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Date:      Sat, 15 Mar 2014 19:38:40 +0100
From:      Polytropon <freebsd@edvax.de>
To:        Friedrich Locke <friedrich.locke@gmail.com>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: limitations
Message-ID:  <20140315193840.2014f4bf.freebsd@edvax.de>
In-Reply-To: <CANMDHqes%2B6LQu5RihBg2wWxOieYaTuEi_FBr65UUV530H72%2Bzg@mail.gmail.com>
References:  <CANMDHqes%2B6LQu5RihBg2wWxOieYaTuEi_FBr65UUV530H72%2Bzg@mail.gmail.com>

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On Sat, 15 Mar 2014 15:26:00 -0300, Friedrich Locke wrote:
> Hi folks,
> 
> i wonder what are the main memory and filesystem limitations on FreeBSD for
> amd64.

The 32 bit OS can address 2^32 = 4 GB, the 64 bit OS
version can address 2^64 = 16,777,216 TB of RAM.

For UFS file system, the maximum size depends on the
amount of available RAM (for fsck). On amd64, you
can assume 2^64 * 32 kB blocks = 512 ZB.

For ZFS file systems, 2^128 = 256 ZB per pool are
possible, and 2^64 pools per system.



Also see the relevant FAQ entries:

https://www.freebsd.org/doc/faq/book.html#idp62096688

https://www.freebsd.org/doc/faq/book.html#idp62112816

as well as

http://en.wikipedia.org/wiki/ZFS

-- 
Polytropon
Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...



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