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From: Masato Minda <minmin@jprs.co.jp>
To: linux-ext4@vger.kernel.org
Subject: How many files to create in one directory?
Date: Mon, 27 Jan 2014 16:16:01 +0900	[thread overview]
Message-ID: <52E607B1.2060206@jprs.co.jp> (raw)

Dear Ext4 Developer;

I've copied the files from VxFS to EXT4, I saw the message “Directory
index full!”. I've checked the search engine and found these mails.

  http://www.spinics.net/lists/linux-ext4/msg25058.html
  http://www.spinics.net/lists/linux-ext4/msg25069.html

Our Ext4's block size was 1024. I've changed the block size from 1024 to
4096. Our problem was solved. But I have question.

How many files to create in one directory in 4096 block size?
I think that it is about 3 million files with perfect hashing.

  16*(4096-16)/8*(4096-8)/8*3/4= 3M

Is this correct?

Thanks in advance.

--
Masato minmin Minda <minmin@jprs.co.jp>
Japan Registry Services Co., Ltd. (JPRS)

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             reply	other threads:[~2014-01-27  7:42 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-01-27  7:16 Masato Minda [this message]
2014-01-27 18:02 ` How many files to create in one directory? Eric Sandeen
2014-01-27 19:39   ` Theodore Ts'o
2014-01-27 19:48     ` Eric Sandeen
2014-01-28  2:53       ` Masato Minda
2014-01-28 21:02       ` Andreas Dilger

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