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Ah, looking more closely at your request. You are wondering if the pre-read list is seen by the proxy. Yes, but it does nothing as we had nothing to hook it to. Implementations are welcome. Look at read(offset, length) which means I want this data here but I don't have anywhere to deliver it to yet. Andy On Tue, 23 Oct 2012, Matevz Tadel wrote: > Hi, > > Is there a way for a client to issue an advisory prefetch request to a > server? > The scenario I have in mind is: > 1. The client knows it will need to access a specific part of the file but > it will take it a while to plow through, with many small read requests. > 2. It suspects (or knows) it is actually talking to a proxy server that > needs to fetch data over WAN. > 3. It knows it will NOT need any other part of the file. > The request would be ignored by normal (non-proxy) servers. > > The use case is populating proxy-cache with known missing blocks from hadoop, > 64 or 128MB in size ... but doing it on demand, when the "broken" file is > actually accessed, and still trying to minimize latency in retrieval. > > Cheers, > Matevz > > ######################################################################## > Use REPLY-ALL to reply to list > > To unsubscribe from the XROOTD-DEV list, click the following link: > https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-DEV&A=1 > ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-DEV list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-DEV&A=1