From mboxrd@z Thu Jan 1 00:00:00 1970 To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net> In-reply-to: Your message of "Thu, 05 Jan 2012 10:07:08 PST." <74f17bd79e5a709683d94e72b4459623@lvoc.net> References: <20120105124852.GA940@polynum.com> <20120105144810.182add7c@wks-ddc.exosec.local> <20120105151518.GB435@polynum.com> <74f17bd79e5a709683d94e72b4459623@lvoc.net> Date: Thu, 5 Jan 2012 10:48:58 -0800 From: Bakul Shah Message-Id: <20120105184858.87B0BB858@mail.bitblocks.com> Subject: Re: [9fans] venti and "contrib": RFC Topicbox-Message-UUID: 5597f51a-ead7-11e9-9d60-3106f5b1d025 On Thu, 05 Jan 2012 10:07:08 PST "John Floren" wrote: > > For reference, I set up our current Plan 9 system about half a year > ago. We have 3.8 TB of Venti storage total. We have used 2.8 GB of > that, with basically no precautions taken to set anything +t; in > general, if it's around at 4 a.m., it's going into Venti. I figure we > have roughly another 2,000 years of storage left at the current rate > :) I first read that "2.8 GB" as 2.8 TB and was utterly confused! You'd save a bunch of energy if you only powered up venti disks once @ 4AM for a few minutes (and on demand when you look at /n/dump). Though venti might have fits! And the disks might too! So may be this calls for a two level venti? First to an SSD RAID and a much less frequent venti/copy to hard disks. venti doesn't have a "scrub" command, does it? zfs scrub was instrumental in warning me that I needed new disks.