4 ms·

Corrected, the NAS is 18TB, in the workstation the disks are RAID0 for fast scratch (creating and destroying virtual machines).

by buro9 13y ago

pedrocr 13y ago
Cool. How do you get to 18TB RAID6? 8 3TB drives? 11 2TB? What hardware/OS are you using for that?
- buro9 13y ago
  8 x 3TB in one of these: http://www.qnap.com/uk/index.php?lang=en-uk&sn=5050&c=2485&sc=2491&t=2765&n=20221 http://www.qnap.com/uk/index.php?lang=en-uk&sn=5050&c=2485&s... The NAS, whilst it is feature rich, I've disabled everything other then full-disk encryption. The only thing running on it is Squeezebox: http://oinkzwurgl.org/ssods_intro http://oinkzwurgl.org/ssods_intro
  - pedrocr 13y ago
    Interesting, thanks. I originally got a 4 drive QNAP but it's way too limited in terms of CPU, it couldn't keep up with rsync+ssh transfers. I ended up replacing it with a HP microserver and am very happy with it. So far 4 drives in RAID6 have been enough but it would be nice to have versions with more drives. I guess I could fit a 5th drive in the optical drive slot. Edit: I see that these Pro QNAP versions are actually high-specced and high-priced Intel machines. The HP microservers still hit a sweet spot of low price and ECC ram though. QNAP must be making a bundle by effectively differentiating themselves in their software. Nothing in the hardware seems to justify the pricing.
    - joshka 13y ago
      I'm on a N40L and found that FDE taxed the CPU too much underneath a RAID 6 array to be useful. I've heard that the more recent models are CPU upgradable to CPUs with AES-NI. What sort of FDE R/W speeds are you seeing?
      - pedrocr 13y ago
        I don't use encryption. I just checked my munin graphs and the CPU sits ~90% idle, and this is on a N36L, I guess the newer N56L would be better. It seems the newer generation has moved to Intel but still without AES-NI: https://ssl.www8.hp.com/us/en/products/proliant-servers/product-detail.html?oid=5366896#!tab=specs https://ssl.www8.hp.com/us/en/products/proliant-servers/prod... It's not clear from what I've read if you can swap the processor out. Why do you run FDE? How do you boot it?
        joshka 13y ago
        I don't run FDE, because it's too slow to do so (by around 1 order of magnitude IIRC). See http://b3n.org/installed-xeon-e3-1230v2-in-gen8-hp-microserver/ http://b3n.org/installed-xeon-e3-1230v2-in-gen8-hp-microserv... for info on how to do the chip upgrades in the current model.
        pedrocr 13y ago
        Looks straightforward. Why would you want FDE in this context?

Corrected, the NAS is 18TB, in the workstation the disks are RAID0 for fast scratch (creating and destroying virtual machines).

by buro9 13y ago

Corrected, the NAS is 18TB, in the workstation the disks are RAID0 for fast scratch (creating and destroying virtual machines).

pedrocr 13y ago

Cool. How do you get to 18TB RAID6? 8 3TB drives? 11 2TB? What hardware/OS are you using for that?

buro9 13y ago
8 x 3TB in one of these: http://www.qnap.com/uk/index.php?lang=en-uk&sn=5050&c=2485&sc=2491&t=2765&n=20221 http://www.qnap.com/uk/index.php?lang=en-uk&sn=5050&c=2485&s... The NAS, whilst it is feature rich, I've disabled everything other then full-disk encryption. The only thing running on it is Squeezebox: http://oinkzwurgl.org/ssods_intro http://oinkzwurgl.org/ssods_intro
- pedrocr 13y ago
  Interesting, thanks. I originally got a 4 drive QNAP but it's way too limited in terms of CPU, it couldn't keep up with rsync+ssh transfers. I ended up replacing it with a HP microserver and am very happy with it. So far 4 drives in RAID6 have been enough but it would be nice to have versions with more drives. I guess I could fit a 5th drive in the optical drive slot. Edit: I see that these Pro QNAP versions are actually high-specced and high-priced Intel machines. The HP microservers still hit a sweet spot of low price and ECC ram though. QNAP must be making a bundle by effectively differentiating themselves in their software. Nothing in the hardware seems to justify the pricing.
  - joshka 13y ago
    I'm on a N40L and found that FDE taxed the CPU too much underneath a RAID 6 array to be useful. I've heard that the more recent models are CPU upgradable to CPUs with AES-NI. What sort of FDE R/W speeds are you seeing?
    - pedrocr 13y ago
      I don't use encryption. I just checked my munin graphs and the CPU sits ~90% idle, and this is on a N36L, I guess the newer N56L would be better. It seems the newer generation has moved to Intel but still without AES-NI: https://ssl.www8.hp.com/us/en/products/proliant-servers/product-detail.html?oid=5366896#!tab=specs https://ssl.www8.hp.com/us/en/products/proliant-servers/prod... It's not clear from what I've read if you can swap the processor out. Why do you run FDE? How do you boot it?
      - joshka 13y ago
        I don't run FDE, because it's too slow to do so (by around 1 order of magnitude IIRC). See http://b3n.org/installed-xeon-e3-1230v2-in-gen8-hp-microserver/ http://b3n.org/installed-xeon-e3-1230v2-in-gen8-hp-microserv... for info on how to do the chip upgrades in the current model.
        pedrocr 13y ago
        Looks straightforward. Why would you want FDE in this context?