First of all thanks for: James Noyes <jnoyes-sml@retrogeeks.com> Steve Mickeler <steve@neptune.ca> Darren Dunham <ddunham@taos.com> chipman@ecopiabio.com "henrik huhtinen" <henrik.huhtinen@appelsiini.com> "Riddoch, John E SITI-ITDSEP3" <John.E.Riddoch@is.shell.com> Christophe Dupre <duprec@scorec.rpi.edu> The summary for each question follow bellow. "Huang S. Yann" wrote: > > UFS logging is the process of recording UFS updates in a log before the > updates are applied to the UNIX file system. Using UFS logging (trans > metadevices) in a large file system it's recommended. If a server reboot > after a failure, we don't need to run fsck on file systems. The > "Solstice DiskSuite 4.2.1 User's Guide" shows, starting on page 91, how > to create trans metadevices in a simple steps. > > Another way to do ufs logging is using the mount option logging in > /etc/vfstab. > > My questions: > > 1) Which of them is the better and why? Both types of logging option will suffer on a file system with intensive write. In this case, the disksuite option is better, because you can use the logging device in another disk and controler. The mount option logging (/etc/vfstab) is available in Solaris 7 or Solaris 8, and it's easier to use. For older Solaris the option is from disksuite. The file system / (root) can't be logged with disksuite, but it can be logged with mount option. > > 2) The trans metadevice is formed by two devices (master device and > logging device). The master contains the file system that is being > logged, and the logging device contains the log. When I use the logging > option in /etc/vfstab, where the log is stored? In the free space of the filesystem. Sized approximately 1Mb per 1Gb of file system, up to a maximum of 64Mb. > > 3) Can I use the mount option logging in /etc/vfstab over metadevices? Yes. > > Thanks in advance, > > Yann > > -- > H. S. Yann > yann@veritel.com.br > System & Network Administrator > VeritelNet > _______________________________________________ > sunmanagers mailing list > sunmanagers@sunmanagers.org > http://www.sunmanagers.org/mailman/listinfo/sunmanagers -- H. S. Yann yann@veritel.com.br System & Network Administrator VeritelNet _______________________________________________ sunmanagers mailing list sunmanagers@sunmanagers.org http://www.sunmanagers.org/mailman/listinfo/sunmanagersReceived on Mon Feb 18 13:31:18 2002
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