jackk@shasta.Stanford.EDU (jackk) (07/14/90)
In article <AGLEW.90Jul13165855@oberon.crhc.uiuc.edu> aglew@oberon.crhc.uiuc.edu (Andy Glew) writes: > A few years ago a customer gave us a <30 second boot after power >cycle requirement, for a real-time OS. They wanted <10. > >This DECstation 3100, with 16MB of memory, and an approximately 300Mb >local SCSI disk, took 8:19 (eight minutes and nineteen seconds) to >reboot after powercycle. That included fsck'ing the disk. Time >measured from the time I flicked the switch to the time I could log >in. > >That may be good by UNIX standards, but it's not great. Do you want The Journaling File System of AIX v 3 (the operating system for IBM's RS/6000 workstation) avoids the long fsck times at reboot by using techniques similar to those used to recover database transactions. FSCK times can become prohibitively long as workstations begin to attach many gigabytes of storage. Jack