Re: [OmniOS-discuss] HGST 7K6000 for a RAIDZ2 pool
Today Tobias Oetiker wrote: > Hi Marts, > > Yesterday Warren Marts wrote: > > > At some point sourcing true 512 B/sector disks will get more difficult and > > expensive - unless you knew this filesystem is likely to see lots of small > > writes and performance or space efficiency are critical I'd lean to the 4KB > > sector disks. > > Amazingly, the new He6 drives from HGST only seem to exist in an > 512n variant ... while the also new He8 drives only come in 4Kn and > 512e types ... also while on the subject, there is https://github.com/zfsonlinux/zfs/issues/548 https://github.com/zfsonlinux/zfs/issues/1807 which would indicate that using 512n is probably a better choice in an environment where we are using zvol a lot cheers tobi > > > > On Wed, Feb 25, 2015 at 4:39 PM, Richard Elling < > > richard.ell...@richardelling.com> wrote: > > > > > > > > > On Feb 25, 2015, at 3:17 PM, Tobias Oetiker wrote: > > > > > > > > experts! > > > > > > > > If you were to buy 6TB disks for a RAIDZ2 Pool, would you go for > > > > 512n like in the olden days, or use the new 4Kn. > > > > > > > > I know ZFS can deal with both ... > > > > > > > > So what would be your choice, and WHY? > > > > > > Better yet, what would be your requirements, then your choice, then why? > > > -- richard > > > > > > > > > > > cheers > > > > tobi > > > > > > > > -- > > > > Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland > > > > www.oetiker.ch t...@oetiker.ch +41 62 775 9902 > > > > > > > > ___ > > > > OmniOS-discuss mailing list > > > > OmniOS-discuss@lists.omniti.com > > > > http://lists.omniti.com/mailman/listinfo/omnios-discuss > > > > > > ___ > > > OmniOS-discuss mailing list > > > OmniOS-discuss@lists.omniti.com > > > http://lists.omniti.com/mailman/listinfo/omnios-discuss > > > > > > > -- Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland www.oetiker.ch t...@oetiker.ch +41 62 775 9902 ___ OmniOS-discuss mailing list OmniOS-discuss@lists.omniti.com http://lists.omniti.com/mailman/listinfo/omnios-discuss
Re: [OmniOS-discuss] HGST 7K6000 for a RAIDZ2 pool
Hi Marts, Yesterday Warren Marts wrote: > At some point sourcing true 512 B/sector disks will get more difficult and > expensive - unless you knew this filesystem is likely to see lots of small > writes and performance or space efficiency are critical I'd lean to the 4KB > sector disks. Amazingly, the new He6 drives from HGST only seem to exist in an 512n variant ... while the also new He8 drives only come in 4Kn and 512e types ... > On Wed, Feb 25, 2015 at 4:39 PM, Richard Elling < > richard.ell...@richardelling.com> wrote: > > > > > > On Feb 25, 2015, at 3:17 PM, Tobias Oetiker wrote: > > > > > > experts! > > > > > > If you were to buy 6TB disks for a RAIDZ2 Pool, would you go for > > > 512n like in the olden days, or use the new 4Kn. > > > > > > I know ZFS can deal with both ... > > > > > > So what would be your choice, and WHY? > > > > Better yet, what would be your requirements, then your choice, then why? > > -- richard > > > > > > > > cheers > > > tobi > > > > > > -- > > > Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland > > > www.oetiker.ch t...@oetiker.ch +41 62 775 9902 > > > > > > ___ > > > OmniOS-discuss mailing list > > > OmniOS-discuss@lists.omniti.com > > > http://lists.omniti.com/mailman/listinfo/omnios-discuss > > > > ___ > > OmniOS-discuss mailing list > > OmniOS-discuss@lists.omniti.com > > http://lists.omniti.com/mailman/listinfo/omnios-discuss > > > -- Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland www.oetiker.ch t...@oetiker.ch +41 62 775 9902 ___ OmniOS-discuss mailing list OmniOS-discuss@lists.omniti.com http://lists.omniti.com/mailman/listinfo/omnios-discuss
