Hi I burnt up 172G of download in 24 hours with multi machines doing the download of the same file (MS SQL patch) I think I am running into the same issue So multiple machines are trying to do the download... Q) why don't they share the same download ! 1452459804.945 64052 10.172.208.108 TCP_MISS/206 1727799 GET http://wsus.ds.download.windowsupdate.com/d/msdownload/update/software/svpk/2015/05/sqlserver2014sp1-kb3058865-x64-enu_2c84e2ebd0d3cb4980a3a1a80d79fd7520405626.exe - HIER_DIRECT/150.101.195.217 application/octet-stream 1452459868.272 63326 10.172.208.108 TCP_MISS/206 1312208 GET http://wsus.ds.download.windowsupdate.com/d/msdownload/update/software/svpk/2015/05/sqlserver2014sp1-kb3058865-x64-enu_2c84e2ebd0d3cb4980a3a1a80d79fd7520405626.exe - HIER_DIRECT/150.101.195.217 application/octet-stream 1452459933.336 65061 10.172.208.108 TCP_MISS/206 1155440 GET http://wsus.ds.download.windowsupdate.com/d/msdownload/update/software/svpk/2015/05/sqlserver2014sp1-kb3058865-x64-enu_2c84e2ebd0d3cb4980a3a1a80d79fd7520405626.exe - HIER_DIRECT/150.101.195.217 application/octet-stream 1452459998.406 65067 10.172.208.108 TCP_MISS/206 1022158 GET http://wsus.ds.download.windowsupdate.com/d/msdownload/update/software/svpk/2015/05/sqlserver2014sp1-kb3058865-x64-enu_2c84e2ebd0d3cb4980a3a1a80d79fd7520405626.exe - HIER_DIRECT/150.101.195.217 application/octet-stream 1452460066.455 68046 10.172.208.108 TCP_MISS/206 2006058 GET http://wsus.ds.download.windowsupdate.com/d/msdownload/update/software/svpk/2015/05/sqlserver2014sp1-kb3058865-x64-enu_2c84e2ebd0d3cb4980a3a1a80d79fd7520405626.exe - HIER_DIRECT/150.101.195.200 application/octet-stream 1452460134.536 68078 10.172.208.108 TCP_MISS/206 1575462 GET http://wsus.ds.download.windowsupdate.com/d/msdownload/update/software/svpk/2015/05/sqlserver2014sp1-kb3058865-x64-enu_2c84e2ebd0d3cb4980a3a1a80d79fd7520405626.exe - HIER_DIRECT/150.101.195.200 application/octet-stream 1452460204.180 69643 10.172.208.108 TCP_MISS/206 1387948 GET http://wsus.ds.download.windowsupdate.com/d/msdownload/update/software/svpk/2015/05/sqlserver2014sp1-kb3058865-x64-enu_2c84e2ebd0d3cb4980a3a1a80d79fd7520405626.exe - HIER_DIRECT/150.101.195.217 application/octet-stream here you can see multiple requests for the same file . I am presuming 206 is a partial download - is that Windows or SQUID .. I presume windows client So is it the byte range that gets cached. if client a want 100 - 200 of file X and client B wants 50 - 150.. will squid reuse whatever has been downloaded of the 100-200 request by client B any way I can for the requests to a single file - I could manually download the file once, that would place it in the cache. I have this in my config # http://wiki.squid-cache.org/SquidFaq/WindowsUpdate range_offset_limit 200 MB maximum_object_size 200 MB quick_abort_min -1 refresh_pattern -i microsoft.com/.*\.(cab|exe|ms[i|u|f]|[ap]sf|wm[v|a]|dat|zip) 4320 80% 43200 reload-into-ims refresh_pattern -i windowsupdate.com/.*\.(cab|exe|ms[i|u|f]|[ap]sf|wm[v|a]|dat|zip) 4320 80% 43200 reload-into-ims refresh_pattern -i windows.com/.*\.(cab|exe|ms[i|u|f]|[ap]sf|wm[v|a]|dat|zip) 4320 80% 43200 reload-into-ims guessing I have to bump up the 200M max to 800mb. are the other values still okay ? A _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx http://lists.squid-cache.org/listinfo/squid-users