archive mirror
 help / color / mirror / Atom feed
From: Steve French <>
To: CIFS <>,
	samba-technical <>,
	LKML <>,
	linux-fsdevel <>,
	ronnie sahlberg <>
Subject: Re: Overview of performance improvements of recent SMB3 compounding patches
Date: Wed, 22 Aug 2018 14:28:01 -0500	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

Continuing the experiments with Ronnie's patches show additional
promising performance results from other common scenarios:

Very good news that the number of roundtrips (request/response pairs
to the server) has dropped so substantially.  Reducing latency, and
allowing the server to more efficiently process the requests leads to
much better performance for these common operations:

- rename goes from 9 request/response pairs to 5 ("mv /mnt/file /mnt/file1")
- hardlink goes from 8 to only 3 (!)  ("ln /mnt/file1 /mnt/file2")
- symlink (with mfsymlinks enabled) goes from 11 to 9 ("ln -s
/mnt/file1 /mnt/file3")
- touch (existing file) 6 down to 4

In current kernel we benefit from compounding now on stafs ("stat -f
/mnt"), and in the earlier note I described the improvements in
create, unlink, mkdir and rmdir which were also awesome.

This is very exciting.

On Tue, Aug 21, 2018 at 1:24 PM Steve French <> wrote:
> In experiments today with Ronnie's most recent compounding patches I
> see the expected significant improvements in create/mkdir/unlink/rmdir
> operations over SMB3 mounts (tests were to Samba but would be similar
> to all modern servers).  See below:
> "touch /mnt/file"  goes from 6 request/response pairs to 4 with
> Ronnie's compounding patches
> "rm /mnt/file" from 5 to 2 request/response pairs
> "mkdir /mnt/newdir" 6 pairs to 3 pairs
> "rmdir /mnt/newdir" 6 pairs down to 2 pairs
> Good job Ronnie!
> --
> Thanks,
> Steve



  reply	other threads:[~2018-08-22 22:54 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-21 18:24 Overview of performance improvements of recent SMB3 compounding patches Steve French
2018-08-22 19:28 ` Steve French [this message]
2018-08-23  1:44   ` Ronnie Sahlberg

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='' \ \ \ \ \ \ \

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).