On 2016-11-19 14:33, Carlos E. R. wrote:
On 2016-11-19 00:05, Greg Freemyer wrote:
I know someone that is an expert on this (it is his job), perhaps he is reading. I'll ping him, just in case ;-)
Well, he no longer reads this list, too busy, but he gave me some ideas, which I'll translate to English here. First, run away from complexities, the simplest solution can be the best. Don't be led by the bells and whistles you read on internet. He says he still prefers ZFS because it does CRC of data blocks on disk, so that it ensures that data is properly stored. Also it allows for deduplication. The snag is it uses a lot of RAM. Another question is when and how much do you intend to grow? Instead of LVM it can be worth to migrate the hard disk to another one, more modern at the time and bigger. Ie, buy 10 T now, perhaps 20 TB later. Perhaps SSD then. (re RAID) Another thing to take into account is a filesystem that allows to create only lost blocks. IOW, a hardware raid recreates the entire hard disk regardless of what is actually in use. 1 TB takes about 24 hours to replicate. So 10 days for a 10 TB disk. ZFS allows to rebuild only those blocks that contained data, thus faster than a traditional HW raid. Another thing to take into account is that if you use HW RAID and LVM on top, expanding it costs big money (also with ZFS), because you can not simply add a disk, you need an entire RAID. If you want something simple and fast; 2 * 10 TB HDs in a (cheap) server, and ZFS doing mirror (RAID 1) between both. When expanding: connect 2 new (bigger) hard disks in raid 1 and migrate the entire thing. That is what he said, quick translation. :-) -- Cheers/Saludos Carlos E. R. (testing openSUSE Leap 42.2, at Minas-Anor) -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org