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From: Keith Busch <[email protected]>
To: Christoph Hellwig <[email protected]>
Cc: Keith Busch <[email protected]>,
	[email protected], [email protected],
	[email protected], [email protected],
	[email protected], [email protected],
	[email protected], [email protected],
	Hannes Reinecke <[email protected]>
Subject: Re: [PATCHv10 9/9] scsi: set permanent stream count in block limits
Date: Wed, 30 Oct 2024 16:32:57 -0600	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

On Wed, Oct 30, 2024 at 05:57:08PM +0100, Christoph Hellwig wrote:
> On Wed, Oct 30, 2024 at 10:42:59AM -0600, Keith Busch wrote:
> > With FDP (with some minor rocksdb changes):
> > 
> > WAF:        1.67
> > IOPS:       1547
> > READ LAT:   1978us
> > UPDATE LAT: 2267us
> 
> Compared to the Numbers Hans presented at Plumbers for the Zoned XFS code,
> which should work just fine with FDP IFF we exposed real write streams,
> which roughly double read nad wirte IOPS and reduce the WAF to almost
> 1 this doesn't look too spectacular to be honest, but it sure it something.

Hold up... I absolutely appreciate the work Hans is and has done. But
are you talking about this talk?

https://lpc.events/event/18/contributions/1822/attachments/1464/3105/Zoned%20XFS%20LPC%20Zoned%20MC%202024%20V1.pdf

That is very much apples-to-oranges. The B+ isn't on the same device
being evaluated for WAF, where this has all that mixed in. I think the
results are pretty good, all things considered.
 
> I just wish we could get the real infraѕtructure instead of some band
> aid, which makes it really hard to expose the real thing because now
> it's been taken up and directly wired to a UAPI.
> one

I don't know what make of this. I think we're talking past each other.

  parent reply	other threads:[~2024-10-30 22:33 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-10-29 15:19 [PATCHv10 0/9] write hints with nvme fdp, scsi streams Keith Busch
2024-10-29 15:19 ` [PATCHv10 1/9] block: use generic u16 for write hints Keith Busch
2024-10-29 17:21   ` Bart Van Assche
2024-10-29 15:19 ` [PATCHv10 2/9] block: introduce max_write_hints queue limit Keith Busch
2024-10-29 15:19 ` [PATCHv10 3/9] statx: add write hint information Keith Busch
2024-10-29 15:19 ` [PATCHv10 4/9] block: allow ability to limit partition write hints Keith Busch
2024-10-29 15:23   ` Christoph Hellwig
2024-10-29 17:25   ` Bart Van Assche
2024-10-30  4:46     ` Christoph Hellwig
2024-10-30 20:11       ` Keith Busch
2024-10-30 20:26         ` Bart Van Assche
2024-10-30 20:37           ` Keith Busch
2024-10-30 21:15             ` Bart Van Assche
2024-10-29 15:19 ` [PATCHv10 5/9] block, fs: add write hint to kiocb Keith Busch
2024-10-29 15:19 ` [PATCHv10 6/9] io_uring: enable per-io hinting capability Keith Busch
2024-10-29 15:19 ` [PATCHv10 7/9] block: export placement hint feature Keith Busch
2024-10-29 15:19 ` [PATCHv10 8/9] nvme: enable FDP support Keith Busch
2024-10-30  0:24   ` Chaitanya Kulkarni
2024-10-29 15:19 ` [PATCHv10 9/9] scsi: set permanent stream count in block limits Keith Busch
2024-10-29 15:26   ` Christoph Hellwig
2024-10-29 15:34     ` Keith Busch
2024-10-29 15:37       ` Christoph Hellwig
2024-10-29 15:38         ` Keith Busch
2024-10-29 15:53           ` Christoph Hellwig
2024-10-29 16:22             ` Keith Busch
2024-10-30  4:55               ` Christoph Hellwig
2024-10-30 15:41                 ` Keith Busch
2024-10-30 15:45                   ` Christoph Hellwig
2024-10-30 15:48                     ` Keith Busch
2024-10-30 15:50                       ` Christoph Hellwig
2024-10-30 16:42                         ` Keith Busch
2024-10-30 16:57                           ` Christoph Hellwig
2024-10-30 17:05                             ` Keith Busch
2024-10-30 17:15                               ` Christoph Hellwig
2024-10-30 17:23                             ` Keith Busch
2024-10-30 22:32                             ` Keith Busch [this message]
2024-10-30 16:59                 ` Bart Van Assche
2024-10-30 17:14                   ` Christoph Hellwig
2024-10-30 17:44                     ` Bart Van Assche
2024-10-29 17:18     ` Bart Van Assche
2024-10-30  5:42       ` Christoph Hellwig
2024-10-29 15:24 ` [PATCHv10 0/9] write hints with nvme fdp, scsi streams Christoph Hellwig

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