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zfs vs raid interesantan bench

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Branimir Maksimovic
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icon zfs vs raid interesantan bench19.05.2020. u 12:33 - pre 49 dana i 1h
https://arstechnica.com/gadget...ks-two-filesystems-one-winner/

Citat:

If you're looking for raw, unbridled performance it's hard to argue against a properly-tuned pool of ZFS mirrors. RAID10 is the fastest per-disk conventional RAID topology in all metrics, and ZFS mirrors beat it resoundingly—sometimes by an order of magnitude—in every category tested, with the sole exception of 4KiB uncached reads.


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Nikola Krgović
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icon Re: zfs vs raid interesantan bench19.05.2020. u 22:35 - pre 48 dana i 15h
Los test, jako :

Citat:
When we tested mdadm and ext4, we didn't really use the entire disk—we created a 1TiB partition at the head of each disk and used those 1TiB partitions.
.....
Using these relatively small partitions instead of the entire disks was a practical necessity, since ext4 needs to grovel over the entire created filesystem and disperse preallocated metadata blocks throughout. If we had used the full disks, the usable space on the eight-disk RAID6 topology would have been roughly 65TiB—and it would have taken several hours to format, with similar agonizing waits for every topology tested.

ZFS, happily, doesn't need or want to preallocate metadata blocks—it creates them on the fly as they become necessary instead. So we fed ZFS each 12TB Ironwolf disk in its entirety, and we didn't need to wait through lengthy formatting procedures—each topology, even the largest, was ready for use a second or two after creation, with no special arguments needed.

U sustini, u zavisnosti od toga kako su pravilio to, oni su ili short-stroke-ovali ili long-storke-ovali (ako to postoji) diskove.

tl;dr : Kontaminiran test.
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Branimir Maksimovic
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icon Re: zfs vs raid interesantan bench19.05.2020. u 22:40 - pre 48 dana i 15h
"tl;dr : Kontaminiran test."

Pa nisu hteli da cekaju:
"and it would have taken several hours to format, with similar agonizing waits for every topology tested."

Sto ce reci i ovde zfs dobija :P
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Nikola Krgović
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icon Re: zfs vs raid interesantan bench19.05.2020. u 22:42 - pre 48 dana i 15h
To ne menja cinjenicu da je test los. :)

To sto je covek koji je radio test glup i lenj a ne zlonameran, ne cini da je u pravu.
Please do not feed the Trolls!

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Branimir Maksimovic
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icon Re: zfs vs raid interesantan bench19.05.2020. u 23:05 - pre 48 dana i 14h
Ma zfs je cist zakon. Sun je imao providjenje kad je to pravio. Mislim fs gde raid postavljas jednom prostom komandom :P

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Nikola Krgović
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icon Re: zfs vs raid interesantan bench20.05.2020. u 08:52 - pre 48 dana i 5h
Da se razumemo: ZFS je odlican iz mnogo razloga. Ali OVAJ TEST ne valja. :)

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