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<p class="MsoNormal"><span style="color:windowtext">I don’t need it to cache anything – the goal of it is not performance optimization, it is to provide restricted access to the internet. I have 1200 Mbps of network i/o available to the squid servers and can
confirm I am able to reliably achieve at least 800 Mbps when I download something directly on the squid server. Additionally, it would be extremely rare that the same file ever would get downloaded more than once, if it ever actually happens.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:windowtext">By policy none of the servers may have direct internet access. This is to protect the data contained in the environment. Only one 4 bit subnet has internet access, where the squids are located, and 8 of the
45 servers need restricted internet access.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:windowtext">This config is complete at least in a base configuration. If I have time in the project I am going to add URI restrictions. The 8 servers will only need to get to about 30-40 static URIs in total and want
to block the others, but first I need to get the throughput up.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:windowtext">I have 800 Mbps minimum available bandwidth to the squid servers that I can confirm is available in download tests from the squids. I have 1200 Mbps (these are Azure virtual machines) of bandwidth available
in both directions between the servers that use the squids and the squids.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:windowtext">However on large files I am only getting 115 Kbps sustained download speeds.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:windowtext">Now if squid needs to be able to buffer the downloads to cache in order to perform well – I could enable caching if that is the case, but would prefer to not cache anything. I very seriously doubt that I will
ever download the same file two times in this environment as the only thing being downloaded is software updates that are centrally distributed from WSUS, and antivirus definitions that are released about 6-10 times per day. Most of the traffic is also https,
with very little http.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:windowtext">Is it the case that I may see better performance if I configure it to cache the files first before sending it to clients?<o:p></o:p></span></p>
<div>
<p class="MsoNormal"><b><span style="font-size:12.0pt;color:windowtext"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;color:windowtext">Keith Hartley<o:p></o:p></span></b></p>
<p class="MsoNormal"><i><span style="color:windowtext">Network Engineer II<o:p></o:p></span></i></p>
<p class="MsoNormal"><a href="mailto:khartley@geocent.com">khartley@geocent.com</a><span style="color:windowtext"><o:p></o:p></span></p>
<p class="MsoNormal"><a href="http://www.geocent.com">www.geocent.com</a><span style="color:windowtext"><o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span style="color:windowtext"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="color:windowtext">From:</span></b><span style="color:windowtext"> squid-users [mailto:squid-users-bounces@lists.squid-cache.org]
<b>On Behalf Of </b>Yuri<br>
<b>Sent:</b> Thursday, March 22, 2018 5:39 PM<br>
<b>To:</b> squid-users@lists.squid-cache.org<br>
<b>Subject:</b> Re: [squid-users] Squid for windows Very slow downloads of large files through squid with normal uploads<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">22.03.2018 23:10, Keith Hartley пишет:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal">I am using squid 3.5 for windows as a transparent proxy to provide internet access to 7 servers in a secure environment that otherwise does not have internet access. I have two squids running behind a load balancer, each one is running
server 2016 core with 2 Xeon processors that is either haswell generation with 1:1 physical processor to virtual processor mapping or a hyper-threading Broadwell generation processor that is 1:1 logical processor to virtual processor mapping, depending on
how they are provisioned when they get started.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Doing a bandwidth test directly in the VM I am able to get internet throughput of 800-1200 Mbps.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Doing a file copy to and from the VM I am able to get 1200 Mbps lan throughput.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">In proxied uploads I have observed speeds as high as 120 Mbps, which is more than enough for what I need and the bottleneck is likely in the backup software rather than squid. Uploads performance I am not worried about where they are at
