From: Roman Mamedov <rm@romanrm.net>
To: Marco Lorenzo Crociani <marcoc@prismatelecomtesting.com>
Cc: linux-btrfs@vger.kernel.org
Subject: Re: mount time for big filesystems
Date: Thu, 31 Aug 2017 16:36:56 +0500 [thread overview]
Message-ID: <20170831163656.6be88191@natsu> (raw)
In-Reply-To: <556e7650-8556-d5ca-273e-6c158c1d032e@prismatelecomtesting.com>
On Thu, 31 Aug 2017 12:43:19 +0200
Marco Lorenzo Crociani <marcoc@prismatelecomtesting.com> wrote:
> Hi,
> this 37T filesystem took some times to mount. It has 47
> subvolumes/snapshots and is mounted with
> noatime,compress=zlib,space_cache. Is it normal, due to its size?
If you could implement SSD caching in front of your FS (such as lvmcache or
bcache), that would work wonders for performance in general, and especially
for mount times. I have seen amazing results with lvmcache (of just 32 GB) for
a 14 TB FS.
As for in general, with your FS size perhaps you should be using
"space_cache=v2" for better performance, but I'm not sure if that will have
any effect on mount time (aside from slowing down the first mount with that).
--
With respect,
Roman
next prev parent reply other threads:[~2017-08-31 11:36 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-31 10:43 mount time for big filesystems Marco Lorenzo Crociani
2017-08-31 11:00 ` Hans van Kranenburg
2017-08-31 11:22 ` Austin S. Hemmelgarn
2017-08-31 11:36 ` Roman Mamedov [this message]
2017-08-31 11:45 ` Austin S. Hemmelgarn
2017-08-31 12:16 ` Roman Mamedov
2017-08-31 14:13 ` Qu Wenruo
2017-09-01 13:52 ` Juan Orti Alcaine
2017-09-01 13:59 ` Austin S. Hemmelgarn
[not found] ` <CAC+fKQWFbdF6b3jGO_6hG_pNNzKobBYMeSNyEi5XRCf5YKa81Q@mail.gmail.com>
2017-09-01 15:20 ` Austin S. Hemmelgarn
2017-09-01 22:41 ` Dan Merillat
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