Hi Amos, thanks for your reply, i found that there is lots of 206 http responses in store.log, i am wondering if it is possible that one file is downloaded successfully with two 206 partial content, so that Squid can't cache it? 1372991650.893 RELEASE -1 FFFFFFFF 4C7ED6F77157EEE15599812A3CA559F7 206 1372991235 0 1404095235 application/octet-stream 297787296/72302592 GET https://proxy.domain:9443/ccm/service/com.ibm.team.scm.common.IVersionedContentService/content/com.ibm.team.filesystem/FileItem/_pbsCsMEFEeKM4aepnKXERg/_Mp5qpODIEeKxk-h3JWJymg/bRqsAAfsJ2HaJClkCWCY15VspCc3RQ1IUjakTZGC49o Makson -- View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/Big-file-500MB-need-to-be-downloaded-many-times-so-that-it-can-be-cached-tp4660904p4660919.html Sent from the Squid - Users mailing list archive at Nabble.com.