now – even if I only got 20-30 Mbps it would be adequate for what I need it for.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Downloads however are very slow. Small files do not seem to be impacted. Using the test a thinkbroadband.com/download, files up to 20 Mb will download at a reasonable 20-30 Mbps, but when I get to 50, it slows down to about 17 Mbps, and
when I download AD Connect from Microsoft, which is about 80 Mb, I can see it start at about 30 Mbps, but eventually goes down to about 115 kbps and levels off. When I put an IP on the server I am using for testing that proxies through squid, I am able to
download the file at several hundred mbps. When I download the same file on the squid server – I can’t tell exactly what throughput I was getting, but the 80 Mb file downloaded within 5 seconds.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">In both squid servers, other than when the servers were booting, processor activity has not exceeded 9% in the last 7 days but usually sits below 2%. Memory usage has not exceeded 2 Gb, leaving 2 Gb free.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">I am using OpenDNS for a DNS source, and have tried changing DNS to level3 but it made no performance difference.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">I think that this may be squid trying to cache something, but had tried to turn all caching off.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">My cache.log doesn’t really have anything interesting in it that I can see. It’s the same ~30 or so log entries each time the service starts, and that is about it. Here it is:
<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Set Current Directory to /var/cache/squid<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Starting Squid Cache version 3.5.27 for x86_64-unknown-cygwin...<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Service Name: squid<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Process ID 1164<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Process Roles: worker<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| With 3200 file descriptors available<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Initializing IP Cache...<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| parseEtcHosts: /etc/hosts: (2) No such file or directory<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| DNS Socket created at [::], FD 5<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| DNS Socket created at 0.0.0.0, FD 6<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Adding nameserver 208.67.222.222 from squid.conf<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Adding nameserver 208.67.220.220 from squid.conf<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Logfile: opening log daemon:/var/log/squid/access.log<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Logfile Daemon: opening log /var/log/squid/access.log<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| WARNING: no_suid: setuid(0): (22) Invalid argument<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Store logging disabled<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Swap maxSize 0 + 262144 KB, estimated 20164 objects<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Target number of buckets: 1008<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Using 8192 Store buckets<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Max Mem size: 262144 KB<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Max Swap size: 0 KB<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Using Least Load store dir selection<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Set Current Directory to /var/cache/squid<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Finished loading MIME types and icons.<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| HTCP Disabled.<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Squid plugin modules loaded: 0<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Adaptation support is off.<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Accepting HTTP Socket connections at local=[::]:3128 remote=[::] FD 10 flags=9<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:28 kid1| storeLateRelease: released 0 objects<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">And this is my squid.conf:<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">#<o:p></o:p></p>
<p class="MsoNormal"># Recommended minimum configuration:<o:p></o:p></p>
<p class="MsoNormal">#<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"># Example rule allowing access from your local networks.<o:p></o:p></p>
<p class="MsoNormal"># Adapt to list your (internal) IP networks from where browsing<o:p></o:p></p>
