<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Jun 8, 2016, at 7:37 AM, Martijn Fennis <<a href="mailto:martijn@fennis.tk" class="">martijn@fennis.tk</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="WordSection1" style="page: WordSection1; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">Hi Dale and Jim,</div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">Thanks for your time.</div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">The reason is to store VMs on the Quick-pool and downloads on the Slow-pool.</div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">I would personally not assign the Slow-pool any of my memory, perhaps meta-data.</div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">That’s why i would like to assign the inner part to the slow-pool.<o:p class=""></o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">Also i’ve read about a maximum of 2 TB per slice, anyone?</div></div></div></blockquote><div><br class=""></div><div>For SMI labels, use EFI labels for modern disks.</div><div> </div><blockquote type="cite" class=""><div class=""><div class="WordSection1" style="page: WordSection1; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""></o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">But maybe i should not do the slicing at all?</div></div></div></blockquote><div><br class=""></div><div>You cannot not slice. The only question is whether ZFS creates an EFI label and slice 0 for you,</div><div>or you do that yourself using “format -e” This is purely a convenience feature, there is no other</div><div>science or strategy behind it.</div><div> — richard</div><br class=""><blockquote type="cite" class=""><div class=""><div class="WordSection1" style="page: WordSection1; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">Thanks in advance</div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></span></div><div style="border-style: solid none none; border-top-color: rgb(225, 225, 225); border-top-width: 1pt; padding: 3pt 0cm 0cm;" class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; border: none; padding: 0cm;" class=""><b class="">Van:<span class="Apple-converted-space"> </span></b><a href="mailto:daleg@omniti.com" style="color: rgb(149, 79, 114); text-decoration: underline;" class="">Dale Ghent</a><br class=""><b class="">Verzonden:<span class="Apple-converted-space"> </span></b>woensdag 8 juni 2016 08:21<br class=""><b class="">Aan:<span class="Apple-converted-space"> </span></b><a href="mailto:martijn@fennis.tk" style="color: rgb(149, 79, 114); text-decoration: underline;" class="">Martijn Fennis</a><br class=""><b class="">CC:<span class="Apple-converted-space"> </span></b><a href="mailto:omnios-discuss@lists.omniti.com" style="color: rgb(149, 79, 114); text-decoration: underline;" class="">omnios-discuss@lists.omniti.com</a><br class=""><b class="">Onderwerp:<span class="Apple-converted-space"> </span></b>Re: [OmniOS-discuss] slices & zfs</div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></span></div></div><div class="BodyFragment" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div class="PlainText"><br class="">> On Jun 8, 2016, at 1:00 AM, Martijn Fennis <<a href="mailto:martijn@fennis.tk" style="color: rgb(149, 79, 114); text-decoration: underline;" class="">martijn@fennis.tk</a>> wrote:<br class="">><span class="Apple-converted-space"> </span><br class="">> Hi,<br class="">><span class="Apple-converted-space"> </span><br class="">><span class="Apple-converted-space"> </span><br class="">> Does someone have some info about setting up ZFS on top of slices ?<br class="">><span class="Apple-converted-space"> </span><br class="">> Having 10 drives which i would like to have the outer ring configured @ raid 10 for about 1 TB with dedup, the rest of the drives in Raid 50.<br class="">><span class="Apple-converted-space"> </span><br class="">><span class="Apple-converted-space"> </span><br class="">> What i find on google is to use complete devs and difficult to interpret slicing info..<br class=""><br class="">ZFS is designed to operate with full control of the drive - this means no slicing. Yes, one can use ZFS with slices, but you must first understand why that is not optimal, and what you give up when such a configuration is used.<br class=""><br class="">When consuming a partition on a disk, ZFS can no-longer assume that it has complete control over the entire disk and cannot enable (and proactively manage) the disk's own write caching capabilities. This will incur a performance penalty, the magnitude of which depends on your specific IO patterns.<br class=""><br class="">I am curious why you think you need to slice up your drives like that in such a scheme... the mixing of RAID levels across the same devices seem unwieldy given that ZFS was designed to avoid this kind of scenario, and ZFS will compete with itself because it now is operating 2 pools across the same physical devices, which is absolutely terrible for IO scheduling.<br class=""><br class="">/dale<br class=""></div></div><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">_______________________________________________</span><br style="font-family: Helvetica; font-size: 12px; 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-webkit-nbsp-mode: space; -webkit-line-break: after-white-space; " class=""><br class=""></div><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; " class=""><a href="mailto:Richard.Elling@richardelling.com" class="">Richard.Elling@RichardElling.com</a><br class="">+1-760-896-4422<br class=""><br class=""><br class=""></div></span></div></span></div></span></div></span></div> </div> <br class=""></body></html>