What CPU is required for sustained 1Gb/s RAID-5 writes?

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a13antichrist
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What CPU is required for sustained 1Gb/s RAID-5 writes?

Post by a13antichrist »

HI,
Have for years run my 470 Pro/16G with total satisfaction. I use a 10Gb Mellanox NIC and over the 4x 8tb Ironwolves I get~450Mb/s.

However recently I have begun working with 8K & 11K video and for this, even 400Mb/s is not really sufficient. Since I now need to expand my capacity as well, I figure I might as well replace the base NAS (so as to get the new OS as well) and at the same time ensure I can get the most out of the drives. I'm looking for
I will (presumbaly) use a single NMVe as cache, but since I often work with multi-TB files, I want to get the most out of the SATA capacity as well, since this cache will often be exhausted.

I intend to use 5 spindles initially, adding a 6th up to 8th over time as necessary (so minimum bay support should be 8x 3.5 + 1 or two NVMe). But as I'll begin with 5, I want to be able to get as close to 1Gb/s sustained write over the 5 spindles in RAID-5.

I am assuming that the Marvel 8040 in the 1635AX will not be capable of this? Since it would then make some other models redundant. ;) So I guess I'm looking at things like TVS-1282, TVS-h1688x? Or perhaps there are slightly older models that will give the same capabilities?
Thanks in advance for your inputs :)
TVS-871 @ 58tb formatted R6, Mellanox MCX312b 10Gbe,
R9 5950x || RTX3090 || 64Gb 3600Mhz || Intel X520 10Gbe
MbP M1 Max || 32C GPU || 64Gb || QNAP T310G1S SFP+ 10Gbe
R3 2200G mini HTPC
Mikrotik switches & routers
OpenWRT & DD-WRT wifi
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dolbyman
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Re: What CPU is required for sustained 1Gb/s RAID-5 writes?

Post by dolbyman »

if you want to use a ZFS device, you cannot expand storage later ...so if QuTS, buy all disks from the beginning..and forget cache
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a13antichrist
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Re: What CPU is required for sustained 1Gb/s RAID-5 writes?

Post by a13antichrist »

THanks man - I have been reading a lot of your past posts in various discussions along with famous Bob and others. Understand about the cache - have seen that that won't be factor for my usages.
*Do* I want to run ZFS?

I looked into a few more models. Will 871, 873A will be able to hit ~900Mb/s over 10G NIC?
TVS-871 @ 58tb formatted R6, Mellanox MCX312b 10Gbe,
R9 5950x || RTX3090 || 64Gb 3600Mhz || Intel X520 10Gbe
MbP M1 Max || 32C GPU || 64Gb || QNAP T310G1S SFP+ 10Gbe
R3 2200G mini HTPC
Mikrotik switches & routers
OpenWRT & DD-WRT wifi
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dolbyman
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Re: What CPU is required for sustained 1Gb/s RAID-5 writes?

Post by dolbyman »

Bob seems to be very happy with QuTS units (I might get one next year...I will see) and ZFS, but they sadly have the expansion limitation but they have upsides like much faster rebuild on disk swap and buildin depuplication (might be usefull if you deal with repeating project assets)

If slow growth is a MUST have feature, I would look at a unit with QTS (now) and QuTS (later)

The 873A should reach speeds around your target mark (My lower power 853BU is not far off)
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a13antichrist
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Re: What CPU is required for sustained 1Gb/s RAID-5 writes?

Post by a13antichrist »

If slow-growth wasn't available then I wouldn't bother with a larger unit I guess - storage only ever gets cheaper over time so it makes no sense to max out drives at any point where it's not strictly required for your particular purposes. So it seems ZFS wouldn't be of any real practical value -except- when you're buying a large unit with enough space to add a 2nd array alongside the first, instead of expanding the first. And I guess once you get to 7-8 drives and should migrate to RAID-6 anyway then the parity sacrifice results in basically no capacity difference between these two options. Just loss of flexibility in -when-/how often you can add extra capacity.

Frequent rebuild & dedup are not features I'll benefit from so it's looking like ZFS holds no benefit in my case.

Is it a requirement to use ZFS on QuTS? or standard RAID is still possible? I do like the idea of a 12-bay with vast expansion capacity but if the 873A (with the added bonus of supporting AMD rather than the blue team :D ) can max out the 10G card then is there still any reason consider spending 3x the amount for the *88x?
TVS-871 @ 58tb formatted R6, Mellanox MCX312b 10Gbe,
R9 5950x || RTX3090 || 64Gb 3600Mhz || Intel X520 10Gbe
MbP M1 Max || 32C GPU || 64Gb || QNAP T310G1S SFP+ 10Gbe
R3 2200G mini HTPC
Mikrotik switches & routers
OpenWRT & DD-WRT wifi
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dolbyman
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Re: What CPU is required for sustained 1Gb/s RAID-5 writes?

Post by dolbyman »

QuTS is locked to ZFS I am afraid ..yes
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a13antichrist
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Re: What CPU is required for sustained 1Gb/s RAID-5 writes?

Post by a13antichrist »

ok thanks :)
TVS-871 @ 58tb formatted R6, Mellanox MCX312b 10Gbe,
R9 5950x || RTX3090 || 64Gb 3600Mhz || Intel X520 10Gbe
MbP M1 Max || 32C GPU || 64Gb || QNAP T310G1S SFP+ 10Gbe
R3 2200G mini HTPC
Mikrotik switches & routers
OpenWRT & DD-WRT wifi
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