<p class="MsoNormal"># should be allowed<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">#acl localnet src 10.0.0.0/8 # RFC1918 possible internal network<o:p></o:p></p>
<p class="MsoNormal">#acl localnet src 172.16.0.0/12 # RFC1918 possible internal network<o:p></o:p></p>
<p class="MsoNormal">#acl localnet src 192.168.0.0/16 # RFC1918 possible internal network<o:p></o:p></p>
<p class="MsoNormal">acl localnet src fc00::/7 # RFC 4193 local private network range<o:p></o:p></p>
<p class="MsoNormal">acl localnet src fe80::/10 # RFC 4291 link-local (directly plugged) machines<o:p></o:p></p>
<p class="MsoNormal">acl WSUS src 192.168.225.4/32<o:p></o:p></p>
<p class="MsoNormal">acl BACKUP src 192.168.225.11/32<o:p></o:p></p>
<p class="MsoNormal">acl ADFS src 192.168.224.7/32<o:p></o:p></p>
<p class="MsoNormal">acl ADFS src 192.168.228.8/32<o:p></o:p></p>
<p class="MsoNormal">acl DEVWEB src 192.168.226.6/32<o:p></o:p></p>
<p class="MsoNormal">acl UATWEB src 192.168.226.13/32<o:p></o:p></p>
<p class="MsoNormal">acl PRDWEB src 192.168.226.8/32<o:p></o:p></p>
<p class="MsoNormal">acl PRDWEB src 192.168.226.9/32<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">acl SSL_ports port 443<o:p></o:p></p>
<p class="MsoNormal">acl Safe_ports port 80 # http<o:p></o:p></p>
<p class="MsoNormal">#acl Safe_ports port 21 # ftp<o:p></o:p></p>
<p class="MsoNormal">acl Safe_ports port 443 # https<o:p></o:p></p>
<p class="MsoNormal">#acl Safe_ports port 70 # gopher<o:p></o:p></p>
<p class="MsoNormal">#acl Safe_ports port 210 # wais<o:p></o:p></p>
<p class="MsoNormal">#acl Safe_ports port 1025-65535 # unregistered ports<o:p></o:p></p>
<p class="MsoNormal">#acl Safe_ports port 280 # http-mgmt<o:p></o:p></p>
<p class="MsoNormal">#acl Safe_ports port 488 # gss-http<o:p></o:p></p>
<p class="MsoNormal">#acl Safe_ports port 591 # filemaker<o:p></o:p></p>
<p class="MsoNormal">#acl Safe_ports port 777 # multiling http<o:p></o:p></p>
<p class="MsoNormal">acl CONNECT method CONNECT<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">#<o:p></o:p></p>
<p class="MsoNormal"># Recommended minimum Access Permission configuration:<o:p></o:p></p>
<p class="MsoNormal">#<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"># Only allow cachemgr access from localhost<o:p></o:p></p>
<p class="MsoNormal">#http_access allow localhost manager<o:p></o:p></p>
<p class="MsoNormal">#http_access deny manager<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"># Deny requests to certain unsafe ports<o:p></o:p></p>
<p class="MsoNormal">http_access deny !Safe_ports<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"># Deny CONNECT to other than secure SSL ports<o:p></o:p></p>
<p class="MsoNormal">http_access deny CONNECT !SSL_ports<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"># We strongly recommend the following be uncommented to protect innocent<o:p></o:p></p>
<p class="MsoNormal"># web applications running on the proxy server who think the only<o:p></o:p></p>
<p class="MsoNormal"># one who can access services on "localhost" is a local user<o:p></o:p></p>
<p class="MsoNormal">#http_access deny to_localhost<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">#<o:p></o:p></p>
<p class="MsoNormal"># INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS<o:p></o:p></p>
<p class="MsoNormal">#<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"># Example rule allowing access from your local networks.<o:p></o:p></p>
<p class="MsoNormal"># Adapt localnet in the ACL section to list your (internal) IP networks<o:p></o:p></p>
<p class="MsoNormal"># from where browsing should be allowed<o:p></o:p></p>
<p class="MsoNormal">http_access allow localnet<o:p></o:p></p>
<p class="MsoNormal">http_access allow localhost<o:p></o:p></p>
<p class="MsoNormal">http_access allow WSUS<o:p></o:p></p>
<p class="MsoNormal">http_access allow ADFS<o:p></o:p></p>
<p class="MsoNormal">http_access allow BACKUP<o:p></o:p></p>
<p class="MsoNormal">http_access allow DEVWEB<o:p></o:p></p>
<p class="MsoNormal">http_access allow UATWEB<o:p></o:p></p>
<p class="MsoNormal">http_access allow PRDWEB<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"># And finally deny all other access to this proxy<o:p></o:p></p>
<p class="MsoNormal">http_access deny all<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"># Squid normally listens to port 3128<o:p></o:p></p>
<p class="MsoNormal">http_port 3128<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"># Uncomment the line below to enable disk caching - path format is /cygdrive/<full path to cache folder>, i.e.<o:p></o:p></p>
<p class="MsoNormal">#cache_dir aufs /cygdrive/d/squid/cache 3000 16 256<o:p></o:p></p>
<p class="MsoNormal">cache deny all<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"># Leave coredumps in the first cache dir<o:p></o:p></p>
