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by TristanBall
1307 days ago
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Been a long time since anything iscsi related didn't hand 9k, for boot or otherwise. But I look at it this way. You need 40gbit networking for a single pci3 nvme ( and newer drives can saturate that, or close ) And because you're throttling throughput you'll see much more frequent, longer, queuing delays, on the back of a network stack that ( unless you're using rdma ) is already 5x-10x slower than nvme. It'll be fast enough for lots of things, especially home/lab use, and it'll be amazing if you're upgrading from sata spinning disk.. but 10gbit is slow by modern storage standards. Of course, that's not the only consideration. Shared storage and iscsi in particular can be extremely convenient! And sometimes offers storage functionality that clients don't have ( snapshots, compression, replication ) |
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Don't have anything on the hands to look if the boot firmware even allows to set 9k, but I didn't touch iSCSI boot for a long time, so I would take your word for it.
> But I look at it this way. You need 40gbit networking ... is already 5x-10x slower than nvme.
This one.
> It'll be fast enough for lots of things, especially home/lab use
Yep, in OP's case I would consider just leaving the OS on the local [fast enough] drive and using iSCSI (if for some reason NFS/SMB doesn't fit) for any additional storage. It would be fast enough for almost everything, while completely eliminating any iSCSI boot shenanigans /me shudders in Broadcom flashbacks.
Another neat thing about iSCSI is what you can re/connect it to any device on the network in a couple of minutes (first time, even faster later), sometimes it comes really handy.