Thanks for a good starting point. tmpfs / unionfs looks promising. Is tmpfs available on this distribution? While doing research on this issue I stumbled across aufs witch looks like the proper way to go. Can aufs be implemented with Vyatta?
On Sun, 25 Nov 2007 17:02:53 +0000 James Chapman <[EMAIL PROTECTED]> wrote: > [EMAIL PROTECTED] wrote: >> I am putting together a new router using VC3 to replace >>a >> Cisco 7507. We no longer need the advanced routing of >>the >> 7507 so I am putting together a basic / high performance >> router. >> >> I have installed VC3 to a CF card as the boot device. my >> thought was that the system would install to a ram disk >>on >> boot-up. This dos not appear to be the case. It looks >>like >> the CF is being accesses after the load. If it were >> assessed in read only mode there would be no concern but >> it seems that the log files are being written to the >>disk. >> This is an issue due to the limited number of >>erase/write >> cycles such devices have before failure. Flash memory >> specifications generally allow 10,000 to 1,000,000 write >> cycles > > The internal wear leveling of SD will increase the life >of the flash to > many more than 1,000,000 writes. However, I agree that >writing log files > and temporary files to flash will shorten flash life. > > Many Embedded Linux products put /var, /tmp, /dev and >sometimes /etc in > RAM using tmpfs / unionfs in order to minimize or >eliminate flash writes > during normal operation. Files written under those >directories would of > course be lost on reboot. But remote syslog could be >used to store the > router's log files on a remote server. Would configuring >remote syslog > eliminate most flash writes? > > An install-time option to put /var, /dev and /tmp into >RAM would be ideal. > > -- > James Chapman > Katalix Systems Ltd > http://www.katalix.com > Catalysts for your Embedded Linux software development > _______________________________________________ Vyatta-users mailing list Vyatta-users@mailman.vyatta.com http://mailman.vyatta.com/mailman/listinfo/vyatta-users
