mån 2008-04-07 klockan 11:44 +0800 skrev Zhou, Bo(Bram): > 1. How often local host fetch the digest from peers? Each digest_rebuild_period as set by the peer. > Any timer controls or > just checks if the cache digests are expired? Some hard-coded timers, > PeerDigestReqMinGap and GlobDigestReqMinGap in peer_digest.c, are defined in > the source codes, what's purpose of these timers? When will these timers be > started and stopped? These are safeguards to make sure digest fetching doesn't suck up too much bandwidth, in case the peer(s) is badly configured. > 2. For digest_rebuild_chunk_percentage, if I define it 10%, does that mean > Squid will add more 10% cache to digest for each digest_rebuild_period > interval or within digest_rebuild_period interval but finish processing > other user requests? It's how much of the cache Squid should digest at a time when rebuilding the cache digest. No requests is processed while this is done, only very briefly between chunks. Hmm.. not even sure why this directive exists. I think it should scan one bucket at a time.. digest rebuilding is not a very high priority item and blocking request forwarding for this is not good... Alex: do you remember why this directive was added? Regards Henrik
