Hi! On Fri, 12 Sep 2003 14:47:04 -0600 (MDT) "Jacob Anawalt" <[EMAIL PROTECTED]> wrote: > Tom Allison said: > > Jacob Anawalt wrote: > >> Joachim Förster said: > >> > >>>Does anybody know, why squid uses the harddisk although its (empty disk > >>>cache, logs and other status files are on the tmpfs)? > >>> > >> I don't know why it uses the hard disk, but if it is only reading those > >> files and there is enough memory that they are cached in the kernel file > >> cache, then perhaps the atime is being updated and that is causing the > >> disk to spin up? > >> > >> Are you mounting with the noatime option? > >> > >> Maybe there's another http proxy that doesn't require any disk access? > >> > >> I am interested in following this thread. I would like to set up a > >> similar > >> computer, with as few fans and spinning drives (zero would be ideal) as > >> possible while staying inexpensive and low-power. > >>
> For me, squid disk access while someone on my internal network is using > the proxy is not an issue. If squid were spinning up the drive when > 'nothing'* is happening, calling sync()/fsync() for some odd reason then > that would be annoying. I'm running a gateway w/ squid right now, but I > haven't tried to stop the disk from spinning when squid is running. Well, in the end I in fact want to have a PC without spinning up the disk at all, even when somebody is using it. When somebody is using sshd it whould be OK, but the use of dhcpd, squid*, isdnutils, dnsmasq should not bring up the disk. *squid only with RAM cache, no disk cache! > I am unclear from Joachim's email if Squid is spinning up the disk all the > time for him, every x seconds, or only when the proxy is being used. If > it's only the latter then for my needs that's OK. Sorry, for me squid is spinning up the disk all the time, even when not in use. > It still seems odd if writes are spinning up the drive with the read only > setting. Maybe some file squid wants to read keeps being dropped from file > cache between accesses because other programs or more frequently accessed > files are using all the memory? (Ie, because squid is set to use XMb in > memory, is there still enough free memory to cache all the files squid > wants to read. Add to that all other running program's requirements.) I don't know. I moved the whole /var and /tmp things of squid to a tmpfs, so the files are in memory? > the site. Joachim, you could try LRP, but load everything into memory from > your hd instead of from a floppy. Hmmm, have to try it out ... > noflushd seems to be a good step in that direction. I'll try it out. > Thanks for mentioning it in the first post. I've read more about it and > see that it's suppose to buffer those atime writes, so sorry about that > bad guess. noflushd works - but I had to change the values in /proc/sys/vm/bdflush, too, to keep the disk silent for a longer time than just a few minutes. I haven't tried it yet, but I think the noatime option may be good anyway - in "addition" to noflushd ... Thanks, Joachim -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
