I'm testing squid-2.7STABLE9 + COSS + ext4 + SSD now. When enlarge the coss, eg: from 10240 to 20480, I can see success in cache.log, but the coss file on disk did not change, after 3 times of "squid -k reconfigure" the coss file size changed. But some times later, the squid process exited, with nothing left in cache.log. Just once in cache.log I found: 2011/01/12 11:10:04| assertion failed: coss/store_io_coss.c:215: "cs->curstripe < (cs->numstripes - 1)" So, I wondering if resize of coss online is supported perfectly, that we can use it without anxiety. BTW, is shrink of coss filesystem is supported? If it is, do I have to do it online, or offline? By online, I means operates without restart squid process, and the offline means opposite. With squid-2.7STABLE9 + COSS + btrfs + SSD, reload can cause process to stuck, with 100% CPU usage per squid process. I caught these info in cache.log once: 2011/01/09 14:56:44| Killing RunCache, pid 59502 2011/01/09 14:56:44| kill 59502: (1) Operation not permitted And kill of the process will make the process into a zombie. The defunct process still using 100% CPU, which wasn't show in ps. squid75 ~ # ps -eo pid,%cpu,cmd --sort=c 59343 2.7 [squid] <defunct> 59505 2.8 [squid] <defunct> 59380 2.9 [squid] <defunct> 59474 2.9 [squid] <defunct> 42558 3.4 [btrfs-endio-1] 43717 3.7 (squid) -YC -D -f squid73.conf 43925 4.0 (squid) -YC -D -f squid74.conf 42520 4.3 (squid) -YC -D -f squid75.conf 51532 4.4 (squid) -YC -D -f squid77.conf 18014 5.9 (squid) -YC -D -f squid72.conf 19465 7.9 (squid) -YC -D -f squid76.conf 59833 8.9 (squid) -YC -D -f squid79.conf 59803 9.4 (squid) -YC -D -f squid78.conf 59744 9.7 [squid] <defunct> 4511 10.8 (squid) -YC -D -f squid81.conf 4563 10.9 (squid) -YC -D -f squid85.conf 59705 12.0 [squid] <defunct> 4524 12.8 (squid) -YC -D -f squid82.conf 4550 12.9 (squid) -YC -D -f squid84.conf 4537 13.2 (squid) -YC -D -f squid83.conf 4498 29.9 (squid) -YC -D -f squid80.conf squid75 ~ # ps auwx | grep -e defunct -e COMMAND$ USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND squid 59343 2.8 0.0 0 0 ? Z<l Jan07 83:47 [squid] <defunct> squid 59380 3.0 0.0 0 0 ? ZNl Jan07 88:37 [squid] <defunct> squid 59474 3.0 0.0 0 0 ? ZNl Jan07 89:57 [squid] <defunct> squid 59505 2.9 0.0 0 0 ? ZNl Jan07 86:20 [squid] <defunct> squid 59705 12.0 0.0 0 0 ? Z<l Jan07 355:56 [squid] <defunct> squid 59744 9.7 0.0 0 0 ? ZNl Jan07 288:11 [squid] <defunct>