<p class="MsoNormal">coredump_dir /var/cache/squid<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"># Add any of your own refresh_pattern entries above these.<o:p></o:p></p>
<p class="MsoNormal">refresh_pattern ^ftp: 1440 20% 10080<o:p></o:p></p>
<p class="MsoNormal">refresh_pattern ^gopher: 1440 0% 1440<o:p></o:p></p>
<p class="MsoNormal">refresh_pattern -i (/cgi-bin/|\?) 0 0% 0<o:p></o:p></p>
<p class="MsoNormal">refresh_pattern . 0 20% 4320<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">dns_nameservers 208.67.222.222 208.67.220.220<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">max_filedescriptors 3200<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Does anyone see anything I am missing here?<o:p></o:p></p>
</blockquote>
<p class="MsoNormal">Yes. In your almost default configuration (it is complete squid.conf?) obvious thing is:<br>
<br>
a) You do not use on-disk cache.<br>
b) You use memory cache by default - i.e. 256 Mb. <br>
c) You cache nothing due to deny all cache. So, it makes useless cache_mem default.<br>
d) Your configuration technically useless. I see neither proxying parameters, nor caching. Your squid now only additional hop for files. No more.<br>
<br>
So, squid nothing to do here. It simple should retransmit GET (GET?) request to server, and, without any caching/storing, retransmit it to user.<br>
<br>
Still correct?<br>
<br>
This put us directly to raw network IO. Without any buffering (which can be - but don't - your squid).<br>
<br>
On your place, I can start playing around with cache_mem parameter; of course, only after removing cache deny all.<br>
<br>
And after some experiments, may be, will make <span class="gt-baf-word-clickable">
decision</span> about drop out useless Squid's box.<br>
<br>
Seriously, what role of squid's here? Just setup border firewall to your servers to access it to Internet. It will be enough.<br>
<br>
<br>
<o:p></o:p></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">My access.log doesn’t really have anything interesting in it either, it just looks like it is working normally. I can attach that too if anyone wants to look at it after I redact some of the hosts.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;color:#0072BE">Keith Hartley</span></b><o:p></o:p></p>
<p class="MsoNormal"><i>Network Engineer II</i><o:p></o:p></p>
<p class="MsoNormal"><i>MCSE: Productivity, MCSA: Server 2008, 2012, Office 365 </i>
|<o:p></o:p></p>
<p class="MsoNormal"><i>Certified Meraki Network Associate, Security+</i><o:p></o:p></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt">Geocent, LLC</span></b><o:p></o:p></p>
<p class="MsoNormal"><b><span style="color:#8BC541">o:</span></b><span style="color:#8BC541">
</span>504-405-3578<o:p></o:p></p>
<p class="MsoNormal"><b><span style="color:#8BC541">a:</span></b><span style="color:#8BC541">
</span>2219 Lakeshore drive Ste 300, New Orleans, LA 70122<o:p></o:p></p>
<p class="MsoNormal"><b><span style="color:#8BC541">w:</span></b><span style="color:#8BC541">
</span><a href="http://www.geocent.com/">www.geocent.com</a>|<b><span style="color:#8BC541"> e:</span></b><span style="color:#8BC541">
</span><a href="mailto:khartley@geocent.com">khartley@geocent.com</a><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal"><b><i><u><span style="font-size:8.0pt">Confidentiality Notice:<o:p></o:p></span></u></i></b></p>
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<p class="MsoNormal"><span style="font-size:6.0pt">This email communication may contain confidential information, may be legally privileged, and is intended only for the use of the intended recipients(s) identified. Any unauthorized review, use, distribution,
downloading, or copying of this communication is strictly prohibited. If you are not the intended recipient and have received this message in error, immediately notify the sender by reply email, delete the communication, and destroy all copies. Thank you.<o:p></o:p></span></p>
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<pre>_______________________________________________<o:p></o:p></pre>
<pre>squid-users mailing list<o:p></o:p></pre>
<pre><a href="mailto:squid-users@lists.squid-cache.org">squid-users@lists.squid-cache.org</a><o:p></o:p></pre>
<pre><a href="http://lists.squid-cache.org/listinfo/squid-users">http://lists.squid-cache.org/listinfo/squid-users</a><o:p></o:p></pre>
</blockquote>
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<pre>-- <o:p></o:p></pre>
<pre>"C++ seems like a language suitable for firing other people's legs."<o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre>*****************************<o:p></o:p></pre>
<pre>* C++20 : Bug to the future *<o:p></o:p></pre>
<pre>*****************************<o:p></o:p></pre>
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