Hi! If I configure more than 3 rock stores, I get the following cache.log entry and squid is stopped abnormally: Squid Cache (Version 3.3.8-20130816-r12602): Terminated abnormally. FATAL: Ipc::Mem::Segment::open failed to shm_open(/squid-squid-page-pool.shm): (2) No such file or directory Squid Cache (Version 3.3.8-20130816-r12602): Terminated abnormally. Another bug is that WCCP does not work when using "wccp2_rebuild_wait on", while having rock stores. I think squid is not sending "Here I AM" message to the WCCP router as the router does not show any WCCP clients! My questions are: 1- Is it important to use "wccp2_rebuild_wait on"? Will there be any bad results, if I set this directive to off? 2- I'm only using one squid worker, so will using rock stores to cache files less than 32 KB still give any performance improvements over using aufs stores for such files? Thanks! Firas