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13:45:24  <bixu>I have some questions about the zpool configuration of the Manta 'mantis shrimp' storage nodes...
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14:26:52  <rmustacc>bixu: What about it?
14:27:25  <bixu>Is it RAIDZ1 or 2 and how many pools?
14:27:45  <rmustacc>I'm happy to answer, but let me ask a different question first, why does it matter?
14:28:26  <rmustacc>Just curiosity or something more?
14:29:37  <rmustacc>And wesolow's blog has some details on what we do, though I don't recall if it answers all of your questions: http://dtrace.org/blogs/wesolows/2013/06/25/manta-what-lies-beneath/
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15:07:59  <bixu>I'm calculating potential cost of storage density for different setups, and wanted know what you guys are doing for very high-density installs.
15:08:39  <bixu>Assuming that you already did MTBF calculations, etc.
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15:11:42  <bixu>I need to decide between several options, including the possibility of a private Manta install.
15:16:54  <nahamu>private Manta is clearly the right solution... :-P
15:17:41  <rmustacc>I'll have to get the exact stripe/spare count later. I don't recall it off the top of my head, but it's a single pool. Doing anything else is usually pointless.
15:19:44  <bixu>rmustacc: Thanks. Stripe/spare setup is what I'm after. If only I could see that stuff from an mlogin session (hehe).
15:21:03  <rmustacc>Well, you can just take the number of disks and feed it into disklayout yourself.
15:21:14  <rmustacc>The amount of disks is all on the public BOMs.
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15:22:28  <bixu>Pardon my ignorance. What's disklayout?
15:24:23  <nahamu>http://www.kdump.cn/forums/viewtopic.php?pid=3367#p3367
15:24:44  <bixu>Ohhh.
15:24:54  <nahamu>disklayout is the tool that SDC uses to calculate the pool layout when a compute node is being configured.
15:24:54  <bixu>Dankeschön.
15:25:00  <nahamu>it uses the output from diskinfo
15:26:13  <rmustacc>http://smartos.org/man/1m/disklayout
15:26:14  <nahamu>if you have a SmartOS GZ from which to get some sample diskinfo output you can hack up a fake input that would mimic the Mantis Shrimp's disks
15:27:00  <nahamu>rmustacc: the man pages for diskinfo and disklayout would be greatly improved by having some mention of "diskinfo -Hp | disklayout" or whatever.
15:27:03  <bixu>Thank goodness for @sax's smartos/vagrant work :)
15:31:00  <bixu>https://github.com/sax/vagrant-smartos-packager
15:34:30  <bixu>disklayout is great
15:34:33  <bixu>thanks for the tip
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