Re: [OmniOS-discuss] HGST 7K6000 for a RAIDZ2 pool
At some point sourcing true 512 B/sector disks will get more difficult and expensive - unless you knew this filesystem is likely to see lots of small writes and performance or space efficiency are critical I'd lean to the 4KB sector disks. On Wed, Feb 25, 2015 at 4:39 PM, Richard Elling < richard.ell...@richardelling.com> wrote: > > > On Feb 25, 2015, at 3:17 PM, Tobias Oetiker wrote: > > > > experts! > > > > If you were to buy 6TB disks for a RAIDZ2 Pool, would you go for > > 512n like in the olden days, or use the new 4Kn. > > > > I know ZFS can deal with both ... > > > > So what would be your choice, and WHY? > > Better yet, what would be your requirements, then your choice, then why? > -- richard > > > > > cheers > > tobi > > > > -- > > Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland > > www.oetiker.ch t...@oetiker.ch +41 62 775 9902 > > > > ___ > > OmniOS-discuss mailing list > > OmniOS-discuss@lists.omniti.com > > http://lists.omniti.com/mailman/listinfo/omnios-discuss > > ___ > OmniOS-discuss mailing list > OmniOS-discuss@lists.omniti.com > http://lists.omniti.com/mailman/listinfo/omnios-discuss > ___ OmniOS-discuss mailing list OmniOS-discuss@lists.omniti.com http://lists.omniti.com/mailman/listinfo/omnios-discuss
Re: [OmniOS-discuss] HGST 7K6000 for a RAIDZ2 pool
> On Feb 25, 2015, at 3:17 PM, Tobias Oetiker wrote: > > experts! > > If you were to buy 6TB disks for a RAIDZ2 Pool, would you go for > 512n like in the olden days, or use the new 4Kn. > > I know ZFS can deal with both ... > > So what would be your choice, and WHY? Better yet, what would be your requirements, then your choice, then why? -- richard > > cheers > tobi > > -- > Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland > www.oetiker.ch t...@oetiker.ch +41 62 775 9902 > > ___ > OmniOS-discuss mailing list > OmniOS-discuss@lists.omniti.com > http://lists.omniti.com/mailman/listinfo/omnios-discuss ___ OmniOS-discuss mailing list OmniOS-discuss@lists.omniti.com http://lists.omniti.com/mailman/listinfo/omnios-discuss
Re: [OmniOS-discuss] HGST 7K6000 for a RAIDZ2 pool
On Thu, 26 Feb 2015 00:17:35 +0100 (CET) Tobias Oetiker wrote: > experts! > > If you were to buy 6TB disks for a RAIDZ2 Pool, would you go for > 512n like in the olden days, or use the new 4Kn. > > I know ZFS can deal with both ... > > So what would be your choice, and WHY? > I would try to analyze the expected workload. Writing in small chunks points at 512n while large chunks points towards 4Kn. Small chunks on 4Kn will waste a lot of space. If all else is equal the performance should be the same. IMHO. -- Hilsen/Regards Michael Rasmussen Get my public GnuPG keys: michael rasmussen cc http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xD3C9A00E mir datanom net http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xE501F51C mir miras org http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xE3E80917 -- /usr/games/fortune -es says: To have died once is enough. -- Publius Vergilius Maro (Virgil) pgpR1mYMRKuOp.pgp Description: OpenPGP digital signature ___ OmniOS-discuss mailing list OmniOS-discuss@lists.omniti.com http://lists.omniti.com/mailman/listinfo/omnios-discuss
[OmniOS-discuss] HGST 7K6000 for a RAIDZ2 pool
experts! If you were to buy 6TB disks for a RAIDZ2 Pool, would you go for 512n like in the olden days, or use the new 4Kn. I know ZFS can deal with both ... So what would be your choice, and WHY? cheers tobi -- Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland www.oetiker.ch t...@oetiker.ch +41 62 775 9902 ___ OmniOS-discuss mailing list OmniOS-discuss@lists.omniti.com http://lists.omniti.com/mailman/listinfo/omnios-discuss
