hi , im trying smp and rock , i followed example of http://wiki.squid-cache.org/ConfigExamples/SmpCarpCluster ========================================== the issue is , in squid.conf i have ================================== dns_v4_first on # 3 workers, using worker #1 as the frontend is important workers 3 cpu_affinity_map process_numbers=1,2 cores=1,3 cpu_affinity_map process_numbers=3 cores=5 #cpu_affinity_map process_numbers=3 cores=6 if ${process_number} = 1 include /etc/squid/frontend.conf else include /etc/squid/backend.conf endif ================================ in backend.conf i have : cache_dir rock /rock${process_number} 10000 max-size=32768 swap-timeout=350 the error is FATAL: Ipc::Mem::Segment::open failed to shm_open(/squid-rock4.shm): (2) No such file or directory FATAL: Ipc::Mem::Segment::open failed to shm_open(/squid-rock3.shm): (2) No such file or directory FATAL: Ipc::Mem::Segment::open failed to shm_open(/squid-rock2.shm): (2) No such file or directory but . . . . if i put in backend.conf cache_dir rock /rock1 10000 max-size=32768 swap-timeout=350 cache_dir rock /rock2 10000 max-size=32768 swap-timeout=350 cache_dir rock /rock3 10000 max-size=32768 swap-timeout=350 it work !!!!!! in conclusion , Q1- does that mean that in rock dir , it must be shared between squid processess ??? if not , wt could be the solving of the error FATAL: Ipc::Mem::Segment::open failed to shm_open(/squid-rock3.shm): (2) No such file or directory .... note that using aufs dir , no problems there !! regards ----- Dr.x -- View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/does-rock-type-deny-being-dedicated-to-specific-process-tp4662919.html Sent from the Squid - Users mailing list archive at Nabble.com.