-March-2006 - Patch version for SQUID 2.5STABLE12-20060305 snapshot build. I hope it will aslo apply for STABLE13 when it is released. |
No changes in patch, simply adjusted to apply cleanly. Here it is: SQUID2.5STABLE12-20060305 |
| TOS marking with TOS preserving on MISS |
03-March-2006 - Updated patch versions for SQUID 2.5STABLE12 and latest 2.6 kernel 2.6.15.5 |
No changes in patches, simply adjusted to apply cleanly on the latest versions of SQUID and linux 2.6 kernel. Links follow: |
| TOS marking with TOS preserving on MISS |
03-June-2005 - small fix that cleans SQUID compilation problems under gcc 2.95 series (patch has been overwritten) 26-May-2005 - initial release |
Extension of the ZPH TOS marking patch which preserves the original TOS received from the remote server when a cache MISS occures (TOS copying). It consists of two patches - one for SQUID, and another for the linux kernel. This is the initial release which supports squid-2.5.STABLE10 combined with linux kernel version 2.4.30(and possibly up) or 2.6.11.10 (and possibly up) . Read more info here. |
| TOS marking | 16-May-2005 | Update of ZPH Evgeni Gechev's TOS marking patch for STABLE10 (at least RC3) - squid-2.5.STABLE10-ToS_Hit.patch. There are no differences compared to the STABLE7 patch - just a fix to make it apply cleanly for STABLE10 source tree. Here is documentation about applying. |
| TOS marking | 16-May-2005 | Update of ZPH Evgeni Gechev's TOS marking patch for STABLE9 - squid-2.5.STABLE9-ToS_Hit.patch. There are no differences compared to the STABLE7 patch - just a fix to make it apply cleanly for STABLE9 source tree. Here is documentation about applying. |
| IP Option marking | 13-Dec-2004 | ZPH with IP option marking for squid-2.5.STABLE7 - nothing new, just synchronized with the latest squid source. Applies cleanly on STABLE9 and STABLE10 (At least for RC3) source trees. |
| Older versions of ZPH patches (not needed when using the latest one)
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| 11-Dec-2004 | Stable ZPH TOS marking patch, by Evgeni Gechev for STABLE7 - squid-2.5.STABLE7-ToS_Hit.patch. There are no differences compared to the STABLE5 patch (which is compatible with STABLE6, too) - just a fix to make it apply cleanly for STABLE7. Here is documentation about applying. | |
| 02-Oct-2004 | ZPH with IP option marking for squid-2.5.STABLE6 by Teodor Yantchev. Thanks Teodor ! | |
| 27-Apr-2004 | Stable ZPH TOS marking patch, by Evgeni Gechev for STABLE5, here is the changelog and documentation about applying. | |
| 20-Mar-2004 | Yet another important development of ZPH TOS marking patch, by Evgeni Gechev. Here's the changelog | |
| 20-Feb-2004 | A subtle, but important for some cases contribution by Evgeni Gechev to the TOS marking option. Read more... | |
| 08-Dec-2003 | Thanks to Venkatesh K. Reddy we have a TOS marking option for HIT packets. | |
| 16-Oct-2003 | A new version is available - the ultimate HIT packets marking solution. | |
Currently there are 3 different versions of the patch. The old one has one major limitation - traffic shaping has to be done on the same machine, where Squid engine is running. It is still published here, but I recomend the usage of the latest versions of either TOS or IP option marking solutions:
2. Here is the latest version (13-Dec-2004) of the IP option marking. Take a look at the Documentation before applying the patch. An older version covering squid STABLE3/4/5 can be downloaded from here.
3. The oldest version of the patch can be found here. It should compile with squid-2.5.STABLE-3, STABLE-4 and probably older versions as well (though not tested). Documentation about applying the patch can be found here.
I made this patch to deal with a problem of the current QoS design I have implemented. I'm using a single Linux box to act as Firewall/NAT/Transparent HTTP cache for a small network of computers. The box also imposes the QoS policies for the communications to/from the Internet. The QoS is based on HTB+SFQ queuing disciplines. Statistics gathered from the squid cache (through SNMP) clearly show an average monthly HIT rate of about 25%. Unfortunately, unless using the delay pools feature of SQUID, there is no way to limit only those requests served from remote servers. The Delay pools are a nice feature of SQUID, but cannot work efficiently due to the lack of communication with the QoS policies beneath. What I needed was a way to classify packets and set no penalty in bandwidth and delay, when the information is served from SQUID's cache.