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DiTBho:

--- Quote from: paulca on June 02, 2023, 10:52:42 am ---SAS arrays or "rack local" SAS arrays.

--- End quote ---

got it from the last dumpster dive:
      SAS, 2 channels(1) ------ fiber optic bridge ------ fiber optic HBA

is it like this?

(1)
ch0: { disk0,disk1,disk2,disk4 } on one cable
ch1: { disk0,disk1,disk2,disk4 } on one cable


... why not Infiniband?  :o :o :o

ve7xen:
I am using btrfs for more or less all my personal stuff for 5ish years. I have had no major issues with it, though obviously it is a small sample size.

On desktops, doing frequent more or less 'free' snapshots both periodically and before system updates has been very valuable, and this is not something that is well supported with 'traditional' filesystems. ZFS support on Linux has always felt quite half-baked to me, and most distros have good support for btrfs built in these days, from bootloader through to snapshotting tools and hooks. I am not too interested in using something 'bolt-on', even if it works well.

On my personal servers, I find piping incremental snapshots around to be an elegant solution to the incremental backup issue. For my personal long-term archives I also insist on a filesystem with data (and metadata) checksumming and scrubbing, which again means choosing between two half-baked options, but btrfs feels by far the more Linux-native.

At $dayjob we are using ext4 for general workloads and XFS for dedicated storage workloads. I have in the long-distant past experienced an XFS data loss incident, so haven't used it on my personal stuff in a decade or more.


--- Quote from: SiliconWizard on May 22, 2023, 08:06:11 pm ---One "downside" to XFS is that, while it has a 'discard' option, it apparently hinders performance quite a bit, so if on a SSD, they recommend disabling this option and issuing fstrim separately.
ext4 handles this much better.

--- End quote ---

This is generally the best-practice advice these days anyway, so I wouldn't really count it against XFS.

SiliconWizard:

--- Quote from: ve7xen on June 02, 2023, 08:12:10 pm ---This is generally the best-practice advice these days anyway, so I wouldn't really count it against XFS.

--- End quote ---

You're right. That's how I set up my workstation lately in the end, even with ext4.

Marco:

--- Quote from: magic on June 02, 2023, 07:14:20 am ---In high capacity storage arrays

--- End quote ---

Why does a small business need a high capacity storage array for its Excel sheet? That's going to be the reality for the vast majority, they just need storage of email and some bookkeeping cobbled together or some crap off the shelf, not vast amounts of media or measurement data. Even the off the shelf crap can't use up that much storage.

Sure large companies can generate enough plain business data to justify some more effort on the storage, but a small business 99% of the time won't have enough data to mess around with something with finnicky failure modes.

Nominal Animal:

--- Quote from: Marco on June 03, 2023, 10:00:03 am ---
--- Quote from: magic on June 02, 2023, 07:14:20 am ---In high capacity storage arrays

--- End quote ---

Why does a small business need a high capacity storage array for its Excel sheet? That's going to be the reality for the vast majority, they just need storage of email and some bookkeeping cobbled together or some crap off the shelf, not vast amounts of media or measurement data. Even the off the shelf crap can't use up that much storage.

Sure large companies can generate enough plain business data to justify some more effort on the storage, but a small business 99% of the time won't have enough data to mess around with something with finnicky failure modes.

--- End quote ---
Nightly backups for a couple of weeks, then weekly, and finally monthly, before stored on RO media.

The reason is often not so much because of hardware failure, but learning that humans do rather stupid things now and then, and recovering from those without angering your clients and losing business is definitely worth the few thousand euros/dollars it costs to set up.

And this is on top of "standard" off-site backups, assuming there is enough internet bandwidth to do so.

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