On Tue, 14 Mar 2006, Jure [UTF-8] Pe?ar wrote:
On Tue, 14 Mar 2006 09:52:55 -0300
Sergio Devojno Bruder <[EMAIL PROTECTED]> wrote:
1. Is one Cyrus is capable enough to work for 1-3 Tera bytes
We currently have 10 TB distributed in 4 cyrus backends (2,2,2 and
4TB), fiber channel to storage. One note: We use a non-stock
directory hash function (2 levels deep instead of one).
This sounds interesting. With two levels deep hash one would easily get
around 32k subdirs per dir limit most file systems have, which
basically leaves you without much choice but reiserfs.
I'm getting dangerously close to 32k users per letter and I don't feel
comfortable with fulldirhash. Even with fulldirhash one can have at
most 26*32k (~850k) users per instance, assuming nice even
distribution ... But two level hash would raise this limit way up and
give more choice of filesystems.
Is your hash available as a patch? Have you thought about getting it
included in 2.3 branch?
You have that many users on one Cyrus server under one partition? Wow.
What about just defining a 2nd partition in Cyrus? It could be on the
same filesystem partition, of course.
Andy
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