Eyal Traitel wrote:
Bennett, let's be more explicit:
It takes about 2 min. to boot, probably starting to answer NFS calls a little bit earlier (it depends on your networking config - if you use trunking, it takes a few seconds to setup the trunk). The 5 minutes is if there's writing of a core file. I don't believe that generic server with big memory that crashes will take less to write its core file also (you can choose not to write a corefile, but this is probably unwise). Anyway, let's not forget that even if it is 5 minutes with core, a generic server crash will take longer to boot for replaying journaling, which the filer needs only a few seconds for.
Does anyone have numbers for generic server boot times ?
I've never done any real timing but we have an E450 with Solaris 2.6, 4*250MHz, 4GB of memory, 40*18GB drives in 4 shelves connected to 2 FCAL loops. We use disksuite to mirror and log the disks.
Without a crash dump the system takes a couple of minutes to reboot, looking at the last printout I would guess that it takes around 3 minutes. With a crash dump it would take I guess about 30 seconds more, of course one's sense of time isn't that accurate while waiting for a large server to reboot. It takes longer from cold start due to te POST but IIRC we had an outage of 15 minutes when I increased the memory, i.e. take the machine down, open it, install the memory, close it and boot up.
/Michael